Section 7: Service; Troubleshooting - Grizzly G0894 Owner's Manual

SECTION 7: SERVICE

Review the troubleshooting procedures in this section if a problem develops with your machine. If you need
replacement parts or additional help with a procedure, call our Technical Support. Note: Please gather the
serial number and manufacture date of your machine before calling.
Motor & Electrical
Symptom Possible Cause
Machine does not 1. E-Stop button depressed/at fault.
start, or power
supply breaker 2. Incorrect power supply voltage or circuit
immediately trips size.
after startup. 3. Power supply circuit breaker tripped or fuse
blown.
4. Computer board at fault.
5. Wiring broken, damaged, or disconnected.
6. Inverter/control box at fault.
7. Motor at fault.
Machine stalls or is 1. Dull cutter or incorrect cutter type for task.
underpowered.
2. Machine undersized for task.
3. Spindle jammed.
4. Spindle motor overheated.
5. Incorrect power supply voltage or circuit
size.
Machine has 1. Incorrect feed rate, spindle speed, or cutter
vibration or noisy type.
operation. 2. Cutter or spindle at fault.
3. Workpiece loose.
4. Bit chattering.
5. Collet at fault.
6. Machine not level.
7. Spindle bearings at fault.
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Troubleshooting

Possible Solution
1. Rotate E-Stop button head to reset. Replace if at
fault.
2. Ensure correct power supply voltage and circuit
size.
3. Ensure power supply circuit is not overloaded and is
free of shorts. Reset circuit breaker or replace fuse.
4. Inspect/replace if at fault.
5. Fix broken/damaged wires or disconnected/
corroded connections.
6. Inspect inverter/controller box; replace if at fault.
7. Test/repair/replace.
1. Replace/sharpen cutter. Use proper cutter for
cutting task.
2. Use correct cutter/reduce feed rate or depth of cut.
3. Disconnect power. Turn spindle by hand to identify/
fix cause of jam.
4. Check coolant, fill reservoir (Page 33).
5. Ensure correct power supply voltage and circuit
size.
1. Use correct feed rate and spindle speed; use
different cutter.
2. Replace or sharpen cutter; tighten loose spindle;
replace defective spindle, collet, or spindle nut
(Page 25).
3. Secure workpiece with clamps (Page 26).
4. Replace/sharpen cutter; index cutter to workpiece;
use correct feed rate and spindle speed.
5. Replace collet.
6. Level machine (Page 18).
7. Test by rotating spindle; rotational grinding/loose
shaft requires bearing replacement.
Model G0894 (Mfd. Since 05/19)