11
Common trouble problems and their Solutions
Symptom
Possible Cause
Possible Solution
Motor can not
start
1. The power supply is not on.
2. Low voltage.
3. Motor open circuit or loose
connection.
4. The external input socket is
broken.
5. May which switch is bad or
connect line loosen;
1. Turn on the emergency stop button
2. Check that the voltage of the power
supply is correct.
3. Check that all the connections of the
motor are loosened or disconnected.
4. Check and confirm the input socket is
ok.
5. Check switch and the connect lines is
tighten.
Fuse or circuit
breaker
disconnected
1. Wire or plug short circuit
2. Circuit board short circuit
3. Power supply fuse or circuit
breaker incorrect.
1. Check wires and plugs for damaged or
missing insulation and replace them with
extension wires.
2. Check the voltage of the power supply
is correct
3. Check that all connections of the motor
are loose or welded or insulated, and
replace the correct fuse or circuit breaker
in time
Motor
overheating
1. Motor overload
2. Air circulation of motor is
restricted
1. Reduce the load of motor
2. Clean the motor and ensure smooth
circulation of air
The hand wheel
of a transverse
or feed trawl is
too loose
1. The adjusting screw is not in
place.
2. Hand wheel loosened
3. Wire rod assembly old or not
in place
1. Tighten the adjusting screw and
lubricate the bed
2. Tighten the hand wheel knob
3. Tighten all loose knobs on the thread
rod assembly.
The machine
makes constant
noise
1. The gear or bearing is out of
order.
2. The motor is out of order.
1. Replace damaged gear or bearing
2. Replace motor
During
operation, the
machine stops
1. Drilling and milling too deep
2. The wrong speed or feed
speed was used in the drilling
and milling operation.
3. Milling cutter damage
4. Motor damaged
5. Gear damaged
1. Reduce drilling depth
2. Choose the right speed
3. Replacement milling cutter
4. Replacement motor
5. Replacement gear
Finish surface
difference
1. Speed or feed speed error
2. Milling cutter broken or
wrong selected
1. Change the milling cutter by adjusting
the correct speed or feed speed
2. Change the cutter
Difficult to move
the end part on
the guide rail
1. Drying of guideway
2. Z shaft hand wheel to tighten
3. Over compacted with debris
on guide rail
1. Lubricating oil
2. Adjusting screw
3. Cleaning guide
T - type nut is
difficult to fix
1. T type nut defect or damaged
2. T-groove on the wrong
working table
1. Replacement of type T nut
2. Replacement of table or well-used T
slot
