Craftex CX706, User Manual, Page: 24 / 42

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TROUBLESHOOTING
Problem Possible Reason Elimination
Surface of workpiece too Tool blunt Resharpen tool
rough Tool springs Clamp tool with less overhang
Feed too high Reduce feed
Radius at the tool tip too small Increase radius
Workpiece becomes coned Centers are not aligned (tailstock has
offset)
Adjust tailstock to the center
Top slide not aligned well (cutting with
the top slide)
Align top slide well
Lathe is chattering Feed too high Reduce feed
Slack in main bearing Adjust the main bearing
Center runs hot Workpiece has expanded Loosen tailstock center
Tool has a short edge Cutting speed too high Reduce cutting speed
life Crossfeed too high Lower crossfeed(finishing allowance
should not exceed 0.5mm)
Insufficient cooling More coolant
Flank wear too high Clearance angle too small Increase clearance angle
Tool tip not adjusted to center high Correct height adjustment of the tool
Cutting edge breaks off Wedge angle too small (heat build-up) Increase wedge angle
Grinding crack due to wrong cooling Cool uniformly
Excessive slack in the spindle bearing Adjust the slack in the spindle bearing
Arrangement (vibrations) arrangement
Cut thread is wrong Tool is clamped incorrectly or has Adjust too to the center
been started grinding the wrong way Grind angle correctly
Wrong pitch Adjust the right pitch
Wrong diameter Turn the workpiece to the correct
diameter
Spindle does not activate Emergency stop switch activated Unlock emergency stop switch