Grizzly G0935 Owner's Manual page 42

Motor & Electrical (Cont.)
Symptom Possible Cause
Spindle depth 1. Battery is dead.
DRO does not
2. Spindle depth DRO at fault.
give reading.
3-axis DRO 1. Wiring broken, disconnected, or corroded.
does not give
reading/reading
2. X-, Y-, or Z-axis sensor(s) at fault.
is incorrect.
3. 3-axis DRO at fault.
Spindle speed 1. Spindle speed dial stripped.
will not display,
2. Wiring broken, disconnected, or corroded.
adjust, or is
inconsistent.
3. Potentiometer at fault.
4. Spindle speed sensor at fault.
5. Spindle speed DRO at fault.
FWD/OFF/REV 1. Headstock cover is removed, E-STOP button
switch does not
is pressed, or machine in "FAULT" mode
work.
(fault indicator light is illuminated).
2. Wiring broken, disconnected, or corroded.
Machine has 1. Machine incorrectly mounted to floor.
vibration or
2. Workpiece loose.
noisy operation.
3. Bit is chattering.
4. Excessive depth of cut.
5. Motor or component loose.
6. Belt worn, loose, pulleys misaligned or belt
slapping cover.
7. Pulley loose.
8. Motor mount loose/broken.
9. Spindle loose, improperly installed, or
damaged.
10. Chuck or cutter at fault.
11. Spindle bearings at fault.
12. Motor bearings at fault.
Headstock will 1. Headstock locked.
not raise or
2. Z-axis limit switch engaged.
lower.
3. Wiring broken, disconnected, or corroded.
4. Z-axis limit switch(es) at fault.
5. Z-axis jog button(s) at fault
-40-
Possible Solution
1. Replace battery (Page 38).
2. Replace DRO.
1. Fix broken wires or disconnected/corroded
connections.
2. Replace sensor(s).
3. Replace DRO.
1. Replace dial.
2. Fix broken wires or disconnected/corroded
connections.
3. Test/replace potentiometer.
4. Replace sensor.
5. Replace DRO.
1. Install headstock cover or reset E-STOP button to
clear fault then select FWD or REV.
2. Fix broken wires or disconnected/corroded
connections.
1. Tighten mounting hardware, or shim.
2. Use correct holding fixture and reclamp workpiece.
3. Replace/sharpen bit; index bit to workpiece; use
appropriate cutting RPM (Page 31).
4. Decrease depth of cut.
5. Replace damaged or missing bolts/nuts or tighten if
loose.
6. Inspect/replace belt (Page 31). Realign pulleys if
necessary.
7. Secure pulley on shaft.
8. Tighten/replace.
9. Tighten loose spindle, re-install spindle ensuring
mating surfaces are clean, replace spindle if damaged.
10. Replace unbalanced chuck; replace/resharpen cutter;
use correct depth of cut.
11. Test by rotating spindle; rotational grinding/loose shaft
requires bearing replacement.
12. Test by rotating shaft; rotational grinding/loose shaft
requires bearing replacement.
1. Loosen headstock lock handle (Page 28).
2. Headstock travel limit has been reached. Re-configure
operation so it requires less headstock travel.
3. Fix broken wires or disconnected/corroded
connections.
4. Replace limit switch(es).
5. Replace jog button(s).
Model G0935 (Mfd. Since 04/21)