OPTIMUM
MASCHINEN - GERMANY
Version 3.1.8 dated 2015-1-27 Page 49Original operating instructions
BF20V US
7 Troubleshooting
7.1 Troubleshooting the mill drill
Malfunction
Cause/
possible consequences
Solution
The mill drill does not start
• Start sequence not followed. • "Switching on the mill drill“ on
page 25
• Have it checked by authorised staff.
Tool "burnt“.
• Incorrect speed.
• The chips have not been removed
from the bore hole.
• Tool blunt.
• Operating without cooling agent.
• Select another speed, feed too high.
• Retract tool more often
• Sharpen and replace tool.
• Use coolant.
Impossible to insert holding
taper into the spindle
sleeve.
• Remove any dirt, grease or oil from
the internal conical surface of the
spindle sleeve or the holding taper.
• Clean surfaces well.
Keep surfaces free of grease.
Taper cannot be removed
• Optional MT3 taper seat shrunk on
morse cone.
• Have the machine heat-up at highest
speed for about two minutes and
then try again to disassemble the
taper.
Motor does not start
• Defective fuse • Have it checked by authorised staff.
Working spindle rattling on
rough workpiece surface
• Climb milling machining not possible
under the current operating condi-
tions.
• Clamping lever of the movement
axes not tightened.
• Loose collet chuck, loose drill chuck,
loose draw-in rod.
• Tool blunt.
• Workpiece is not fixed.
• Excessive slack in bearing.
• Working spindle goes up and down.
• Perform conventional milling.
• Tighten clamping lever
• Check, retighten.
• Sharpen or replace tool
• Secure the workpiece properly.
• Readjust bearing slack or replace
bearing.
• Readjust bearing slack or replace
bearing.
Fine feed of spindle sleeve
does not work
• Fine feed is not correctly activated
• Clutch of the fine feed does not
engage, is dirty, smeared, worn or
defective
• "Manual spindle feed with the
fine feed“ on page 30
• Clean, replace
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