41
TROUBLE PROBABLE
CAUSES
REMEDY
Bending on long workpiece
cutting.
1. Feed value too large.
2. Workpiece too thin or too long.
Reduce feed value.
Use follow rest to support and adjust tool
position.
Failure on products accuracy.
Accuracy fails on machine.
(Ref. to inspection record)
Recheck the accuracy of machine and
adjust.
Uneasy to hold change levers.
Set spring broken or too weak.
Adjust set screw or replace the spring.
Misalignment of chuck with
spindle nose.
Incorrect position of cam.
Adjust the cam and lock it in proper
position.
1. Excess clearance of leadscrew in
Adjust the thrust nut at the end of
axial direction.
leadscrew.
2. Excess clearance on carriage or
Adjust the gib.
cross-slide.
3. Worn thread or nut in cross-slide.
Adjust the backlash or replace it.
4. Worn leadscrew or halfnut.
Replace it.
5. Worn end gear or incorrect engagement
Replace or adjust the end gear.
Uneasy to cut thread.
6. Bent leadscrew.
Straighten it.
7. Incorrect threading tool and wrong
Replace threading tool and reset it.
positioning.
8. Incorrect engage the halfnut.
Engage the halfnut exactly.
9. Threading dial indicator not properly
Adjust the indicator engagement on
engaging with leadscrew.
leadscrew.
10. Too much infeed per cut or too fast
Reduce the infeed per cut or spindle
spindle speed.
speed.
Tailstock clamp not stable.
The ecentric clamping height too long or too
short.
Adjust the nut on clamp bolt.
Failure on foot brake.
1. Badly worn brake shoes.
2. Fails on controlled limit switch.
Replace brake shoes.
Adjust the limit switch position or
replace it.
1. The half-nut lever not disengage at all.
Disengage half-nut lever exactly.
Failure on power feeding.
2. Feeds change lever incorrect positioning.
3. The safety latch and interlock pin failure.
Push-in or pull-out the lever exactly.
Replace the safety latch or interlock pin.
Fail lubricant on slide way.
Oilers obstructed by dirty or damaged
Replace the oilers.
