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Verfügbare Sprachen
Verfügbare Sprachen
6
Malfunctions
Malfunction
Machine does not turn on
Feed will stop
Surface of workpiece too rough
V-belt squeaks
V-belt slips Lathe chuck stops.
Workpiece becomes conical
Lathe rattles
Centering point runs hot
Lathe tool has a short service
life
Flank wear too high
Cutting edge breaks off
Turned thread is wrong
EN
TU2807VB
154
Cause/
possible effects
•
Position switch lathe chuck protec-
tion switches the machine off.
•
Position switch protection cover
headstock machine switches off
•
Emergency stop switch activated
•
Cutting force too high
•
Shear pin of the leading spindle torn
off.
•
Lathe tool blunt
•
Lathe tool springs
•
Feed too high
•
Radius at lathe tool tip too small
•
V-belt wear down
•
V-belt tension is too loose
•
Cutting force during turning too high
•
Centre are not aligned (tailstock off-
set)
•
Top slide is not exactly set to zero
(when turning with the top slide)
•
Feed too high
•
Spindle bearings have too much
clearance.
•
Workpiece has expanded
•
Cutting speed too high
•
For large infeed
•
Insufficient cooling
•
Clearance angle too small (lathe tool
"pushes")
•
Lathe tool tip not adjusted to centre
height
•
Wedge angle too small (heat buildup)
•
Grinding cracks due to improper
cooling
•
Excessive play in the spindle bear-
ings (oscillations occur)
•
Lathe tool is clamped incorrectly or
grinding has been started the wrong
way
•
Wrong pitch
•
Wrong diameter
Translation of original instruction
Solution
•
Check position switch lathe chuck
protection, adjust
•
Check or adjust the position switch of
protective cover headstock.
•
Unlock the emergency stop switch
•
Reduce cutting force
•
Replace shear pin.
•
Resharpen lathe tool
•
Clamp lathe tool with less overhang
•
Reduce feed
•
Increase radius
•
Tighten the V-belt on page 113
•
Reduce cutting force, if necessary
improve torque by changing the V-
belt position.
•
Align the tailstock to the center
•
Align the top slide exactly
•
Select smaller feed rate.
•
Readjust spindle bearing
Spindle bearing on page 152
•
Loosen tailstock center
•
Reduce cutting speed
•
Lower delivery / finishing stock allow-
ance not over 0.5 mm)
•
More cooling
•
Increase clearance angle
•
Correct height adjustment of the
lathe tool
•
Set greater wedge angle
•
Cool uniformly
•
Adjust the clearance in the spindle
bearing arrangement.
bearing on page 152
•
Set the lathe tool to the centre, grind
angle correctly
Use 60° lathe tool for metric threads,
55° lathe tool for inch thread
•
Adjust right pitch
•
Turn the workpiece to the correct
diameter
Version 1.0 - 2020-12-22
Spindle
Malfunctions
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