LNS SERVO S3 T, Instruction Manual

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80 CHAPTER 7: OPERATION
QUICK LOAD SERVO S3T
b) Soft grips
Incorrect: The radius of the grip is greater than
the radius of the bar. The jaws press against only
three points at 120 degrees.
Correct:
Modify the centers of the jaws to obtain
2 times 6 support clamping points at 60 degrees.
3.3. Lathe – barfeed adaptation
3.3.1. Reduction tubes
The efficiency of the bar guiding in the lathe is determined by the clearance between the spindle bore and
the rotating bar. The greater the clearance, the more frequent the vibrations.
Using reduction tubes helps to reduce this clearance. Guiding is thus improved, but, in addition, the
insertion of the bar into the collet of the lathe is made much easier.
The inside diameter of reduction tubes should be based on the diameter of the bar (Ø of the bar + 1 mm),
but should always be larger than the diameter of the pusher.
For inserting and removing the spindle reductions, move the bar feeder using the retraction system (see
Chapter 6, section 7. RETRACTION SYSTEM for more information).
Spindle reduction tubes are available from LNS, upon request.