Siemens SINUMERIK 840D Programming Manual page 284

4 4
Turning Cycles 03.96
09.01
4.3 Grooving cycle – CYCLE93
If the parameter is assigned another value, the cycle
is aborted and alarm
61002 "Machining type incorrectly programmed".
is output.
The contour monitoring performed by the cycle
ensures that a realistic groove contour results. This
is not the case if the radii/chamfers touch each other
at the base of the groove or overlap or if an attempt
at face grooving is made on a section of the contour
that runs parallel to the longitudinal axis. In these
cases, the cycle is aborted with alarm
61603 "Groove form incorrectly defined".
_VRT (variable retraction path)
With SW 6 and higher, the retraction path can be
programmed on the basis of the outside or inside
diameter of the groove in parameter _VRT. If
_VRT=0 (parameter not programmed), liftoff is 1mm.
The retraction path is always measured in the
programmed system of units inch or metric.
The same retraction path is also used for chip-
breaking after each depth infeed into the groove.
© Siemens AG, 2002. All rights reserved
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SINUMERIK 840D/840Di/810D Programming Guide Cycles (PGZ) – 11.02 Edition