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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.
Symptom
Motor will not start.
Feed handle tapping button
does not work.
Poor surface finishes.
Vibration when running or cutting.
Headstock lift motor struggles
to lift headstock.
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Troubleshooting
Possible Cause
1. Emergency stop button is pressed.
2. Chip guard switch at fault.
3. Main power switch at fault.
4. Blown electrical box fuse .
5. Blown inverter fuse.
6. Shorted capacitor.
7. Shorted transformer.
8. Open circuit in motor or loose
connections.
1. Machine is not in "Tapping Mode."
2. Tapping button slip ring switch is
at fault.
3. General electrical problem.
1. Feed rate too fast.
2. Dull cutter.
3. Lock not tightened down.
4. Gibs loose.
1. Feed rate too high.
2. Loose table.
3. Loose gibs.
1. Headstock lock or gib is at fault.
2. Headstock lead screw is binding.
3. Motor or bearings at fault.
Possible Solution
1. Reset switch or replace bad switch.
2. Fully close chip guard, or replace
bad switch.
3. Turn dial on, or replace bad switch.
4. Repair for overload and install a
new fast-blow fuse.
5. Repair for overload and install a
new fast-blow fuse.
6. Replace both capacitors.
7. Replace transformer.
8. Inspect circuit boards, wiring
connections, plugs, and repair/
replace as required.
1. Move the mode switch to the
tapping position.
2. Replace tapping button slip ring
switch.
3. Inspect circuit boards, wiring
connections, plugs, and repair/
replace as required.
1. Slow feed rate.
2. Always use newly sharpened cutters.
3. Tighten column and table locks
when possible to maintain rigidity.
4. Adjust gib.
1. Slow feed rate or adjust RPM.
2. Tighten table locks.
3. Adjust gib.
1. Loosen/replace lock lever and
adjust gib.
2. Clean and relubricate headstock
leadscrew and gears.
3. Replace motor or offending bearings.
Model G0720R (Mfg. Since 11/10)
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