Table of contents
3QLCLM
Edition: 04/2014
36
6.5 Preparations for using the power chuck
After the chuck has been mounted but before it is used, the following steps must be taken to ensure
trouble-free operation:
•
Clean everything from the machine that does not belong to it (e.g. assembly tools).
•
Check whether the fill level of lubrication is OK (see also
Maintenance)
•
Carry out a no-load operating cycle (without work piece) of the chuck to distribute the grease.
•
Check all visible screws and bolts for tightness.
•
Check the movement of the jaws.
6.6 Safety instructions
The test regulations of the industrial safety authority demands that not only a pressure monitor but also a
stroke monitor is provided for the actuating cylinder. The stroke monitor must ensure that the spindle and
feed drives cannot be started or are automatically stopped if the power chuck is opened or the actuating
cylinder reaches the end of its stroke.
•
Use limit switches to VDE 0113 / 12 with mechanically operated positive-acting NC contacts to monitor
the actuating cylinder stroke.
•
If other control elements, e.g. proximity limit switches, are used instead of the safety limit switches, the
same degree of safety must be assured.
•
Use a safety margin of 1 mm. in each direction when setting the limit switch actuators to the permissible
stroke.
Right hand stop
Left hand stop
only here!
Spindle rotation is
permitted
Safety margin
Safety margin
Safety margin
Safety margin
Working stroke
Working stroke
Total stroke
Total stroke
