Spindle Bearing Break-In - Grizzly G0935 Owner's Manual

29. Confirm that table stops moving when table
limit stop presses against limit switch.
— If fault indicator light illuminates and power
feed stops, power feed limit switch is
working correctly. Proceed to Step 30.
— If fault indicator does not illuminate, or
power feed does not stop, fault indicator
light or power feed limit switch is not work-
ing correctly. Immediately turn machine
OFF and disconnect power. Contact Tech
Support before continuing with Test Run.
30. Move direction switch to neutral (middle)
position and turn speed control dial all the
way counterclockwise.
— If power feed operates as expected accord-
ing to Controlling Table Travel section,
beginning on Page 27, congratulations!
Test Run is complete. Continue to perform
the Spindle Bearing Break-In procedure.
— If power feed does not operate as expect-
ed, immediately stop machine, disconnect
it from power, and fix problem BEFORE
operating machine. Troubleshooting
table in the SERVICE section of this man-
ual can help.
Spindle Bearing
Break-In
You must complete this procedure to main-
tain the warranty. Failure to do this could
cause rapid wear-and-tear of spindle bear-
ings once they are placed under load.
The spindle break-in procedure distributes lubri-
cation throughout the bearings to reduce the risk
of early bearing failure if there are any "dry" spots
or areas where lubrication has settled in the bear-
ings. You must complete this procedure before
placing operational loads on the spindle for the
first time when the machine is new or if it has
been sitting idle for longer than 6 months.
Model G0935 (Mfd. Since 04/21)
Always start the spindle break-in at the lowest
speed to minimize wear if there are dry spots.
Allow the spindle to run long enough to warm up
and distribute the bearing grease, then incremen-
tally increase spindle speeds and repeat this pro-
cess at each speed until reaching the maximum
spindle speed. Following the break-in procedure
in this progressive manner helps minimize any
potential wear that could occur before lubrication
is fully distributed.
To break in spindle bearing:
1. Reset E-STOP button so machine can start.
2.
Turn FWD/OFF/REV switch to FWD (see
Figure 21) to run spindle in forward direction.
Spindle
Speed
Tachometer
Spindle
Speed Dial
FWD/
OFF/REV
Switch
Spindle
Figure 21. Controls for spindle bearing break-in
procedure.
2. Rotate spindle speed dial clockwise to turn
machine ON, then set spindle speed at 100
RPM. Run for 10 minutes in forward direc-
tion. Turn spindle speed dial completely
counterclockwise to stop spindle, turn FWD/
OFF/REV switch to REV, and run spindle in
reverse at 100 RPM for 10 minutes.
Note: Switching spindle rotation from FWD
to REV without allowing spindle to come to a
complete stop will result in FAULT mode and
possible damage to machine. Always turn
spindle speed dial completely counterclock-
wise and allow spindle to come to a complete
stop before changing spindle direction.
3. Repeat the previous step at spindle speeds
of 280, 2500, and 5000 RPM. Be sure to run
the spindle for a minimum of 5 minutes in
each direction of rotation at each speed.
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