16. Operational faults and the elimination of such
Operational faults Possible cause Remedy
The drive motor (1.4 kW)
experiences "skips" during
operation
Carbon brushes and collector of
the drive motor are contaminated
Clean the carbon brushes and
collector of the drive motor
with a piece of coarse
sandpaper
(See "Maintenance" section)
Carbon brushes are worn Replace carbon brushes with
new ones
Tool skid cannot be moved or
can only be moved with
considerable force
Clamping of the tool skid is on Open the clamping
Guide play is set too narrowly Adapt the guide play
Transverse or longitudinal skid
cannot be moved or can only
be moved with considerable
force
Guide play is set too narrowly Adapt the guide play
Play of the trapezoidal-threaded
nut is set too narrowly (only
transverse skid)
Adapt the play of the
trapezoidal-threaded nut
Rust on work pieces of machine
parts when using coolant
lubrication
Wrong coolant set Check the mixing ratio of the
coolant and correct if required
(never cool with water alone!)
Tool holder cannot be inserted
into the main spindle (reducing
sleeve of the main spindle)
An incorrect tool taper of the tool
holder has been used in
combination with the reducing
sleeve
Only use the appropriate tool
holders for the machine
Inner cone of the reducing sleeve
or outer cone of the tool holder is
contaminated
Clean the relevant cone
Tool overheated Revolutions too high Reduce the revolutions
Feed too high Reduce the feed
Working without coolant Use coolant
Insufficient coolant feed at the
cutting edge
Align the coolant hose
correctly
Tool blunt
Sharpen tool or use a new tool
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