Malfunctions - Optimum Optimill MT 50 Operating Manual

8

Malfunctions

Malfunction
Noise during work
Tool "burnt".
Bit tip moves, bore is not
circular
Tool running off-centre
or "hopping"
Impossible to insert
holding taper into the
spindle sleeve.
Motor does not start
Motor is overheating and
there is no power
Precision of the work
deficient
Spindle bearing
overheating
GB MT50
82
Cause/
possible effects
Spindle turning dry
Tool blunt or incorrectly secured
Incorrect speed.
Chips do not come out of the bore
hole.
Tool blunt.
Operating without cooling agent.
Hard fibre in the wood or unequal
length of the cutting spiral or
angles in the bit
Tool deformed
Tool deformed
Bearings worn down in the spindle
head
Spindle head
Tool badly secured
Defective clamping chuck
Remove any dirt, grease or oil from
the internal conical surface of the
spindle sleeve or the grip cone.
Motor is wrongly connected
Defective fuse
Motor overloaded
Insufficient mains voltage
Motor badly connected
Heavy and unbalanced or
deformed work-piece
Inexact horizontal position of the
part holder
Bearing worn down
Bearing pretension is too high
Working at high speeds for a long
time
Translation of original operating manual
Solution
Grease spindle
Use new tool and check securing (fixed
setting of the bit, bit-holder and conical
chuck).
Select another rate, feed too high.
Retract tool more often during machining.
Sharpen or replace tool.
Use cooling agent
Replace tool
Replace tool
Have the bearings in the spindle head
replaced
Secure the tool properly
Replace the clamping chuck
Clean surfaces well.
Keep surfaces free of grease.
Have it checked by authorised personnel.
Reduce feed, disconnect if necessary
and have it checked by authorised
personnel
Have it checked by authorised personnel
Balance the piece statically and secure
without straining
Adjust workpiece-holder
Replace
Reduce bearing clearance in the fixed
bearing
Reduce feed rate
Version 1.2.8 - 2020-08-03