Version 1.1.1 - 2021-1-2560 Translation of original instruction
MB4
EN
MB4_GB_7.fm
7 Malfunctions
7.1 Milling machine malfunctions
Malfunction
Cause/
possible effects
Solution
Milling machine cannot be
switched on
• Power-on sequence not observed. • Switching on the drilling-mill-
ing machine on page 26
• Have it checked by qualified per-
sonnel.
Tool "burnt". • Incorrect speed.
• Chips are not coming out of the
drilled hole.
• Blunt tool.
• Operating without cooling agent.
• Choose a different speed, exces-
sive feed.
• Withdraw the tool more frequently.
• Sharpen or replace tool.
• Use coolant.
Taper cannot be inserted in
quill.
• Remove any dirt, grease or oil
from the internal conical surface of
the spindle sleeve or the taper.
• Clean surfaces well.
Keep surfaces free from grease.
The taper cannot be pushed
out.
• MT4 taper is shrinked on the
Morse taper.
• Let the machine run at highest
speed for two minutes to warm it
up and attempt to remove the
taper again.
Motor does not start. • Defective fuse. • Have it checked by qualified per-
sonnel.
Rattle the spindle if the
workpiece surface is rough.
• 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.
• 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.
Fine feed of the spindle
sleeve does not work
• Fine feed is not correctly activated.
• Coupling of the fine feed does not
cam-in, is soiled, blurred, worn,
defective
•
Manual spindle sleeve feed
with the fine feed on page 31
• Clean, replace.
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