Grizzly H8178 User manual
MODEL H8178 POWER FEED
OWNER'S MANUAL
COPYRIGHT © OCTOBER, 2007 BY GRIZZLY INDUSTRIAL, INC.
WARNING: NO PORTION OF THIS MANUAL MAY BE REPRODUCED IN ANY SHAPE
OR FORM WITHOUT THE WRITTEN APPROVAL OF GRIZZLY INDUSTRIAL, INC.
#CR10064 PRINTED IN CHINA
Model H8178 Power Feed -1-
Table of Contents
INTRODUCTION ............................................... 2
Foreword ........................................................ 2
Contact Info ................................................... 2
Machine Data Sheet ...................................... 3
SECTION 1: SAFETY ....................................... 4
Safety Instructions for Machinery .................. 4
Additional Safety for Power Feeds ................ 6
SECTION 2: CIRCUIT REQUIREMENTS ........ 7
110V Operation .............................................. 7
SECTION 3: SETUP ......................................... 8
Setup Safety .................................................. 8
Unpacking ...................................................... 8
Items Needed for Setup ................................. 8
Inventory ........................................................ 9
Installation ...................................................... 9
SECTION 4: OPERATIONS ........................... 14
Operation Safety .......................................... 14
Power Feed Controls ................................... 14
SECTION 5: ACCESSORIES ......................... 15
SECTION 6: MAINTENANCE ......................... 16
Schedule ...................................................... 16
Brush Replacement ..................................... 16
SECTION 7: SERVICE ................................... 17
About Service .............................................. 17
Troubleshooting ........................................... 17
Electrical Components ................................. 18
Wiring Diagram ............................................ 20
Parts Breakdown ......................................... 21
Notes ............................................................ 22
WARRANTY AND RETURNS ........................ 25
-2- Model H8178 Power Feed
INTRODUCTION
Foreword
We are proud to offer the Model H8178 Power
Feed. This machine is part of a growing Grizzly
family of fine metalworking machinery. When
used according to the guidelines set forth in this
manual, you can expect years of trouble-free,
enjoyable operation and proof of Grizzly’s com-
mitment to customer satisfaction.
The specifications, drawings, and photographs
illustrated in this manual represent the Model
H8178 when the manual was prepared. However,
owing to Grizzly’s policy of continuous improve-
ment, changes may be made at any time with no
obligation on the part of Grizzly.
For your convenience, we always keep current
Grizzly manuals available on our website at www.
grizzly.com. Any updates to your machine will be
reflected in these manuals as soon as they are
complete. Visit our site often to check for the lat-
est updates to this manual!
If you have any comments regarding this manual,
please write to us at the address below:
Grizzly Industrial, Inc.
C/O Technical Documentation Manager
P.O. Box 2069
Bellingham, WA 98227-2069
Email: [email protected]
We stand behind our machines. If you have any
service questions or parts requests, please call or
write us at the location listed below.
Grizzly Industrial, Inc.
1203 Lycoming Mall Circle
Muncy, PA 17756
Phone: (570) 546-9663
Fax: (800) 438-5901
E-Mail: [email protected]
Web Site: http://www.grizzly.com
Contact Info
Model H8178 Power Feed -3-
Machine Data Sheet
Product Dimensions:
Weight............................................................................................................................................13 lbs.
Width/Depth/Height................................................................................................7.75"W x 7.5"D x 5"H
Electrical:
Switch................................................................................................................. Dual Micro Limit Switch
Power Supply Voltage......................................................................................................................110V
Cord Length....................................................................................................................................... 7 ft.
Cord Gauge...............................................................................................................................18 gauge
Recommended Breaker Size...................................................................................................... 15 amp
Plug........................................................................................................................................NEMA 5-15
Power Supply.......................................................................................................110VAC, Single-Phase
Circuit Board Protection.............................................................................................................Fuse, 5A
Automatic Motor Overload Protection.....................................Circuit Board Controlled Motor Shutdown
Motor Control....................................................................................................Circuit Board w/Rheostat
Rapid Feed Speed Option............................................................................................Yes, Push Button
Feed Speed Range..........................................................................................................0-1100 mm/min
Motor:
Type..........................................................................................................Class E, Brush-Type 110VDC
Horsepower.....................................................................................................................................0.2 HP
Amps..................................................................................................................................................1.8A
Watts..............................................................................................................................................1500W
Speed.......................................................................................................................................4000 RPM
Cycle................................................................................................................................................60 Hz
Power Transfer ..............................................................................................Gearbox w/All Steel Gears
Bearings....................................................................Bushing and Permanently Lubricated Ball Bearing
MODEL H8178 POWER FEED FOR
MODEL G0463 & G0619 MILL/DRILLS
-4- Model H8178 Power Feed
4. ALWAYS USE HEARING PROTECTION
WHEN OPERATING MACHINERY.
Machinery noise can cause permanent
hearing damage.
5. WEAR PROPER APPAREL. DO NOT
wear loose clothing, gloves, neckties, rings,
or jewelry which may get caught in moving
parts. Wear protective hair covering to con-
tain long hair and wear non-slip footwear.
6. NEVER OPERATE MACHINERY WHEN
TIRED, OR UNDER THE INFLUENCE OF
DRUGS OR ALCOHOL. Be mentally alert
at all times when running machinery.
1. READ THROUGH THE ENTIRE MANUAL
BEFORE STARTING MACHINERY.
Machinery presents serious injury hazards
to untrained users.
2. ALWAYS USE ANSI APPROVED
SAFETY GLASSES WHEN OPERATING
MACHINERY. Everyday eyeglasses only
have impact resistant lenses, they are
NOT safety glasses.
3. ALWAYS WEAR AN ANSI APPROVED
RESPIRATOR WHEN OPERATING
MACHINERY THAT PRODUCES DUST.
Wood dust is a carcinogen and can cause
cancer and severe respiratory illnesses.
For Your Own Safety, Read Instruction
Manual Before Operating this Machine
The purpose of safety symbols is to attract your attention to possible hazardous conditions. This
manual uses a series of symbols and signal words which are intended to convey the level of
importance of the safety messages. The progression of symbols is described below. Remember
that safety messages by themselves do not eliminate danger and are not a substitute for proper
accident prevention measures.
Indicates a potentially hazardous situation which, if not avoided,
MAY result in minor or moderate injury. It may also be used to alert
against unsafe practices.
Indicates a potentially hazardous situation which, if not avoided,
COULD result in death or serious injury.
Indicates an imminently hazardous situation which, if not avoided,
WILL result in death or serious injury.
This symbol is used to alert the user to useful information about
proper operation of the machine.
NOTICE
Safety Instructions for Machinery
SECTION 1: SAFETY
Model H8178 Power Feed -5-
7. ONLY ALLOW TRAINED AND PROP-
ERLY SUPERVISED PERSONNEL TO
OPERATE MACHINERY. Make sure
operation instructions are safe and clearly
understood.
8. KEEP CHILDREN AND VISITORS AWAY.
Keep all children and visitors a safe dis-
tance from the work area.
9. MAKE WORKSHOP CHILD PROOF. Use
padlocks, master switches, and remove
start switch keys.
10. NEVER LEAVE WHEN MACHINE IS
RUNNING. Turn power OFF and allow all
moving parts to come to a complete stop
before leaving machine unattended.
11. DO NOT USE IN DANGEROUS
ENVIRONMENTS. DO NOT use machin-
ery in damp, wet locations, or where any
flammable or noxious fumes may exist.
12. KEEP WORK AREA CLEAN AND WELL
LIT. Clutter and dark shadows may cause
accidents.
13. USE A GROUNDED EXTENSION CORD
RATED FOR THE MACHINE AMPERAGE.
Undersized cords overheat and lose power.
Replace extension cords if they become
damaged. DO NOT use extension cords
for 220V machinery.
14.
ALWAYS DISCONNECT FROM POWER
SOURCE BEFORE SERVICING
MACHINERY. Make sure switch is in
OFF
position before reconnecting.
15. MAINTAIN MACHINERY WITH CARE.
Keep blades sharp and clean for best and
safest performance. Follow instructions for
lubricating and changing accessories.
16. MAKE SURE GUARDS ARE IN PLACE
AND WORK CORRECTLY BEFORE
USING MACHINERY.
Safety Instructions for Machinery
17. REMOVE ADJUSTING KEYS AND
WRENCHES. Make a habit of checking for
keys and adjusting wrenches before turn-
ing machinery ON.
18. CHECK FOR DAMAGED PARTS
BEFORE USING MACHINERY. Check
for binding and alignment of parts, broken
parts, part mounting, loose bolts, and any
other conditions that may affect machine
operation. Repair or replace damaged
parts.
19. USE RECOMMENDED ACCESSORIES.
Refer to the instruction manual for recom-
mended accessories. The use of improper
accessories may cause risk of injury.
20. DO NOT FORCE MACHINERY. Work at
the speed for which the machine or acces-
sory was designed.
21. SECURE WORKPIECE. Use clamps or
a vise to hold the workpiece when practi-
cal. A secured workpiece protects your
hands and frees both hands to operate the
machine.
22. DO NOT OVERREACH. Keep proper foot-
ing and balance at all times.
23. MANY MACHINES WILL EJECT THE
WORKPIECE TOWARD THE OPERATOR.
Know and avoid conditions that cause the
workpiece to "kickback."
24. ALWAYS LOCK MOBILE BASES
(IF USED) BEFORE OPERATING
MACHINERY.
25. BE AWARE THAT CERTAIN DUST MAY
BE HAZARDOUS to the respiratory sys-
tems of people and animals, especially
fine dust. Make sure you know the hazards
associated with the type of dust you will be
exposed to and always wear a respirator
approved for that type of dust.
-6- Model H8178 Power Feed
Additional Safety for Power Feeds
1. UNDERSTANDING CONTROLS. Make sure
you understand the use and operation of all
power feed controls.
2. SAFETY ACCESSORIES. Always wear your
safety glasses when using the power feed.
3. WORK HOLDING. Before starting the power
feed, be certain the workpiece has been
properly clamped to the table. NEVER hold
the workpiece against the table by hand dur-
ing power feed operations.
4. SPINDLE SPEEDS. Select the spindle speed
that is appropriate for the type of work and
material. Allow the mill/drill to gain full speed
before beginning a power feed operation.
5. POWER DISRUPTION. In the event of a
local power outage when using the power
feed, turn OFF all switches to avoid possible
sudden start up once power is restored.
6. BE ATTENTIVE. DO NOT leave the area for
any reason during any power feed opera-
tion.
7. DISCONNECT POWER. Unplug the power
feed from power before starting any inspec-
tion, adjustment, or maintenance procedure.
8. MACHINE CARE AND MAINTENANCE.
Never operate the power feed if the table is
out of adjustment, is damaged, or has worn
parts. Maintain your mill/drill in proper work-
ing condition. Perform routine inspections
and maintenance promptly. Put away adjust-
ment tools after use.
9. AVOIDING ENTANGLEMENT. Keep loose
clothing articles such as sleeves, belts or jew-
elry items away from the table handwheels,
and moving parts.
10. CLEAN-UP. DO NOT clear chips by hand, or
blow off with compressed air. Use a brush,
and never clear chips while the power feed is
operating.
11. CUTTING TOOL INSPECTION. Inspect end
mills for sharpness, chips, or cracks before
beginning a power feed operation. Replace
dull, chipped, or cracked cutting tools imme-
diately. Handle new cutting tools with care.
Leading edges are very sharp and can cause
lacerations.
12. EXPERIENCING DIFFICULTIES. If at any
time you are experiencing difficulties per-
forming the intended operation, stop using
the machine! Contact our Technical Support
at (570) 546-9663.
No list of safety guidelines can be complete. Every shop environment is different. Like all
machines there is danger associated with the Model H8178. Accidents are frequently caused by
lack of familiarity or failure to pay attention. Use this machine with respect and caution to lessen
the possibility of operator injury. If normal safety precautions are overlooked or ignored, serious
personal injury may occur.
Model H8178 Power Feed -7-
Figure 1. A 5-15 plug and receptacle.
Serious personal injury could occur if you
connect the machine to the power source
before you have completed the set up pro-
cess. DO NOT connect the machine to the
power source until instructed to do so.
110V Operation
Amperage Draw
The Model H8178 motor draws the following
amps under maximum load:
Motor Draw ........................................... 1.8 Amps
Circuit Recommendations
We recommend connecting your machine to a
dedicated and grounded circuit that is rated for
the amperage given below. Never replace a circuit
breaker on an existing circuit with one of higher
amperage without consulting a qualified electri-
cian to ensure compliance with wiring codes. If
you are unsure about the wiring codes in your
area or you plan to connect your machine to a
shared circuit, consult a qualified electrician.
Circuit Breaker .......................................15 Amps
Plug/Receptacle Type
Included Plug Type ........................... NEMA 5-15
This machine must have a ground prong in
the plug to help ensure that it is grounded.
DO NOT remove ground prong from plug
to fit into a two-pronged outlet! If the plug
will not fit the outlet, have the proper outlet
installed by a qualified electrician.
Extension Cords
We do not recommend the use of extension
cords, if you find it absolutely necessary:
• Use at least a 14 gauge cord that does not
exceed 50 feet in length!
• The extension cord must also contain a
ground wire and plug pin.
• A qualified electrician MUST size cords over
50 feet long to prevent motor damage.
SECTION 2: CIRCUIT REQUIREMENTS
Electrocution or fire could
result if this machine is
not grounded correctly or
if your electrical configu-
ration does not comply
with local and state codes.
Ensure compliance by
checking with a qualified
electrician!
-8- Model H8178 Power Feed
The Model H8178 was carefully packed when it
left our warehouse. If you discover the machine
is damaged after you have signed for delivery,
please immediately call Customer Service at
(570) 546-9663 for advice.
Save the containers and all packing materials for
possible inspection by the carrier or its agent.
Otherwise, filing a freight claim can be difficult.
When you are completely satisfied with the con-
dition of your shipment, you should inventory the
contents.
Wear safety glasses dur-
ing the entire set up pro-
cess!
This machine presents
serious injury hazards
to untrained users. Read
through this entire manu-
al to become familiar with
the controls and opera-
tions before starting the
machine!
Unpacking
Setup Safety
SECTION 3: SETUP
Items Needed for
Setup
The following items are needed to complete the
setup process, but are not included with your
machine:
Tools & Hardware Needed: Qty
• Wrench 10mm ............................................ 1
• Center Punch ............................................. 1
• Power Drill .................................................. 1
• Drill Bit (#25) .............................................. 1
• Bottoming Tap (#10-24) .............................. 1
• Flat Head Screws (#10-24 x 1/2") .............. 2
• Hex Wrench (3mm) .................................... 1
• Hex Wrench (4mm) .................................... 1
• Hex Wrench (5mm) .................................... 1
• Phillips Screwdriver (#1) ............................ 1
• Phillips Screwdriver (#2) ............................ 1
• Flat Tip Screwdriver (#2) ............................ 1
• Flat Metal File (10") .................................... 1
• Small Hammer ............................................ 1
• Dowel Punch 1/8" ....................................... 1
• Medium Workbench Vise .......................... 1
Model H8178 Power Feed -9-
Inventory
After all the parts have been removed from the
crate, you should have the following items shown
in Figure 2:
Contents Qty
A. Limit Switch Assembly ............................... 1
B. Power Feed Unit ......................................... 1
C. Power Cord ................................................. 1
D. Left and Right Feed Stops ....................1 Ea
E. Cap Screws M6-1 x 16 (Power Feed) ........ 2
In the event that any nonproprietary parts are
missing (e.g. a nut or a washer), we would be
glad to replace them, or for the sake of expedi-
ency, replacements can be obtained at your local
hardware store.
Figure 2. Inventory.
B
C
E
D
A
Installation
These instructions cover the power feed instal-
lation for the Grizzly Model G0463 and G0619
small mill/drills. Follow these steps carefully, and
your power feed installation should be quick and
trouble free.
To install the power feed:
1. DISCONNECT THE MILL FROM POWER!
2. Loosen the gib screw lock nuts (Figure 3),
and adjust the X-axis table gib screws, so the
table moves with slight resistance as felt in
the handwheel.
Note: Make your adjustments on all four
locations equally and in small increments.
Figure 3. X-axis gib adjustment.
3. When properly adjusted, tighten the lock
nuts.
-10- Model H8178 Power Feed
4. Locate the X-axis lead screw half-nut (see
Figure 4).
5. Adjust both cap screws until the handwheel
has approximately 0.003" backlash as shown
by the dial.
Figure 4. X-axis leadscrew backlash
adjustment.
Lead
Screw
Lead Screw Half-Nut
Milling Table
6. Use the #1 Phillips screwdriver to remove the
four flat head screws from both ends of the
power feed.
7. Carefully slide the motor and mounting plate
from the housing a few inches as shown in
Figure 5.
8. Carefully slide the circuit board and vent
cover from the housing a few inches as
shown in Figure 5.
Figure 5. Power feed breakdown.
Figure 6. Cap removal.
10. Use a 5mm hex wrench, remove the two end
plate retaining cap screws (Figure 6).
11. Thread the cap screws into the power feed
mounting holes (Figure 7), and in an alternat-
ing fashion, tighten the screws to remove the
table end plate.
Figure 7. End plate removal.
Half-Nut Cap Screws
Circuit Board Motor and Mounting Plate
9. Using a standard screwdriver, pry the
leadscrew dust cap off (Figure 6).
End Plate
Retaining
Cap Screw
Model H8178 Power Feed -11-
15. Using soft jaws, secure the end plate in a vise
with the painted surface facing up (Figure
10).
Figure 10. End plate surface preparation.
Soft Jaw
Figure 11. Bushing bore preparation.
12. On both tapered pins, measure and record
the amount of pin protrusion from the face of
the end plate (Figure 8).
Figure 8. Pin protrusion.
13. Using a hammer, and working from the inside
out as shown in Figure 9, drive both wedge
pins from the end plate.
DO NOT attempt to take a short cut and ham-
mer the protruding pins flush with the end
plate cover. The pins are tapered and you
WILL crack the end plate.
Figure 9. Pin removal.
File this portion of the
tapered pin, so when it
is reinstalled, the pin is
slightly recessed below
the surface of the end
cap.
14. Using a file or bench grinder, shorten the
pins, so they are recessed slightly below the
face when reinstalled.
Face
16. Using a 10" or longer flat metal file, remove
any high spots in the paint and give the end
cap a flat surface for the power feed to mate
with.
Note: We do not recommend removing the
paint completely, just ensure that the surface
is flat.
17. Using a standard screwdriver, scrape away
any paint from the bushing bore (Figure 11),
so when the power feeder is mounted, the
bushing sits properly in the bore without bind-
ing.
-12- Model H8178 Power Feed
18. Reinstall the end plate, and drive the tapered
pins in (Figure 12), so they are slightly
recessed in the end plate face.
Figure 12. Pin reinstallation.
21. Carefully slide the circuit board and vent
cover back into the power feed housing
(Figure 14), but do not install the four mount-
ing screws at this time.
The circuit board and vent cover must be left
loose so you can insert the motor into the
case without pinching or crushing wires.
19. Rotate the power feed drive tang so it aligns
with the lead screw slot (Figure 13).
Figure 13. Motor installation.
Tang
Must
Align
with Lead
Screw
Slot
End
Plate
Figure 14. Circuit board installation.
22. Being careful not to crush or bind the circuit
board wires, slide the power feed housing
onto the end of the motor (Figure 15).
Do not force the housing onto the motor. You
may have to reposition the circuit board and
vent cover during this process to avoid motor
and circuit board wire interference.
Figure 15. Final assembly.
Wires Must be Kept Clear
When Sliding the Motor Into
the Power Feed Housing.
23. Secure the vent cover and the mounting plate
to the power feed housing with the eight pre-
viously removed flat head screws removed in
Step 6.
20. Place the power feed motor onto to the end
plate, and secure the power feed motor to
the end plate with the two M6-1 x 16mm cap
screws.
Model H8178 Power Feed -13-
28. Using your electric drill, drill one #25 mount-
ing hole 1/2" deep into the table base.
29. Using a #10-24 bottoming tap, cut threads
into the hole.
30. Secure the limit switch mounting plate to the
table base with one #10-24 x 1/2" flat head
screw.
31. Center punch the other hole and drill, tap,
and install the remaining screw.
32. Install the limit switch to the mounting plate
with the three previously removed screws.
33. Secure the power and limit switch power
cables away from the path of the moving
table and handwheels.
26. Install the limit switch mounting plate on the
side of the milling table base so the limit
switch stop pins are horizontally aligned with
the stop pins as shown in Figure 17.
Also make sure that when mounted, the limit
switch housing has enough of a gap (also
shown in Figure 17) between the gib screw
lock nut so it can be adjusted.
27. When the mounting plate is properly posi-
tioned, center punch one mounting hole.
Figure 17. Alignment specifications.
Limit Switch
Housing
Stop
Pin
Gap
Limit Switch
Stop Pin
24. Install the left and right feed stops into the
table slot shown in Figure 16.
Note: You may want to additionally drill and
insert a roll pin to prevent any chance of a
stop block inadvertently moving past the stop
setting. If the stop moves past your maximum
stop setting, the lead screw will run out of
thread and slam the table and power feed to
a hard stop causing possible damage.
Figure 16. Feed stop and optional pin location.
25. Using a phillips screwdriver, remove the three
mounting screws that secure the limit switch
to its mounting plate.
Optional Roll Pin Installation
Location at Either End of Table
NOTICE
Make sure to position the left and right
stops so that the table can travel an addi-
tional 10mm before the leadscrew runs out
of thread. The reason for this additional
table travel is that after using the rapid feed
feature, the momentum of the motor arma-
ture keeps rotating leadscrew so the table
moves a few millimeters past your normal
stop location. If the lead screw runs out of
travel before the table naturally slows to a
stop, a damaging hard stop will occur.
Periodically, make sure that you always
have the appropriate table free travel past
the stop setting to prevent damaging hard
stops.
-14- Model H8178 Power Feed
Operation Safety
SECTION 4: OPERATIONS
Loose hair and cloth-
ing could get caught in
machinery and cause seri-
ous personal injury. Keep
loose clothing and long
hair away from moving
machinery.
If you have never used this type of machine
or equipment before, WE STRONGLY REC-
OMMEND that you read books, trade maga-
zines, or get formal training before begin-
ning any projects. Regardless of the con-
tent in this section, Grizzly Industrial will
not be held liable for accidents caused by
lack of training.
Figure 18. Power feed controls.
Power Feed Controls
Refer to the list below and see Figure 18 to
understand the power feed controls.
A. Green Power Lamp: When lit, it indicates
that the power feed has power.
B. Orange Fault Lamp: When lit, it indicates
that you must reset the power feed because
the circuit board has either detected a motor
overload, or you have changed feed direc-
tion. Turn the feed speed dial to zero and
move the feed direction lever to center. The
lamp will then go out and the power feed is
ready to use again.
C. Feed Direction Lever: Move the lever left or
right from the center position to select table
travel direction.
D. Feed Speed Dial: Slowly rotate this dial to
select a feed speed and begin a feed opera-
tion. When finished with an operation, turn
the feed speed dial to zero, and move the
feed lever to the center position.
E. Rapid Feed Button: Push and hold the rapid
feed button to quickly move the table in the
selected direction.
F. Fuse: Protects circuits from power surge.
C D
B A F
E
Always disconnect power
from the power feed when
not in use. Failure to do
this may result in power
feed damage.
NOTICE
Model H8178 Power Feed -15-
SECTION 5: ACCESSORIES
ACCESSORIES
H8179—Horizontal Milling Table
Take advantage of the Model G0619 mill/drill 90°
tilting headstock feature. Install this lifted cast-iron
horizontal milling table for the correct clearance
when making those side-milling operations.
G9002—21⁄2" Swivel Base Milling Vise
G5971—31⁄2" Swivel Base Milling Vise
G5972—4" Swivel Base Milling Vise
G5973—5" Swivel Base Milling Vise
G5974—6" Swivel Base Milling Vise
G5975—8" Swivel Base Milling Vise
Vises feature 360° rotation with fine graduations,
drop forged handle, precision ground jaw faces,
enclosed acme screw and detachable swivel
base.
Figure 21. Swivel base milling vise.
H8177—Worktable with Angle
Enjoy having an economical way to support your
workpiece at an array of angles. This high-quality
tilting worktable is quick and easy to setup and
use.
Figure 20. Worktable with angle.
Figure 19. Horizontal milling worktable.
H8179
Figure 22. H5685 4" Rotary Table.
H5685—4" Rotary Table
The perfect rotary table for all you model makers
and those doing smaller precision work. Comes
with clamping kit.
-16- Model H8178 Power Feed
SECTION 6: MAINTENANCE
Always disconnect power
to the machine before
performing maintenance.
Failure to do this may
result in serious person-
al injury.
For optimum performance from your power feed,
follow this maintenance schedule and refer to any
specific instructions given in this section.
Daily Check:
• Loose mounting screws.
• Table, leadscrews, and ways are clean and
lubricated.
• Worn or damaged wires.
• Power feed stops are secured and properly
adjusted to prevent a table crash or "hard
stops."
Monthly Check:
• Gibs are adjusted properly.
• Oil power feed stop pins (Figure 23).
Annual or Biannual Check:
• Lubricate headstock lead screw and gears.
Schedule
Figure 23. Power feed stop pin lubrication.
Power Feed Stop Pin
Brush Replacement
During the life of your power feeder, you may have
to replace the brush set if the unit loses RPM or
becomes noisy. This is a simple task and only
takes a few minutes.
Tools Needed: Qty
Standard Screwdriver (#3) ................................ 1
Needle Nose Pliers ............................................ 1
To replace the brushes:
1. DISCONNECT MACHINE FROM POWER!
2. Unscrew the power feed top dust cap (Figure
24).
Figure 25. Brush components.
Brush
Retaining
Cap
Brush
Bore
Motor
Brush
Dust
Cap
Figure 24. Top dust cap location.
Dust Cap
3. Unscrew the brush retaining cap, use needle
nose pliers to replace the brush, and reinstall
the caps (Figure 25).
4. Replace the remaining brush at the underside
of the power feed.
Model H8178 Power Feed -17-
Review the troubleshooting and procedures in this section to fix your machine if a problem develops. If you
need replacement parts or you are unsure of your repair skills, then feel free to call our Technical Support
at (570) 546-9663.
SECTION 7: SERVICE
About Service
Symptom Possible Cause Possible Solution
Power feed will not turn on or move
the table.
1. Power cord is faulty.
2. Power lamp is not lit and fuse has
blown.
3. Fault lamp is lit.
4. Limit switch is stuck open.
5. Motor brush is at fault.
6. Feed direction switch is at fault.
7. Feed speed rheostat is at fault.
8. Circuit board is at fault.
9. Gearbox is at fault.
10. Motor is at fault.
1. Check all electrical connections, and
repair or replace wires or connections
as required.
2. Correct short and replace the fuse.
3. Reset the power feed by moving the
feed direction lever to the center position
and turning the feed speed dial to 0.
4. Replace limit switch assembly.
5. Replace brush set (Page 15).
6. Replace switch.
7. Replace rheostat.
8. Replace circuit board.
9. Replace motor and gearbox assy.
10. Replace motor and gearbox assy.
Power feed moves table at inconsis-
tent speeds during a pass.
1. Table gib is binding table.
2. Leadscrew is binding.
3. Motor brush is at fault.
4. Feed speed rheostat is at fault.
5. Circuit board is at fault.
6. Gearbox is at fault.
7. Motor is at fault.
1. Clean, lubricate, and adjust table gib.
2. Clean, lubricate, and adjust leadscrew.
3. Replace brush set.
4. Replace switch.
5. Replace circuit board.
6. Replace motor and gearbox assy.
7. Replace motor and gearbox assy.
Power feed works only in one direc-
tion.
1. Wiring at fault.
2. Feed direction switch at fault.
3. Limit Switch is at fault.
4. Circuit board is at fault.
1. Tighten loose connection, or repair wir-
ing.
2. Replace feed direction switch.
3. Replace limit switch assembly.
4. Replace circuit board.
Poor surface finish, or vibration when
milling with power feed.
1. Table feed rate or cutter speed at
fault.
2. Cutter at fault.
3. Loose table.
4. Loose headstock.
5. Power feed gearbox at fault.
1. Slow feed rate, recalculate cutter speed.
2. Sharpen or replace cutter, or use correct
cutter.
3. Adjust gibs, lead screws, and tighten Y-
axis gib lock.
4. Tighten Z-axis gib and spindle locks.
5. Replace motor and gearbox assy.
Troubleshooting
-18- Model H8178 Power Feed
Electrical Components
Note: Available in color online at grizzly.com
Figure 28. Circuit board.
Figure 26. Control panel electrical.
Figure 27. Limit switch assembly.
Rapid Feed
Switch
Fuse Housing
Power
Lamp
Fault
Lamp
Table of contents
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