OPTIMUM
MASCHINEN - GERMANY
Maintenance
Version 1.1.5 dated 2015-08-31 Page 41Original operating instructions
BF30Vario GB
As required
Spindle nut cross table
Readjusting
An extended clearance in the spindles of the cross table can
be reduced by readjusting the spindle nuts.
Img.5-5: Spindle nut X - axis (milling table faded
out)
The spindle nuts are readjusted by reducing the thread flanks
of the spindle nut by means of a regulating screw. Due to the
readjustment it is necessary to check if a smooth movement
over the whole travel is still given, otherwise the wear is con-
siderably increased due to the friction between the spindle nut
and the spindle.
The regulating screw of the spindle nut of the Y axis is acces-
sible from the rear side, the regulating screw of the spindle nut
of the x axis is accessible from the right or left side of the mill-
ing table.
As required
Spindle nut Z- axis
Readjusting
An enlarged clearance in the spindle of the Z-axis can be per-
formed by reciprocal turning of the spindle nut.
Img.5-6: Spindle nuts Z-axis
Due to the readjustment it is necessary to check if a smooth
movement over the whole travel is still given, otherwise the
wear is considerably increased due to the friction between the
spindle nut and the spindle.
Turn the crank of the drilling-milling head as low as possi-
ble.
Firmly clamp the clamping lever left and right.
Remove the service cover from the column.
Interval Where? What? How?
Spindle nut adjusting screw
Spindle nut firm at the top
Spindle nut turnable at the bot-
tom
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