HEIDENHAIN CNC Pilot 4290 - Manual (Page 306)

6 TURN PLUS 294
”Recessing sequence type” soft keys
Select longitudinal/transverse oversize
or constant oversize.
Precutting and finishing
Precutting
Finish-machining
Contour recessing radial/axial (G860)
For form elements: Recess general, relief turns (recess type F) and
freely defined recesses.
Parameters
X, Z:
Cutting limit
Type of oversize is set by soft key
I, K: Different longitudinal/transverse oversize
I: Constant oversize – generates ”oversize G58” before the
cycle
Process: Setting by soft key
■ Pre-cutting and finishing in one machining cycle
■ Only pre-cutting
■ Only finishing
6.12.5 Recessing
Overview of recessing operations
■ Contour recessing (G860) – radial, axial or automatic
■ Recessing (G866) – radial, axial or automatic
■ Recess turning (G869) – radial, axial or automatic
■ Parting (cutting off)
■ Parting/prepare rear-side machining (workpiece transfer)
Recessing radial/axial (G866)
For form elements: Recess type D (sealing ring), recess type S
(guarding ring)
If an allowance has been specified, TURN PLUS first rough-machines
and then finish-machines the recess. For finishing, the dwell period is
accounted for only during the finishing operation. Otherwise, the dwell
period is considered for each pass.
Parameters
I:
Oversize (longitudinal and transverse)
E: Period of dwell
6.12 Int
er
activ
e
W
o
rking Plan Gener
ation (IWG)