Please Note While Programming - HEIDENHAIN TNC 640 User Manual

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Please note while programming:

Danger of collision!
The cutting limit defines the contour range to be machined. The
approach and departure paths can exceed the cutting limits. The
tool position before the cycle call influences the execution of the
cutting limit. The TNC 640 machines the area to the right or to
the left of the cutting limit, depending on which side the tool has
been positioned before the cycle is called.
Before the cycle is called position the tool so that it is already
on the side of the cutting limit on which the material is to be
cut
Program a positioning block to the starting position with
radius compensation R0 before the cycle call.
The tool position at cycle call defines the size of the area
to be machined (cycle starting point).
Before calling the cycle you must program the cycle 14
CONTOUR to define the subprogram number.
FUNCTION TURNDATA CORR TCS: Z/X DCW and/or an
entry in the DCW column of the turning tool table can
be used to activate an oversize for the recessing width.
DCW can accept positive and negative values and is
added to the recessing width: CUTWIDTH + DCWTab +
FUNCTION TURNDATA CORR TCS: Z/X DCW. A DCW
programmed via FUNCTION TURNDATA CORR TCS is not
visible while a DCW entered in the table is active in the
graphics.
When you use local QL Q parameters in a contour
subprogram you must also assign or calculate these in
the contour subprogram.
460
NOTICE
Cycles: Turning | AXIAL RECESSING
(Cycle 870, DIN/ISO: G870)
HEIDENHAIN | User's manual for cycle programming | 10/2017