Malfunctions; Milling Machine Malfunctions - Optimum OPTimill MH 35G Operating Manual

7

Malfunctions

7.1

Milling machine malfunctions

Malfunction
Tool "burnt".
Taper cannot be inserted in
quill.
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
Version 1.1.0 - 2020-08-07
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.
• Screwed pull stud?
• Defective fuse.
• Circuit breaker
• Upcut mill machining not possible
under the current operating condi-
tions.
• 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
• EMC filter in the frequency con-
verter. Not correct type of RCCB in
MH35V
Translation of original instruction
Solution
• 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.

• Pull stud on page 19
• Have it checked by qualified per-
sonnel.
• 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 36
• Clean, replace.

• When the ELCB triggers on
page 31
MH35G│MH35V EN
77