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troubleshooting
section 7: service
review the troubleshooting and procedures in this section to fix or adjust your machine if a problem devel-
ops. if you need replacement parts or you are unsure of your repair skills, then feel free to call our technical
support at (570) 546-9663.
motor & electrical
symptom
possible Cause
Machine does not
1. plug/receptacle is at fault or wired
start or a breaker
incorrectly.
trips.
2. Motor connection wired incorrectly.
3. Wall fuse/circuit breaker is blown/tripped.
4. power supply switched off or is at fault.
5. Wiring is open/has high resistance.
6. Main power switch is at fault.
7. Motor is at fault.
Machine stalls or is
1.
overloaded.
2.
3.
4.
5.
6.
7.
8.
9.
10. spindle rotation switch at fault.
11. Motor is at fault.
-30-
troubleshooting
Feed rate/cutting speed too fast for task.
Workpiece alignment is poor.
Wrong cutter type.
Motor connection is wired incorrectly.
V-belt(s) slipping.
plug/receptacle is at fault.
Motor bearings are at fault.
Machine is undersized for the task.
Motor has overheated.
possible solution
1. test for good contacts; correct the wiring.
2. Correct motor wiring connections.
3. ensure circuit size is suitable for this machine;
replace weak breaker.
4. ensure power supply is switch on; ensure power
supply has the correct voltage.
5. Check for broken wires or disconnected/corroded
connections, and repair/replace as necessary.
6. replace faulty FWd/oFF/reV switch.
7. test/repair/replace.
1.
decrease feed rate/cutting speed.
2.
eliminate workpiece binding; use jig or clamps and
position table properly for workpiece alignment
control.
3.
use cutter with correct properties for your type of
machining.
4.
Correct motor wiring connections.
5.
replace bad V-belt(s).
6.
test for good contacts; correct the wiring.
7.
test by rotating shaft; rotational grinding/loose shaft
requires bearing replacement.
8.
use smaller sharp cutters/drill bits; reduce the feed
rate; reduce the spindle rpM; use cutting fluid if
possible.
9.
Clean off motor, let cool, and reduce workload.
10. test/repair/replace switch.
11. test/repair/replace motor.
g3358 Milling/drilling Machine
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