Optimum OPTImill MH 25V, Operating Manual

Page: 78 / 100

OPTIMUM
M A S C H I N E N - G E R M A N Y
Version 1.0.1 dated 2015-12-17 Page 78 Original operating instructions
MH25V GB
6 Malfunctions
6.1 Milling machine malfunctions
Malfunction
Cause/
possible effects
Solution
Milling machine cannot be
switched on • Power-on sequence not observed. •

"Resetting an emergency stop
situation“ on page 67.
•

"Power failure, Restoring
readiness for operation“ on page
67
•

"Switching the milling machine
on“ on page 67
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. • Taper sleeve has shrunk onto the
cone. • Let the machine run at highest
speed for two minutes to warm it
up and attempt to remove the
taper again.
•

"Removal“ on page 69
Motor does not start. • Defective fuse. • Have it checked by qualified per-
sonnel.
Rattle the spindle if the work-
piece 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,
drawbar 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.