Jet Jwds-1632osc Service manual

Operating Instructions and Parts Manual

Drum Sander

Model JWDS-1632OSC

JET

427 New Sanford Road

LaVergne, Tennessee 37086 Part No. M-723525

Ph.: 800-274-6848 Edition 1 12/2022

Shown with optional infeed/outfeed tables

1.0 IMPORTANT SAFETY

INSTRUCTIONS

WARNING – To reduce risk of injury:

1. Read and understand the entire owner's

manual before attempting assembly or

operation.

2. Read and understand the warnings posted on

the machine and in this manual. Failure to

comply with all warnings may cause serious

injury.

3. Replace warning labels if they become

obscured or removed.

4. This drum sander is designed and intended for

use by properly trained and experienced

personnel only. If you are not familiar with the

proper and safe operation of a drum sander, do

not use until proper training and knowledge

have been obtained.

5. Do not use this drum sander for other than its

intended use. If used for other purposes, JET

disclaims any real or implied warranty and holds

itself harmless from any injury that may result

from that use.

6. Always wear ANSI Z87.1 approved safety

glasses or face shield while using this drum

sander. (Everyday eyeglasses only have impact

resistant lenses; they are not safety glasses.)

7. Before operating this machine, remove tie,

rings, watches and other jewelry, and roll

sleeves up past the elbows. Do not wear loose

clothing. Confine long hair. Non-slip footwear or

anti-skid floor strips are recommended. Do not

wear gloves.

8. Kickback occurs when the workpiece is thrown

towards the operator at a high rate of speed. If

you do not have a clear understanding of

kickback and how it occurs, DO NOT operate

this drum sander.

9. Wear hearing protection (plugs or muffs) during

extended periods of operation.

10. Do not operate this machine while tired or under

the influence of drugs, alcohol, or any

medication.

11. Make certain the switch is in the OFF position

before connecting the machine to the power

supply.

12. Make certain the machine is properly grounded.

13. Make all machine adjustments or maintenance

with the machine unplugged from the power

source.

14. Remove adjusting keys and wrenches. Form a

habit of checking to see that keys and adjusting

wrenches are removed from the machine

before turning it on.

15. Keep safety guards in place at all times when

the machine is in use. If removed for

maintenance purposes, use extreme caution

and replace the guards immediately after

completion of maintenance.

16. Make sure the sander is firmly secured to the

stand or work table before use.

17. Check damaged parts. Before further use of the

machine, a guard or other part that is damaged

should be carefully checked to determine that it

will operate properly and perform its intended

function. Check for alignment of moving parts,

binding of moving parts, breakage of parts,

mounting and any other conditions that may

affect its operation. A guard or other part that is

damaged should be properly repaired or

replaced.

18. Provide for adequate space surrounding work

area and non-glare, overhead lighting.

19. Keep the floor around the machine clean and

free of scrap material, oil and grease.

20. Keep visitors a safe distance from the work

area. Keep children away.

21. Make your workshop child proof with padlocks,

master switches or by removing starter keys.

22. Give your work undivided attention. Looking

around, carrying on a conversation and “horse-

play” are careless acts that can result in serious

injury.

23. Maintain a balanced stance at all times so that

you do not fall onto moving parts. Do not

overreach or use excessive force to perform

any machine operation.

24. Use the right tool at the correct speed and feed

rate. Do not force a tool or attachment to do a

job for which it was not designed. The right tool

will do the job better and more safely.

25. Use recommended accessories; improper

accessories may be hazardous.

26. Maintain tools with care. Keep conveyor and

abrasives clean for the best and safest

performance. Follow instructions for lubricating

and changing accessories.

27. Turn off the machine before cleaning. Use a

brush or compressed air to remove chips or

debris — do not use bare hands.

28. Do not stand on the machine. Serious injury

could occur if the machine tips over.

29. Never leave the machine running unattended.

Turn the power off and do not leave the

machine until it comes to a complete stop.

30. Remove loose items and unnecessary work

pieces from the area before starting the

machine.

31. Stand out of the path of workpiece when

feeding a board.

32. Always feed stock against the rotation of drum.

33. Keep hands clear when feeding parts onto the

conveyor. The part will be forced down as it

begins to feed, causing a pinching action

between the part and the conveyor table. Never

reach into a running machine. Turn off sander,

allow it to come to a complete stop, and

disconnect from power, before attempting to

retrieve parts from beneath the drum.

34. Pay particular attention to instructions on

reducing risk of kickback.

35. Don’t use in dangerous environment. Don’t use

power tools in damp or wet location or expose

them to rain. Keep work area well lighted.

Familiarize yourself with the following safety notices used in this manual:

This means that if precautions are not heeded, it may result in minor injury and/or possible

machine damage.

This means that if precautions are not heeded, it may result in serious, or possibly even fatal,

injury.

2.0 About This Manual

This manual is provided by JET, covering the safe operation and maintenance procedures for a JET Model

JWDS-1632OSC Drum Sander. This manual contains instructions on installation, safety precautions, general

operating procedures, maintenance instructions and parts breakdown. Your machine has been designed and

constructed to provide consistent, long-term operation if used in accordance with the instructions as set forth in

this document.

This manual is not intended to be an exhaustive guide to sanding methods, choice of stock, selection of

abrasives, etc. Additional knowledge may be obtained from experienced users or trade articles. Whatever

accepted methods are used, always make personal safety a priority.

If there are questions or comments, please contact your local supplier or JET. JET can also be reached at our

web site: www.jettools.com.

Retain this manual for future reference. If the machine transfers ownership, the manual should accompany it.

Use the provided mail-in card, or register your product online - http://www.jettools.com/us/en/service-and-

support/warranty/registration/

Read and understand the entire contents of this manual before attempting assembly or

operation! Failure to comply may cause serious injury!

WARNING: This product can expose you to

chemicals including lead which is known to the

State of California to cause cancer and birth

defects or other reproductive harm. For more

information go to http://www.p65warnings.ca.

gov.

WARNING: Drilling, sawing, sanding or

machining wood products generates wood dust

and other substances known to the State of

California to cause cancer. Avoid inhaling dust

generated from wood products or use a dust

mask or other safeguards for personal

protection.

Wood products emit chemicals known to the

State of California to cause birth defects or other

reproductive harm. For more information go to

http://www.p65warnings.ca.gov/wood.

3.0 Table of Contents

Section Page

1.0 IMPORTANT SAFETY INSTRUCTIONS ....................................................................................................... 2

2.0 About this Manual .......................................................................................................................................... 3

3.0 Table of Contents ........................................................................................................................................... 4

4.0 Specifications ................................................................................................................................................. 5

5.0 Features and Terminology ............................................................................................................................. 6

6.0 Setup and Assembly ...................................................................................................................................... 7

6.1 Shipping Contents ................................................................................................................................... 7

6.2 Tools Required for Assembly .................................................................................................................. 7

6.3 Assembling Stand ................................................................................................................................... 8

6.4 Mounting Sander to Stand ...................................................................................................................... 8

6.5 Infeed and Outfeed Tables (optional accessory) .................................................................................... 9

6.6 Dust Collection ........................................................................................................................................ 9

6.7 Installing Abrasives ................................................................................................................................. 9

7.0 Electrical Connections ................................................................................................................................. 10

7.1 GROUNDING INSTRUCTIONS ............................................................................................................ 10

7.2 Extension Cords .................................................................................................................................... 11

8.0 Adjustments ................................................................................................................................................. 11

8.1 Drum Height Control ............................................................................................................................. 11

8.2 Depth Scale ........................................................................................................................................... 11

8.3 Conveyor Belt Tension/Tracking ........................................................................................................... 11

8.4 Inspecting Drum Alignment ................................................................................................................... 12

8.5 Tension Roller Adjustment .................................................................................................................... 13

9.0 Operation ..................................................................................................................................................... 13

9.1 On/Off Switch (sanding drum) ............................................................................................................... 13

9.2 Oscillation Mode .................................................................................................................................... 13

9.3 Basic Operating Procedure ................................................................................................................... 14

9.4 Setting Depth of Cut .............................................................................................................................. 14

9.5 Establishing Drum Height ...................................................................................................................... 14

9.6 Selecting SandSmart™ Feed Rates ..................................................................................................... 14

9.7 Maximum Performance Tips ................................................................................................................. 15

10.0 User-maintenance ...................................................................................................................................... 16

10.1 Cleaning and Lubrication .................................................................................................................... 16

10.2 Drum Maintenance .............................................................................................................................. 16

10.3 Conveyor Belt Replacement ............................................................................................................... 17

10.4 Commutator Brush Inspection ............................................................................................................. 18

10.5 Additional Servicing ............................................................................................................................. 18

11.0 Tracker Kit .................................................................................................................................................. 19

12.0 Abrasives ................................................................................................................................................... 20

12.1 Selecting Drum Abrasives ................................................................................................................... 20

12.2 Cleaning Abrasive Strips ..................................................................................................................... 20

12.3 Increasing Abrasive Life ...................................................................................................................... 20

12.4 Abrasive Selection Guide .................................................................................................................... 20

13.0 Troubleshooting JWDS-1632OSC Drum Sander ....................................................................................... 21

14.0 Optional Accessories ................................................................................................................................. 23

15.0 Replacement Parts .................................................................................................................................... 23

15.1.1 JWDS-1632OSC Head Assembly – Exploded View ........................................................................ 24

15.1.2 JWDS-1632OSC Head Assembly – Parts List ................................................................................. 25

15.2.1 JWDS-1632OSC Conveyor Table Assembly – Exploded View ....................................................... 27

15.2.2. JWDS-1632OSC Conveyor Table Assembly – Parts List ................................................................ 27

15.3.1 JWDS-1632OSC Infeed and Outfeed Tables (OPTIONAL) – Exploded View ................................. 28

15.3.2 JWDS-1632OSC Infeed and Outfeed Tables (OPTIONAL) – Parts List .......................................... 28

15.4.1 JWDS-1632OSC Open Stand Assembly – Exploded View ............................................................. 29

15.4.2 JWDS-1632OSC Open Stand Assembly – Parts List ...................................................................... 29

16.0 Electrical Connections for JWDS-1632OSC .............................................................................................. 30

17.0 Warranty and Service ................................................................................................................................ 31

4.0 Specifications

Model number ........................................................................................................................................ JWDS-1632OSC

Stock numbers:

Sander with Open Stand .......................................................................................................................... JT9-723525

Motor and electricals:

Drum motor:

Motor Type ............................................................................... totally enclosed fan cooled, induction, capacitor start

Horsepower ................................................................................................................................................... 1-1/2 HP

Phase ................................................................................................................................................................. single

Voltage ........................................................................................................................................................ 115V only

Cycle .................................................................................................................................................................... 60Hz

Listed FLA (full load amps) ................................................................................................................................... 14 A

Motor Speed ............................................................................................................................................... 1725 RPM

Starting Amps ....................................................................................................................................................... 32 A

Running Amps (no load) ...................................................................................................................................... 9.5 A

Start Capacitor................................................................................................................................. 300MFD 125VAC

Running Capacitor .................................................................................................................................................. n/a

Conveyor motor:

Motor Type ................................................................................................................................... totally enclosed DC

Horsepower .................................................................................................................................................... 1/30 HP

Phase ................................................................................................................................................................. single

Voltage .......................................................................................................................................................... 115V DC

Listed FLA (full load amps) ................................................................................................................................ 0.60 A

Motor Speed ................................................................................................................................................... 54 RPM

On/off Switch ............................................................................................................................ toggle, with safety key

Power Cord ................................................................................................................... 12AWG x 3C, 6 ft. (1830 mm)

Power Plug Installed .................................................................................................................................... 125V 15A

Recommended Circuit and Fuse/Breaker Size 1 ................................................................................................... 20A

Sound Emission 2 ...................................................................................................... 63 dB at 100cm; 66 dB at 50cm

Oscillating motor:

Motor Type ................................................................................................................................... totally enclosed DC

Horsepower .................................................................................................................................................... 1/30 HP

Phase ................................................................................................................................................................. single

Voltage .......................................................................................................................................................... 115V DC

Listed FLA (full load amps) ................................................................................................................................ 0.60 A

Motor Speed ................................................................................................................................................. 120 RPM

Capacities:

Maximum Board Width (single pass) .................................................................................................. 16 in. (406 mm)

Maximum Board Width (two passes) .................................................................................................. 32 in. (812 mm)

Maximum Board Thickness ................................................................................................................. 3 in. (76.2 mm)

Minimum Board Length .................................................................................................................... 2-3/8 in. (60 mm)

Minimum Board Thickness 3 ............................................................................................................. 1/32 in. (0.8 mm)

Main materials:

Main Body................................................................................................................... aluminum die casting and steel

Open Stand .......................................................................................................................................................... steel

Drum .............................................................................................................................................. extruded aluminum

Extension Tables (optional) .................................................................................................................................. steel

Conveyor Table .................................................................................................................................................... steel

Drum Height Adjustment Handle ............................................................................ aluminum die casting and plastic

Sanding drum:

Drum Dimensions ....................................................................................................... dia. 5 in. x 16L (127 x 406 mm)

Drum Speed ............................................................................................................................................... 1725 RPM

Oscillation Speed ......................................................... Singel speed, 120 strokes per Minute; 1/2" (12.7mm) stroke

Sanding Paper Installed .................................................................................................................................... 80 grit

Drum Elevation Per One Rotation of Handwheel ............................................................................................ 1/16 in.

1 Subject to local/national electrical codes.

2 The specified values are emission levels and are not necessarily to be seen as safe operating levels. As workplace

conditions vary, this information is intended to allow the user to make a better estimation of the hazards and risks

involved only.

3 Use of a carrier or backer board (not provided) is recommended for cuts 1/16” or less. See sect. 9.3.

Conveyor:

Conveyor Speed ............................................................................... infinitely variable within 0 to 10 FPM (0-3 MPM)

Conveyor Table Dimensions ........................................................................ 17-15/16 x 16-17/32 in. (456 x 420 mm)

Conveyor Height From Floor .................................................................................................... 31-31/32 in. (812 mm)

Dust collection:

Dust Port Outside Diameter .................................................................................................................. 4 in. (100mm)

Minimum Extraction Volume Required ..................................................................................... 400 CFM (11.3 CMM)

Dimensions:

Shipping Carton .............................................................................. 44-1/2 x 26 x 25-3/16 in. (1130 x 660 x 640 mm)

Assembled Dimensions ...................................................... 42-13/16 x 20-5/16 x 49-1/8 in. (1088 x 516 x 1248 mm)

Weights:

Net Weight ......................................................................................................................................... 191 lb. (86.7 kg)

Shipping Weight .............................................................................................................................. 227 lb. (103.3 kg)

The specifications in this manual were current at time of publication, but because of our policy of continuous

improvement, JET reserves the right to change specifications at any time and without prior notice, without

incurring obligations.

5.0 Features and Terminology

The illustration below shows the major components and features of the JWDS-1632OSC Sander. These are

referenced throughout the manual and will help to familiarize you with the operation and functions of the machine.

Figure 5-1

Read and understand the

entire contents of this manual before

attempting set-up or operation! Failure to

comply may cause serious injury.

6.0 Setup and Assembly

Open boxes and check for shipping damage. Report

any damage immediately to your distributor and

shipping agent. Do not discard any shipping

material until the Drum Sander is assembled and

running properly.

Compare the contents of your boxes with the

following parts list to make sure all parts are intact.

Any missing parts should be reported to your

distributor. Read this instruction manual thoroughly

for assembly, maintenance, and safety instructions.

6.1 Shipping Contents

Drum Sander: (see Figure 6-1)

1 Sander with conveyor table (A)

1 Handle (B)

1 Instruction manual (not shown)

1 Warranty card (not shown)

4 Socket head cap screws with

Flat washer, M8 x 16 (not shown – used to

attach the sander to the open stand)

Stand: (see Figure 6-2)

1 Stand assembly including:

1 Shelf (C)

2 Short rails (D)

2 Long rails (E)

4 Legs (F)

4 Leveling feet (G)

8 Flat washers (H)

4 Hex nuts (I)

24 Carriage Bolts, M8x16 (J)

24 Flanged Lock Nuts, M8 (K)

6.2 Tools Required for Assembly

12mm and 14mm wrenches

3mm and 6mm hex wrenches

Straight edge (such as straight steel bar or carefully

jointed board)

Figure 6-1: Shipping Contents

Figure 6-2: Shipping Contents

Figure 6-3: Assembly

6.3 Assembling Stand

(Refer to Figure 6-3. If further clarification is needed,

consult parts breakdown at back of this manual.

1. Assemble legs (F) to outside of Short Rails (D)

using carriage bolts (J) and flanged lock nuts

(K). Finger tighten only.

2. Assemble Long Rail (E) on inside of legs and

on top of Short Rails (D). Finger tighten only.

NOTE: Flange of Long Rail overlaps flange of

Short Rail. See inset, Figure 6-3.

3. Turn stand upside down. Install shelf (C) into

legs using carriage bolts and lock nuts.

4. Fully tighten all flanged lock nuts in shelf and

legs.

5. Insert leveling foot (G) into bottom hole of leg

with flat washers and hex nut.

6. Turn stand right-side up and push down on it to

settle it. Tighten all flanged lock nuts on stand.

7. Level the stand using the leveling feet. Tighten

the hex nuts against the leg flange.

6.4 Mounting Sander to Stand

1. Lift drum head assembly out of the box, and

temporarily rest it crosswise on top of stand.

Use an assistant to help lift

the sander.

2. Install height adjustment handle (B) and tighten

set screw.

3. Rotate height adjustment handle

counterclockwise to raise drum and free the

wood support block.

4. Position sander atop stand so that the four

threaded holes of base align with holes in the

stand rails (Figure 6).

5. Fasten base to stand (from beneath) with the

four screws and washers.

6.5 Infeed and Outfeed Tables

(optional accessory)

The sander must be bolted to the stand or a work

table when using these table extensions. Maximum

working load of each table is 35 pounds. Fasteners

are provided with the extension tables.

1. Install infeed and outfeed brackets (L, Figure 6-

3) to the threaded holes in sander base with

M8x16 socket head cap screws and flat

washers. Make sure left and right brackets are

oriented as shown. The brackets should be

flush against the base. NOTE: Long brackets

mount to front (infeed); short brackets to rear

(outfeed).

2. Place extension tables over brackets and

secure with M8x12 socket head cap screws and

washers. Finger tighten only.

3. Position tables slightly below conveyor belt

surface for proper support of stock. To check

position, place a straight edge on one side of

conveyor table under drum and extending out

over the extension table. Lower drum to

securely hold straight-edge in place. See Figure

6-4. Raise infeed/outfeed table until table

surface is slightly below conveyor belt surface.

Tighten screws on that side.

4. Reposition straight-edge to other side of table

and repeat.

If stock being sanded is bowed, warped or otherwise

inconsistent, be sure tables are lower than top of

conveyor table.

If stock slips on conveyor, the tables may be

positioned too high. Lower tables to allow stock to

remain in contact with conveyor.

Figure 6-4: Extension Table Alignment

6.6 Dust Collection

Dust collection is mandatory for a safe work

environment and extended abrasive life. The

JWDS-1632OSC is equipped with a 4-inch dust

collection port. Secure a 4-inch dust collection hose

to the port with a hose clamp (Figure 6-5) and

connect to a high-volume dust collector (minimum

400 CFM). Note: Dryer vent hose is not acceptable

for this purpose.

A standard shop type canister (16 gal. or larger) can

be used for short periods of sanding time but

requires converting the hose size down to 2-1/2”. An

adaptor is required.

Figure 6-5 Dust Collection Port (hose and clamp

not included)

6.7 Installing Abrasives

Proper attachment of the abrasive strip to the drum

is critical to achieving top performance from your

drum sander.

An 80-grit, 3-inch-wide abrasive strip is pre-installed

on the drum. Optional pre-cut (“Ready-to-Wrap”)

abrasives of different grits are also available; see

sect. 14.0.

(TIP: If you are using an after-market abrasive, use

a new JET-supplied abrasive as a template to

quickly cut a new strip. Alternatively, a diagram is

supplied in Figure 6-6 showing trim measurements.)

Figure 6-6: Abrasive Trimming – JWDS-

1632OSCONLY (not applicable to Ready-to-Wrap

strips)

1. Press fastener lever (Figure 6-7) on outboard

(left) end of drum and insert tapered end of

abrasive through slit in fastener, as shown.

Align tapered edge of abrasive strip with left

edge of drum. Insert enough strip so that the

right edge aligns with the reference notch; this

will ensure the proper length of strip to be

secured at the opposite end of the drum.

Figure 6-7

2. Release fastener lever to secure end of strip.

3. Begin wrapping abrasive around drum. The

tapered edge of strip end should follow as close

as possible to edge of drum.

4. Continue to wrap abrasive in spiral fashion by

rotating drum with one hand and guiding strip

with the other. See Figure 6-8.

Successive windings of strip must not have any

overlap. They should be flush with previous

windings or with a slight gap between.

Figure 6-8

5. Press inboard take-up lever (Figure 6-9) and

insert trailing end of strip as far as it will go. If

necessary, trim tapered end of abrasive strip.

6. Release inboard take-up lever to secure strip.

All abrasive strips will stretch over time as they are

used and may stretch enough to allow the take-up

lever to reach its lowest position so that it cannot

maintain tension on the strip. If this occurs, follow

the above procedures to reset the take-up lever.

Figure 6-9

7.0 Electrical Connections

Electrical connections must be

made by a qualified electrician in compliance

with all relevant codes. This machine must be

properly grounded to help prevent electrical

shock and possible fatal injury.

IMPORTANT: Before connecting the sander to

power source, be sure the power switch is in off

position.

115-Volt Operation

This sander is ready for 115V operation and must

be grounded. If a malfunction or breakdown occurs,

proper grounding reduces the risk of electric shock.

This shaper has a grounded three-prong electrical

plug.

We recommend that you connect this sander to a

dedicated 20-amp circuit with circuit breaker or fuse.

If connecting to a circuit protected by fuses, use time

delay fuse marked “D”. NOTE: Local codes take

precedence over recommendations.

7.1 GROUNDING INSTRUCTIONS

You must connect the electrical

plug to a properly grounded, three-wire

electrical outlet as shown in Figure 7-1. If you do

not have a properly grounded, three-wire

electrical outlet, you must contact a qualified

electrician to install one. Installation must

comply with all local codes and ordinances. Do

not use this sander until a properly grounded,

three-wire electrical outlet is installed and ready

for use.

Figure 7-1

Never use an adapter to

connect the three-prong electrical plug to a non-

grounded, 2-pole receptacle. Do not modify the

plug provided. Improper connection of the

grounding conductor can result in a risk of

electric shock.

Check with a qualified

electrician or service person if you do not

completely understand these grounding

instructions or if the proper grounding of this

tool is in doubt. Failure to comply may cause

serious or fatal injury.

Repair or replace damaged or worn cord

immediately.

7.2 Extension Cords

The use of extension cords is discouraged; try to

position machines near the power source. If an

extension cord is necessary, make sure it is in good

condition. When using an extension cord, be sure to

use one heavy enough to carry the current your

product will draw. An undersized cord will cause a

drop in line voltage resulting in loss of power and

overheating. Table 1 shows correct size to use

depending on cord length and nameplate ampere

rating. If in doubt, use the next heavier gauge. The

smaller the gauge number, the heavier the cord.

Recommended Gauges (AWG) of Extension Cords

Amps

Extension Cord Length *

feet

100

feet

150

feet

200

feet

< 5

5 to 8

8 to 12

12 to 15

15 to 20

21 to 30

*based on limiting the line voltage drop to 5V at 150% of the rated

amperes.

NR: Not Recommended.

Table 1

8.0 Adjustments

Disconnect sander from power

source before making adjustments.

8.1 Drum Height Control

Drum height and depth of cut are controlled by

height adjustment handle (see Figure 5-1). Rotating

handle clockwise lowers drum, counterclockwise

raises it. One revolution of handle will move drum

approximately 1/16” (or 1/4 turn = approx. 1/64”), as

shown on the label below handle.

8.2 Depth Scale

The depth scale indicates distance between bottom

of sanding drum and top of conveyor belt.

Figure 8-1: Depth Scale Adjustment

8.3 Conveyor Belt Tension/Tracking

Conveyor belt tension adjustment may be

necessary during the break-in period to compensate

for belt stretching.

8.3.1 Belt Tension Adjustment

1. Unplug sander from power source.

2. Adjust take-up screw nuts (Figure 8-2) with

5mm hex wrench. Do this on both sides of

conveyor to obtain approximately equal tension

on both sides of sanding belt when taut.

NOTE: Insufficient belt tension will cause

slippage of conveyor belt on drive roller during

sanding operation. The conveyor belt is too

loose if it can be stopped by hand pressure

applied directly to top of moving conveyor belt.

Excessive belt tension can result in bent rollers,

bent brackets, and/or premature wearing of

bushings or conveyor belt.

Figure 8-2: Belt Tension Adjustment

8.3.2 Tracking Adjustment

A belt tracks correctly when it moves centrally on the

conveyor rollers without drifting to either side.

Tracking adjustments are made while conveyor belt

is running.

1. Unplug sander from power source.

2. Make sure proper belt tension has been

achieved (see sect. 8.3.1).

3. Turn on conveyor and set to maximum speed.

Watch for tendency of conveyor belt to drift to

one side of conveyor. If it drifts, tighten or

loosen take-up screw.

Note: Adjust take-up screw only 1/4 turn at a

time. Allow time for belt to react to adjustments

before proceeding further.

Try to avoid over adjustments, as this may

affect belt tension. If tension is affected, if may

become necessary to use both take-up screws

to accomplish tensioning and tracking.

8.3.3 Trackers

The sander comes equipped with “Trackers”,

ceramic guides that reduce the amount of

adjustments needed to keep conveyor belt tracked

(centered) on conveyor table. These guides have a

magnetic backing to keep them in place. If a Tracker

wears through, it can be reversed by turning it over.

See sect. 11.0 Tracker Kit for more information

about re-setting trackers.

8.4 Inspecting Drum Alignment

The sanding drum must be parallel to conveyor table

for proper machine operation. The sanding drum

comes pre-aligned from the manufacturer. If a

problem with drum alignment should occur, follow

the instructions below.

First, inspect the alignment with a gauge of some

kind. The following procedure uses a steel straight-

edge as a gauge.

1. Unplug sander from power source.

2. Open dust cover and remove abrasive strip

from drum.

3. Insert gauge between drum and conveyor table

at outboard side of drum (A, Figure 8-3).

Figure 8-3: Drum Alignment

4. With dust cover open, lower sanding drum while

slowly rotating drum by hand, until drum lightly

contacts gauge. NOTE: Make sure drum

contacts gauge, not just the tension rollers.

5. Remove gauge and place under drum at

inboard side.

6. If drum does not contact gauge equally on both

ends of drum, alignment is needed.

To align conveyor table with drum:

7. Loosen both table locks (B, Figure 8-3)

Loosen both table locks

before adjusting drum alignment.

8. Turn knob (C) to raise or lower outboard end of

table. Follow directional marks on label (+

raises, - lowers).

9. Retighten table locks (B).

8.4.1 Fine-Tuning Drum Alignment

Note: This is an operational test for sanding boards

wider than the drum. Perform this procedure only

after you have become familiar with sander

operation.

When sanding boards wider than the drum, table

alignment is critical and table must be adjusted

exactly level to slightly lower on the outboard end.

This will prevent any ridges from developing in the

stock. Always check this on a piece of scrap wood,

as follows, before sanding the work piece.

1. Run a piece of scrap wood approximately 6”

wide by 30” to 40” long through the sander

sideways so that end of board extends past

outboard side of drum.

2. Without changing drum height, rotate board

180° and sand the same side.

3. If a ridge is visible where the drum overlaps,

lower table at outboard end slightly by turning

knob (C, Figure 8-3).

4. Repeat this process until the ridge is eliminated

and entire board is sanded.

Note: When sanding narrow stock (less than 16”),

return conveyor table to parallel position. Turn knob

opposite direction until lock nut (D, Figure 8-3) is

contacted. The lock nut provides a positive stop for

table parallelism.

8.5 Tension Roller Adjustment

The infeed and outfeed rollers are tensioned to

provide downward pressure on the workpiece to

prevent slippage on the feed conveyor. Tension

rollers have been set by the manufacturer but

should be inspected and may require adjustment as

the sander receives use.

Improperly adjusted tension

rollers (i.e. those set too high, rendering them

non-functional) could allow kickback of pieces

being sanded.

You can increase or decrease tension roller

pressure by turning the screws on the tension roller

brackets (Figure 8-4).

Figure 8-4: Tension Adjustment Screws

Too much tension roller pressure can result in a

“snipe” mark, which is a visible line running across

the width of the board and located approximately 2-

1/4” from end of board.

If snipe occurs on the leading end of board, adjust

outfeed tension roller. If the snipe occurs on trailing

end of board, adjust infeed tension roller.

9.0 Operation

Before using your drum sander, review the previous

sections on initial set-up and adjustment. Before

operating, make sure an abrasive strip is mounted

and a proper dust collection system is connected.

9.1 On/Off Switch (Sanding Drum)

For the On/Off Switch to work, you must insert the

Safety Key (see Figure 9-1). To start drum, pull

paddle switch upward. To stop drum, push switch

down. This switch operates sanding drum only. The

conveyor is controlled separately (see Figure 9-1).

To prevent unauthorized use of sander, push switch

OFF and remove the Safety Key (Figure 9-1). Store

key in a safe place. You must reinsert the Safety

Key to start sander. NOTE: Conveyor belt can still

operate with the key removed.

Figure 9-1: Controls and Safety Key

9.2 Oscillation Mode

You can operate the sander with sanding drum in

fixed position or in oscillation mode. The top switch

(Figure 9-1) activates oscillation mode.

NOTE: If changing from oscillation mode to fixed

mode, allow drum to center itself over conveyor

before turning off oscillation mode.

If a power outage occurs, all

functions currently active will restart when

power is restored. For safety, if an outage

occurs immediately shut off sander switch and

conveyor dial.

9.3 Basic Operating Procedure

1. Establish depth of cut.

2. Start dust collection system.

3. Start sanding drum.

4. Start oscillation (if desired).

5. Start conveyor and select feed rate.

6. Feed stock through machine.

To feed stock through the sander, rest and hold

board to be sanded on conveyor belt, allowing

conveyor belt to carry board into drum. Once stock

is halfway through, reposition yourself to outfeed

side of machine to receive and control board as it

exits.

Board will be forced down

against conveyor table as it begins feeding,

causing pinching hazard. Keep fingers away.

Do not open drum hood until

drum comes to a complete stop.

9.4 Setting Depth of Cut

Adjusting the drum sander for proper contact

between abrasive and stock determines the depth

of cut. The depth of cut is controlled by the height

adjustment handle.

It may take experimentation to determine proper

depth of cut, given the variables of abrasive grit,

type of wood, and feed rate. For best results, use

scrap wood to practice sanding and to develop skill

and familiarity with the machine before doing finish

work.

A combination of several variables will determine

proper depth of cut to use, including the following:

1. Abrasive type and grit size.

2. Width of piece being processed.

3. Hardness of piece.

4. Feed rate of conveyor belt.

NOTE: The use of a carrier or backer board (not

provided), is recommended for cuts 1/16” or less.

This is a flat board, usually of wood or MDF, slightly

larger than the workpiece and of even thickness,

placed beneath the workpiece as it is fed through

the sander. The workpiece may be attached to the

carrier with rubber cement, carpenter’s tape, or

some other easily removable adhesive. Some

operators use a rubber or textured surface on the

carrier to help stabilize the workpiece by simple

friction.

9.5 Establishing Drum Height

A good rule of thumb when sanding with grits finer

than 80:

1. To establish drum height, position stock under

the drum. DO NOT start drum.

2. Lower drum to the stock thickness, making sure

drum can still be rotated by hand while just

contacting stock.

Do not start drum while in

contact with stock.

3. Without changing drum height, turn on

conveyor and run the stock out from under the

drum. Start sanding drum and sand stock at that

same position.

4. With the drum operating, feed stock under the

drum from the infeed side and against the

rotation of the drum. Always maintain control of

the stock to avoid kickback and/or slippage.

NOTE: If motor heats up during operation,

depth of cut may be too great for size of grit

and/or feed rate may be too fast.

For sanding with grits coarser than 80, you can

lower the drum slightly.

Always maintain control of stock. Through practice

you will learn the proper depth of cut considering the

variables above.

9.6 Selecting SandSmart™ Feed

Rates

A faster feed rate allows faster sanding but fewer

revolutions of the drum per inch of sanding. A slower

feed rate provides more revolutions of the drum per

inch of sanding to allow a greater depth of cut and

smooth sanding.

Begin experimenting with the feed rate set at about

40% to 50% of maximum. The best feed rate will

depend on several factors, including type of stock,

grit and depth of cut used, and whether the stock is

fed directly in line with the conveyor table or at an

angle. If the drum motor is lugging down, if conveyor

belt is slipping, or if you observe a ripple effect on

the stock, slow the feed rate. If the finish is smooth

and the machine is not overworking, you can

experiment using a faster feed rate.

The SandSmart™ controller continuously monitors

the load on the drum motor, and automatically

regulates the speed of the conveyor motor to

maintain the highest feed rate without overload.

When the red indicator light (Figure 9-2) comes on,

the SandSmart™ control has detected too great a

depth of cut and/or too fast a feed rate.

Figure 9-2

If the load on the drum motor increases, the

SandSmart control will decrease the conveyor feed

rate and will stop the conveyor under extreme

conditions. If the load on the drum decreases,

SandSmart will increase the feed rate but will not

increase it faster than the manual setting on the

speed adjustment label.

The best and most consistent finish will be achieved

if the conveyor does not change speed during

operation.

A change in conveyor speed may affect the finish

surface. If the finish is affected, make another

sanding pass without changing any settings. If the

finish is still affected, adjust by slowing the conveyor

and/or decreasing the depth of cut and run the stock

through again.

Also try a faster feed rate, faster oscillation or less

depth of cut if the stock you are working begins to

show burn marks. With cherry, hard maple or other

hardwoods, using a shallower depth of cut and a

faster feed rate will help minimize burn marks.

Slightly angling the stock as it is fed into the machine

will also help prevent burning the stock.

Because of the wide range of variables, it is

important to experiment with your specific

conditions and adjust achieve the optimum feed

rate. If problems occur, first check and adjust the

feed rate, referring to the “Troubleshooting” section

in this manual.

9.7 Maximum Performance Tips

The versatility designed into the JWDS-1632OSC

drum sander allows it to be used for a variety of

tasks that will boost return on your investment. For

example, it will speed up fine sanding work often

done with slower, dust-generating hand sanders,

and will achieve fine thickness adjustments not

possible on some sanders. It can be used to surface

figured woods – bird’s eye or curly maple, for

example – which can be damaged if fed through a

planer.

Learning how to use its adjustments and controls

will allow you to fine-tune the machine for maximum

results. The best results come from experimenting

with different abrasive grits and machine

adjustments to fit the job at hand. Following is a list

of useful tips which can help you improve

performance of your sander.

9.7.1 Dust Collection

When connecting dust collectors, remember that

straight pipe will not restrict airflow as much as

flexible tubing. Y’s and elbows will restrict airflow

less than T’s. Also, a hose smaller than 2-1/2”

diameter should not be used.

9.7.2 Multiple-Piece Sanding Runs

When abrasive planing (or thickness sanding) a run

of similar pieces that you want to have the same

thickness, it is best to determine the thickness of the

thinnest piece and process all pieces to that same

thickness in one session. Be aware that the sander

will remove cups and crowns in the workpiece;

consider this when measuring and processing stock

to the same thickness.

9.7.3 Simultaneous Multiple Pieces

When sanding multiple pieces simultaneously,

make sure to stagger (step) the pieces across the

width of the conveyor belt. This provides better

contact with the tension rollers. Try to process only

multiple pieces of similar thickness.

If there is a significant thickness difference, the

thinner pieces can slip on the conveyor belt if they

do not contact the tension rollers. Also note that

pieces thicker than 3/4” should be longer than the

minimum normally recommended to prevent tipping

of the stock.

9.7.4 Edge Sanding

When edge sanding, the sander will mimic the

opposite edge of the stock which is lying on the

conveyor belt. Because of this, it is important for the

stock edge to have been ripped at the proper angle

to the face before the sanding process. When edge

sanding stock that is less than 3/4” wide or more

than 2” high, it is good procedure to stack and clamp

several pieces together to prevent them from

slipping or tipping on the conveyor belt.

9.7.5 Sanding Imperfect Stock

When sanding stock with a cup or crown, place the

crown up. This will stabilize the stock to help prevent

tipping or rocking during sanding. After the crown

has been removed and the top is flat, turn the stock

over and sand the opposite side. To avoid personal

injury, take special care when sanding stock that is

twisted, bowed, or otherwise varies in thickness

from end to end. If possible, support such stock as

it is being sanded to keep it from slipping or tipping.

Use extra roller stands, help from another person,

or hand pressure on the stock, to minimize

potentially hazardous situations.

9.7.6 Face Frames and Raised Panel

Doors

It is very important to have the proper abrasive

contact when doing this type of sanding. If the

machine is set to take an excessive depth of cut, the

result can be a gouge or dip as the drum goes from

sanding the rails at full width to sanding just a few

inches of width on the stiles. To prevent this, make

sure, when using abrasives finer than 80 grit, that

the drum is in contact with the wood but can still be

spun by hand. If there is room, angling the stock on

the conveyor belt can also help.

Slowing the conveyor feed when coming to a rail in

the stock can help prevent a dip or gouge. This

allows the abrasive to work the wider width with less

effort, and to achieve better consistency of the

finished surface.

9.7.7 Stock Feeding Angle

Some pieces, because of their dimensions, will

need to be fed into the machine at a 90° angle

(perpendicular to drum). However, even a slight

offset angle of stock will provide for more effective

stock removal. The optimum feeding angle for stock

removal is about 60°.

Angling the workpiece for stock removal provides

other advantages, such as less loading of certain

areas of the drum due to glue lines or mineral

streaks in the stock, more even wear of abrasive

strips, potentially faster feed rates, and lighter loads

on the motor. Note that to get the best final finish,

however, the stock should be fed through the

machine so it will be sanded in line with the grain of

the wood on the final one or two passes.

10.0 User-Maintenance

Before doing maintenance on

the machine, disconnect it from the electrical

supply (pull out the plug), unless indicated

otherwise. Failure to comply may cause serious

injury.

10.1 Cleaning and Lubrication

For best results, make cleaning the sander a regular

shop procedure. Allowing excess build-up of dust

and debris can adversely affect performance

through loading of the abrasives, slippage on the

conveyor table, and/or the accumulation of material

inside the drums which can throw off the center of

balance.

Leave the dust collector on when cleaning dust from

the drums. Also brush the conveyor belt after

cleaning operations. If not cleaned, the conveyor

belt could allow stock to slip during sanding

operations.

NOTE: Bearings are pre-sealed and require no

lubrication.

• Brush the conveyor belt after cleaning

operations. If not cleaned, the conveyor belt

could allow stock to slip during sanding

operations.

• Lubricate conveyor bushings as needed, and

check for wear.

• Lubricate elevating leadscrew (A, Figure 10-1)

as needed.

• Clean sawdust from abrasive strip and brush

dust from conveyor belt.

• Keep slide areas clean (B, Figure 10-1).

• Blow dust from motors and switches. Blow dust

from inside of sanding drum, which may cause

vibration or offset the center of balance. (Leave

your dust collector on when cleaning dust from

the drum.)

• Check all set screws for tightness on parts such

as bearings, conveyor table, and couplings.

Figure 10-1

10.2 Drum Maintenance

The drum should not require removal from the

machine under normal circumstances. Should

maintenance ever become necessary, the drum has

been designed for easy removal and replacement.

1. Remove the four oscillating motor mounting

screws (A) with a 5mm hex wrench (see Figure

10-2). Raise the motor straight up to disengage

the oscillating bearing (B) from the drum pulley

2. Grasp the drum and slide the assembly fully to

the left. This slides the glider (D) near the

opening of the coupling slot (E) (see Figure 10-

4).

3. Remove the four bearing housing mounting

screws (F) with a 6mm hex wrench (see Figure

10-5).

4. Raise the left end of the assembly while moving

the assembly to the left (sliding the glider out of

the coupling slot) and lift the drum assembly out

(see Figure 10-6).

Figure 10-2: Drum Removal

Figure 10-3: Drum Removal

Figure 10-4: Drum Removal

Figure 10-5: Drum Removal

Figure 10-6: Drum Removal

10.3 Conveyor Belt Replacement

5. Disconnect sander from power.

6. Raise drum to highest position.

7. Turn take-up screws (Figure 8-2) on both sides

of conveyor to relieve belt tension and slide the

driven roller fully inward.

8. Remove two (2) screws that attach conveyor

table to base.

9. Remove two (2) screws that attach conveyor

table to drum alignment bracket (E, Figure 10-

7).

10. Loosen two locks (F, Figure 10-7).

11. Lift conveyor table and remove it from machine.

Avoid tearing the belt on any edges underneath

the conveyor table. Do not allow the Trackers to

drop, as they may break.

12. Set conveyor on motor side and slide conveyor

belt off end of conveyor table.

13. Install new belt along with trackers (see sect.

11.0), and re-install conveyor table. Tension

and track the new belt.

Figure 10-7

Note: If conveyor belt continually tracks to one side

of the machine, reversing the belt on the conveyor

table may remedy the problem. To make sure the

conveyor table is not twisted, place a level on the

conveyor table. Level the machine if needed. If there

is still a problem, proceed with the steps below:

Step 1: Check conveyor drive roller and driven roller

to make sure they are parallel to surface of conveyor

table. To do this, first center conveyor belt on the

conveyor table. Then lay a straight edge on the

exposed edge of conveyor table on left (outboard)

side, extending it over the roller. Note distance

between roller and straightedge.

Step 2: Now repeat Step 1 on right (inboard) side of

conveyor. Compare the measurements from side to

side. If they are not equal, loosen one of the

brackets that hold the roller in place. Tip this bracket

until distance between roller and straight-edge are

equal from side to side, then tighten bracket.

10.4 Commutator Brush Inspection

To maintain motor efficiency, inspect the two carbon

brushes every two months, or more frequently if

sander is heavily used. Stalling or loss of power may

be a symptom of worn carbon brushes. If one brush

is worn out, replace both at the same time.

Continued use of damaged or

worn brushes may result in damage to motor

armature.

1. Unplug sander from power source.

2. Unscrew and remove cap with flat blade

screwdriver. See Figure 10-8.

3. Gently pry up an edge of the brass clip, until the

spring causes it to disengage from hole. (Notice

orientation of brush as you remove it; it should

be inserted in the same manner; curvature of

brush will match curvature of motor.)

4. Pull out brush and inspect. Brush should be

replaced if any of the following are discovered:

• Brush has worn to about 1/2-inch long.

• Signs of crumbling, burning, or breaking.

• End of brush is rough or pitted.

• Abnormal coloration of spring

• Broken lead in spring

• Collapsed spring

5. Install new brush (or reinstall current brush) and

gently press it all the way into hole until the

brass clip is secured.

6. Install cap.

7. Repeat for other brush.

NOTE: It is recommended that sander be run

without load for several minutes to seat new

brushes.

Figure 10-8

10.5 Additional Servicing

Any additional servicing should be performed by an

authorized service technician.

11.0 Tracker Kit

Stock No.: PM2244-213

Trackers dramatically reduce tracking adjustments

of conveyor belts. They are already installed on your

sander. The following information is for resetting or

replacing your trackers, should that become

necessary.

1. Disconnect power to sander.

2. Raise drum as high as it will go.

3. Turn both conveyor take-up screws to relieve

conveyor belt tension and slide driven roller fully

inward.

4. Remove the four bolts holding conveyor table to

sander base.

5. Lift conveyor table and slide it out of sander.

Turn conveyor table upside down. Be careful

not to damage conveyor belt.

6. On the underside of the conveyor table, there

are U-channels welded to the table. The

Tracker is positioned on the inside of the first U-

channel on the infeed side of sander (Figure 11-

1). The back of tracker is magnetized and will

stick to side wall of conveyor table. Do not install

tracker if edge of conveyor belt is damaged or

torn.

7. With first tracker installed, slide conveyor belt

into bottom slot of tracker. Note: When installed

properly, only bottom lip of tracker will be

visible. The top slot can be used if bottom slot

wears out.

8. Install second tracker opposite the first. Use

both trackers unless the second one does not

fit in conveyor or unless conveyor belt is

damaged.

9. Turn conveyor table right-side up and reposition

it onto sander. Re-attach three mounting

screws and tighten. Caution: Be careful not to

knock tracker(s) out of conveyor table when

turning conveyor over. Trackers may break if

allowed to fall.

10. Make sure all switches are off. Connect power

to sander and plug in motor.

11. Tension conveyor belt using take-up screws. If

both trackers are installed, it is very important to

have equal tension on both sides of conveyor

belt. Turn take-up screws on both sides until

equal tension is obtained.

12. To check tension, turn on conveyor full speed

and place both hands on conveyor. If conveyor

belt can be stopped, continue tensioning until

conveyor belt cannot be stopped by both hands

on the belt while conveyor is operating at full

speed.

13. Make sure conveyor belt runs smoothly inside

tracker slot and that the magnet is holding the

tracker in position.

14. Continue to watch tracking of conveyor and

adjust only if necessary, making sure to keep

equal tension on conveyor belt at all times and

not allowing conveyor belt to buckle under

conveyor table.

Figure 11-1: Underside of Conveyor Shown

12.0 Abrasives

The abrasive material you choose will have a

substantial effect on the performance of your

sander. Variations in paper type, weight, coating

and durability all contribute to achieving your

desired finish.

JET Abrasives are available in Ready-To-WrapTM

pre-cut lengths or in the convenient Ready-To-Cut

pre-marked box. Your JET dealer can recommend

the best choice for your application.

12.1 Selecting Drum Abrasives

It is important to select the proper grit of abrasive for

the type of sanding being performed to achieve

maximum results. As with any sanding operation,

first begin sanding with a coarser grit, depending

upon the roughness of the stock or the amount of

stock to be removed. Then progressively work

toward finer grits. The chart below shows the

general uses for the various grits.

The amount of stock to be removed is a major

consideration when choosing the grit grade with

which to begin. Grits 24, 36, 50 and 60 are primarily

designed for stock removal. Grits 24 and 36 will

remove the most material in one pass, whether you

are doing abrasive planing, cleaning up glued

panels, or flattening stock. Grits from 100 through

220 are primarily finishing grits designed to remove

the scratch pattern from the previous grit used. For

best results, never skip more than one grit grade

when progressing through a sanding sequence.

For fine work, such as furniture, try not to skip any

grit grades during the sanding process.

In general, premium quality abrasives will produce a

better finish with a less noticeable scratch pattern.

Note: Grits that are too fine can sometimes burnish

the wood and leave a glossy surface which will not

accept stains evenly. This will vary by type of wood.

Oak, for example, is susceptible to burnishing

because of its open pores.

12.2 Cleaning Abrasive Strips

Regularly clean the abrasive strip on the drum with

commercially available cleaning sticks, following the

manufacturer’s directions. When cleaning, also

brush the stick crumbs from the drum while it is still

rotating.

In some cases, heavy loaded areas can be removed

with Plexiglas held on edge over the rotating drum.

Always wear eye protection

while performing sandpaper cleaning. Take all

precautions to avoid any contact of hands or

clothing with the rotating drum.

Cloth-backed abrasives can be cleaned by soaking

in paint thinner or mineral spirits for 20 minutes to

one hour, then using a brush to remove any build-

up. Dry the abrasive strips completely before using.

Any used solvents should be discarded in

compliance with environmental regulations.

12.3 Increasing Abrasive Life

Abrasive life can be increased not only by cleaning,

but by removing the abrasive strip from the drum

and reversing it. To do this, remove the strip and use

what was the trailing end as the starting end on the

left (outboard) side of the drum. Reversing the strip

will provide a fresh set of cutting edges on the

abrasive.

12.4 Abrasive Selection Guide

Grit

Common Application

Abrasive planing, surfacing rough-sawn boards, maximum stock removal, glue removal.

Surfacing and dimensioning boards, truing warped boards

Surfacing and dimensioning boards, truing warped boards.

Light dimensioning, removal of planer ripples.

100

Light surfacing.

120

Light surfacing, minimal stock removal.

150

Finish sanding, minimal stock removal.

180

Finish sanding only, not for stock removal.

220

Finish sanding only, not for stock removal.

Table 2

Table of contents

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