OPTIMUM
MASCHINEN - GERMANY
Version 1.3.0 dated 2016-12-16Page 70 Original operating instructions
MF2 VarioGB
7 Malfunctions
7.1 Malfunctions on the multi-milling machine
Malfunction Cause/
possible effects
Solution
Noise during work. Spindle turning dry
Tool blunt or incorrectly secured
Grease spindle
Use new tool and check securing (fixed
setting of the bit, bit-holder and conical
chuck).
Tool "burnt". Incorrect speed.
Chips do not come out of the bore
hole
Tool blunt.
Operating without cooling agent.
Select another rate, feed too high.
Retract tool more often during work
Sharpen or replace tool.
Use cooling agent
Tool running off-centre
or "hopping"
Tool deformed
Bearings worn down in the spindle
head
Tool badly secured
Defective clamping chuck
Replace tool
Have the bearings in the spindle head
replaced
Secure the tool properly
Replace the clamping chuck
Impossible to insert grip
cone into the spindle
sleeve
Remove any dirt, grease or oil from
the internal conical surface of the
spindle sleeve or the grip cone.
Clean surfaces well
Keep surfaces free of grease.
Motor does not start Motor is wrongly connected
Defective fuse
Have it checked by authorised personnel.
Motor is overheating and
there is no power
Motor overloaded
Insufficient mains voltage
Motor badly connected
Reduce feed, disconnect if necessary
and have it checked by authorised
personnel
Have it checked by authorised personnel
Precision of the work
deficient
Heavy and unbalanced or
deformed work-piece
Inexact horizontal position of the
work-piece holder
Balance the piece statically and secure
without straining
Adjust workpiece-holder
Spindle bearing
overheating
Bearing worn down
Bearing pretension is too high
Working at high speeds for a long
time
Replace
Reduce bearing clearance in the fixed
bearing
Reduce feed rate
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