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6
Malfunctions
6.1
Milling machine malfunctions
Malfunction
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
Earth leakage circuit breaker
trips
Rapid traverse in Z-axis does
not work.
Version 1.0.5 - 2021-01-29
Cause/
possible effects
•
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.
•
Optional MT4 taper is shrinked on
the Morse taper.
•
Defective fuse.
•
Circuit breaker
•
Upcut mill machining not possible
under the current operating
conditions.
•
Clamping lever of the movement
axes not tightened.
•
Loose collet chuck, loose drill
chuck, mechanical security tool
clamping system not engaged.
•
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
•
Not correct type of RCCB in
MH50V
•
End position of the axis reached.
•
Motor circuit breaker of drive has
tripped.
Translation of original instruction
Solution
•
Choose a different speed,
excessive 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
personnel.
•
Only for integrated machine
control. Press the red reset button
on the control unit in the control
cabinet.
•
Perform conventional milling.
•
Tighten the clamping lever.
•
Check, enable mechanical security
tool clamping system.
•
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.
•
Spindle quill feed on page 90
•
Clean, replace.
•
When the ELCB triggers on
page 85
•
Manually move the milling head
into the possible rapid traverse
travel range.
•
Do not operate the drive in
continuous operation (S6-60%)
MH50G│MH50V
EN
99
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