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6
Malfunctions
6.1
Milling machine malfunctions
Malfunction
Milling machine cannot be
switched on
Tool "burnt".
Taper cannot be inserted in
quill.
The taper cannot be pushed
out.
Motor does not start.
Rattle the spindle if the
workpiece surface is rough.
Fine feed of the spindle
sleeve does not work
EN
MB4
80
Cause/
possible effects
•
Power-on sequence not observed.
•
Incorrect speed.
•
Chips are not coming out of the
drilled hole.
•
Blunt tool.
•
Operating without cooling agent.
•
Remove any dirt, grease or oil
from the internal conical surface of
the spindle sleeve or the taper.
•
MT4 taper is shrinked on the
Morse taper.
•
Defective fuse.
•
Upcut mill machining not possible
under the current operating condi-
tions.
•
Clamping lever of the movement
axes not tightened.
•
Loose collet, loose drill chuck,
draw-in rod loose.
•
Tool is blunt.
•
The workpiece is not fastened.
•
Excessive slack in bearing.
•
Spindle moves up and down.
•
Fine feed is not correctly activated.
•
Coupling of the fine feed does not
cam-in, is soiled, blurred, worn,
defective
Translation of original instruction
Solution
•
Switching on the drilling-mill-
ing machine on page 68
•
Have it checked by qualified per-
sonnel.
•
Choose a different speed, exces-
sive feed.
•
Withdraw the tool more frequently.
•
Sharpen or replace tool.
•
Use coolant.
•
Clean surfaces well.
Keep surfaces free from grease.
•
Let the machine run at highest
speed for two minutes to warm it
up and attempt to remove the
taper again.
•
Have it checked by qualified per-
sonnel.
•
Perform conventional milling.
•
Tighten the clamping lever.
•
Check, re-tighten.
•
Sharpen or renew the tool.
•
Clamp the workpiece firmly.
•
Readjust the bearing slack or
replace the bearing.
•
Readjust the bearing slack or
replace the bearing.
•
Manual quill feed with the fine
feed on page 72
•
Clean, replace.
Version 1.0.1 - 2021-11-18
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