TROUBLE SHOOTI NG
HOLZMANN Maschinen Austria www.holzmann-maschinen.at
Seit e 4 2
Metalldrehmaschine / metal turning lathe ED 750 FDQ
2 0 TROUBLE SHOOTI NG
Disconnect the m achine from the pow er supply prior to any checks perform ed
at the m achine itself !
Trouble Possible Reason Solution
Surface of workpiece too
rough
Tool blunt Resharpen tool
Tool springs Clamp tool with less overhang
Feed too high Reduce feed
Radius at the tool tip too small Increase radius
Workpiece becomes co-
ned
Centers are not aligned (tail-
stock has offset)
Adjust tailstock to the center
Top slide not aligned well (cut-
ting with the top slide)
Align top slide well
Lathe is chattering
Feed too high Reduce feet
Slack in main bearing Adjust the main bearing
Centers runs hot Workpiece has expanded Loosen tailstock center
Tool has a short edge life
Cutting speed too high Reduce cutting speed
Cross feed too high Lower crossfeed (finishing al-
lowance 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 Arrangement (vibra-
tions)
Adjust the slack in the spindle
bearing arrangement
Cut thread is wrong
Too is clamped incorrectly or has
been started grinding the wrong
way
Adjust to the center
Grind angle correctly
Wrong pitch Adjust the right pitch
Wrong diameter Turn the workpiece to the cor-
rect diameter
Spindle does not activate Emergency stop switch activated
Unlock emergency stop switch
To Next Page
Loading...
