WM W-1902-P User manual

DUAL SIDE GRINDER
MADE IN THE U.S.A.
6-27-05
W-1902-P
OPERATORS MANUAL

W-1902-P QUAD DUAL SIDE GRINDER
Revised MAR. 2015
1
LIMITED WARRANTY
This machine is warranted against defects in workmanship and materials under normal use
and proper maintenance, for one year after date of purchase from WRIGHT MACHINE TOOL
CO. Any part which is determined to be defective in material or workmanship and returned
to WRIGHT MACHINE TOOL CO., shipping costs prepaid will be repaired or replaced, at
WRIGHT MACHINE TOOL CO. option.
WRIGHT MACHINE TOOL CO., INC PHONE [phone]
365 Palmer Avenue FAX [phone]
Cottage Grove, Oregon 97424
Contents
LIMITED WARRANTY........................................................................................................... 1
GENERAL SAFETY RULES.................................................................................................. 2
SPECIFICATIONS................................................................................................................. 4
OPTIONS .............................................................................................................................. 5
MAINTENANCE.....................................................................................................................6
PRE SET UP ......................................................................................................................... 7
CONTROL PANEL................................................................................................................. 8
MACHINE CONTROLS........................................................................................................11
LOADING SAW ................................................................................................................... 12
TOOTH GEOMETRY........................................................................................................... 14
CONVERSION CHART ....................................................................................................... 15
ELECTRICAL SCHEMATICS .............................................................................................. 16
PARTS LIST ........................................................................................................................ 22
INDEX.................................................................................................................................. 52

W-1902-P QUAD DUAL SIDE GRINDER
Revised MAR. 2015
2
GENERAL SAFETY RULES
Failure to follow the safety rules and other basic safety precautions, may result in seri-
ous injury.
Always use eye protection: When operating this machine, eye protection should be worn.
Grinding particles and the possibility of wheel breakage make eye protection necessary. Also
face or dust mask if operation is dusty. Use adequate ventilation.
Use ear protection: If operation is creating excessive noise.
Disconnect power: To machine when NOT in use.
Keep Clear: Of grinding wheels and pinch points when machine is running.
Don’t over reach: Keep proper footing and balance at all times.
Saws are sharp: Wear appropriate personal protective equipment when handling saw
blades.
Mounting of wheels: Should only be done by persons with mechanical aptitude and good
knowledge of mounting, care, and inspection of grinding wheels. Wheels must be rated for
the RPM of the machine.
Dress properly: Do not wear loose clothing or jewelry. Non-skid foot wear is recommended.
Wear protective hair covering to contain long hair.
Avoid dangerous environments: Don’t use in wet location. Keep work area well lit. Do not
use this machine in the presence of flammable liquid or gasses.
Keep children away: Do not let VISITORS contact this machine.
Keep work area clean: Cluttered areas invite accidents.

W-1902-P QUAD DUAL SIDE GRINDER
Revised MAR. 2015
3
GENERAL SAFETY RULES
(CONTINUED)
All electrical covers: Must be in place before applying electrical power to this machine.
Electrical service must be locked out prior to removing any electrical covers onr machine
guards. Access to electrical components must be restricted to trained personnel only to avoid
possible electrical shock.
Voltage greater: Than specified on name plate can result in serious injury to user.
Never stand on this machine: Serious injury could occur if the machine tipped or if the
grinding wheel is accidently contacted.
Follow safety precautions: For the wheels, coolant and material being ground. This infor-
mation is available on the Safety Data sheet for each of these products.

W-1902-P QUAD DUAL SIDE GRINDER
Revised MAR. 2015
4
SPECIFICATIONS
The W-1902 is designed to finish Grind the sides of band saws.
STANDARD VOLTAGE: 440 Volt, 3 Phase, 50/60 HZ
OPTIONAL VOLTAGE: As Requested
SHIPPING WEIGHT: 2,300 lbs
CRATE SIZE: L 83" X W 48" X H 60"
AIR REQUIREMENTS: 2 CFM at 80 psi
STANDARD SAW SIZE: 6" to 16"
OPTIONAL SAW SIZE: Down to 2"
SPINDLE MOTORS: (2) 1hp 3450 RPM Motors TEFC

W-1902-P QUAD DUAL SIDE GRINDER
Revised MAR. 2015
5
OPTIONS
Totalizer Counter W-70
Double Cuts Saw Carrier for Machine: W-1550
Short Band Saw Support Assembly: W-2083
Narrow Band Saw Carrier 2" to 6": W-2190
Sliver Tooth Saw Carrier (4 Required): W-2231-1
Stands: W-2259 Back Feed
W-2260 Back Stands
W-2262 Guide Stands
Double Cuts Saw Carrier for Back Stands: W-2265
COMMON REPLACEMENT PARTS
Coolant Nozzle W-1294
Feed Finger Assy W-2186-1

W-1902-P QUAD DUAL SIDE GRINDER
Revised MAR. 2015
6
The useful life of this machine can be dramatically extended if the following
rules of operation are followed.
1. Clean the machine regularly.
2. A good rust inhibiting coolant must be used in the correct ratio. Too weak a mix
will cause rust problems and too thick will damage the paint and
load the Diamond wheels.
3. Do not clean the machine with high pressure air or water. This can blow grit into the
internal parts of the machine and cause rusting problems which is not covered by
warranty.
MAINTENANCE
DAILY 1. Check coolant level and filter.
2. Clean exterior of machine.
3. Check hydraulic oil level. (periphery grinder)
WEEKLY 1. Check coolant tank for carbide buildup.
2. Replace coolant filters.
MONTHLY 1. Grease index linear bearing.
or 100,000 CYCLES 2. Inspect feed finger for wear.
3. Inspect clamp jaws for wear.
4. Inspect roller hold down bearings.
EVERY 6 MONTHS 1. Clean motor fan.
or 500,000 CYCLES 2. Remove stainless splash guards and clean completely.
3. Inspect index system linear slide bearing assembly for
excessive clearance.

W-1902-P QUAD DUAL SIDE GRINDER
Revised MAR. 2015
7
PRE SET UP
COOLANT
Coolant capacity is 7 to 10 gallons. A rust inhibiting grinding coolant MUST be used or severe
rust damage to machine can result. Mix coolant according to manufacturer’s instructions.
Coolant pump plugs into female receptacle on back door of the machine.
RUST DAMAGE IS NOT COVERED BY THE WARRANTY
MOUNTING GRINDING WHEELS
All grinding wheels must be rated for the RPM of this machine. Wheels exposed
to higher than rated RPM are dangerous.
Mounting of the grinding wheel should only be done by persons with mechanical aptitude
and good knowledge of mounting, care, and inspection of grinding wheels.
STYLE OF GRINDING WHEELS
FINISHING WHEELS
B-35-6 6" X 1/8"X 1-1/4" 2 Required
GRINDING WHEELS MUST BE RATED FOR 5000 RPM OR THE RPM OF YOUR
MACHINE.
NOTE: Power must be disconnected to machine when changing Grinding Wheels.
To change Grinding Wheels remove wheel guards, use 1/8" allen wrench to remove screws
that hold the wheel nut in place.

W-1902-P QUAD DUAL SIDE GRINDER
Revised MAR. 2015
8
CONTROL PANEL
A
BCD
E
F
G
W-735-TW
W-735-TW W-195
W-1427-1
W-194
W-1011
W-1004

W-1902-P QUAD DUAL SIDE GRINDER
Revised MAR. 2015
9
CONTROL PANEL
A. Control Joy Switch has 5 positions. Left for side #2 (Manual Finish Head In only), right for
side #1 (Manual Rough In only), down for Automatic #1 (Rough Grind only) up is for Automatic
#2 (Rough and Finish Grind only.) Machine must be running for these controls to work.
B. Saw Up / Saw Down only function when saw clamp is open. Index Forward / Reverse
only function when saw clamp is closed and machine is not running.
C. Tooth Counter only counts in the Automatic #2 position.
D. The Load Meter monitors the power required to grind with the periphery Heads. The Load
Meter is set by accessing the SET and the HYS screens.
The meter controls the set point which is a nominal amp draw with no grind load. The hystersis
is what established the amp draw during the grind, which suspends forward grind motion if
the Finish Head hits a tooth that is wider than expecxted, this load meter will slow the speed
as necessary to reduce the chance of wheel or saw damage.
E. Pull to start - Push to stop.
F. Indicator light shows power to machine.
G. Open position - Opens saw clamp jaws. Run position - Closes clamp jaws and allows the
machine to be started. When machine is not in use turn to Off position.

W-1902-P QUAD DUAL SIDE GRINDER
Revised MAR. 2015
10
LOAD METER

W-1902-P QUAD DUAL SIDE GRINDER
Revised MAR. 2015
11
MACHINE CONTROLS (top view)
1. Depth of grind Finish Head.
2. Adjusts the start of the slow speed.
3. Control Console.
4. In-Feed knobs (2).
5. Band Saw hold downs (2).
SETTING INDEX PITCH
To set Index Tooth Pitch, adjust index pitch lead screw using index pitch scale for tooth spac-
ing.
1 HP MOTOR
1 HP MOTOR
3
5
5
2
1
4
4
SAW CLAMP
1 2 3 4
INDEX PITCH
LEAD SCREW
INDEX PITCH SCALE

W-1902-P QUAD DUAL SIDE GRINDER
Revised MAR. 2015
12
LOADING SAW
1. Turn Switch (G) to Open. Move Saw carrier Down by moving Switch (B) to Saw Down.
2. Place saw in carrier track. Move Switch (B) to Saw Up. As saw is traveling up through
the Clamp Jaws, make certain that the Index Fingers are over a gullet. Otherwise the fingers
and saw tooth may be damaged.
HANDS MUST BE KEPT CLEAR OF PINCH POINTS DURING THIS OPERATION
3. The band saw is in the proper position when the tooth is 1/8" above the Index Finger.
NOTE: The more accurate the height is set, less variation in Kerf will be experi-
enced. If the tooth is placed higher a wider Kerf will occur. If lower, a narrower Kerf
will occur.
1/8"

W-1902-P QUAD DUAL SIDE GRINDER
Revised MAR. 2015
13
LOADING SAW
SET UP (CONTINUED)
4. Tighten Band Saw Hold Down at each end of the Saw Clamp Bar. If too tight the index will
not be able to slide back, and if too loose the band saw will lift up when indexing.
5. After making sure the Index Finger is in the gullet, turn Switch (G) to Run. This will close
the Clamp Jaws. Move Joy Switch (B) to the left until a tooth passes the Index Finger. Then
allow Joy Switch (B) to return to center position.
6. At this time a saw tooth should be against the Index Fingers. If the index stroke is insuf-
ficient, adjust as shown on page 10
7. Set Tooth Counter (C) on the number of teeth to be ground.
8. Place Joy Switch (A) in center position, pull Start button.
9. After coolant flow is on tip, place Joy Switch (A) into Automatic #1.
10. The grinding head will travel down and grind a tooth. Set speed and stroke as neces-
sary.
11. Adjust In-Feed knobs as necessary on the grinding head to achieve desired finish kerf
width. Set speed and stroke as necessary.

W-1902-P QUAD DUAL SIDE GRINDER
Revised MAR. 2015
14
TOOTH GEOMETRY
The W-1904 is set at what we consider AVERAGE tooth angles when it leaves
our factory.
FINISH HEAD
30 Degree Hook - 8 Degree Back 3 Degree Tangential 3 Degree Radial
TANGENTAL
RADIAL

W-1902-P QUAD DUAL SIDE GRINDER
Revised MAR. 2015
15
TOOTH GEOMETRY
FINISH HEAD
30 Degree Hook - 8 Degree Back 3 Degree Tangential 3 Degree Radial
INCREASE RADIAL ANGLE VS TANGENTAL ANGLE
Loosen bolts that attach head to base and rotate head using adjustment bolt.
INCREASE RADIAL AND TANGENTAL ANGLE
Loosen feed finger tower bolts and move tower to the right to increase both
angles. Move tower to the left to decrease angles. Rotating head clockwise
increases radial angle and decreases tangental angle. Rotating head counter-
clockwise increases tangental angle and decreases radial angle.
GRINDING HEAD
HEAD ADJUSTMENT BOLT
HEAD ATTATCHMENT BOLT
LESS RADIAL
MORE TANGENTAL
MORE RADIAL
LESS TANGENTAL

W-1902-P QUAD DUAL SIDE GRINDER
Revised MAR. 2015
16
CONVERSION CHART
DEGREES OF ANGLE CONVERTED TO DROP OFF IN THOUSANDTHS X DISTANCE.
To convert degrees to thousandths, select degrees required on line (A). Example:
3.5 degrees. On line (B) select length of measurement. Example: .375 for a 3/8 tip.
Where 3.5 degrees and .375 intersect is drop off in thousandths of an inch.
Line (A) .5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6
.125 1 2 3 4 5 6 7 8 9 10 11 12
.250 2 4 7 9 11 13 15 18 20 22 24 26
.312 3 5 8 11 14 16 19 22 25 27 30 33
.375 3 7 10 13 16 20 23 26 30 33 36 39
.437 4 8 11 15 19 23 27 30 34 38 42 46
.500 4 9 13 17 22 26 31 35 39 44 48 52
Line (B)
TANGENTAL ANGLE
FRONT TO BACK
RADIAL ANGLE
TOP TO BOTTOM

W-1902-P QUAD DUAL SIDE GRINDER
Revised MAR. 2015
17
ELECTRICAL SCHEMATICS

W-1902-P QUAD DUAL SIDE GRINDER
Revised MAR. 2015
18
ELECTRICAL SCHEMATIC

W-1902-P QUAD DUAL SIDE GRINDER
Revised MAR. 2015
19
ELECTRICAL SCHEMATIC
110V
440V
12
440V
3 PH.
FINISH
MS1
L1 T1
L2 T2
L3 T3
L1
L2
L3
T1
T2
T3
ROUGH
MS 2
MTT
7,4
9,6
8,5
2
3
1
3
2
1
7,4
9,6
8,5
7,4
9,6
8,5
8,5
9,6
7,4
3
2
1
3
2
1
LM
1 2