HEIDENHAIN CNC Pilot 4290 - Manual (Page 377)

HEIDENHAIN CNC PILOT 4290 365
7.5 Mac
hining P
a
ra
met
ers
Finishing – Machining analysis
■ Minimum finishing transverse length [FMPL] – TURN PLUS
checks the frontmost element of the outside contour to be finish-
machined. The following rules apply:
■ Finished part with inside contour:
■ FMPL >= l1: Without additional transverse cut
■ FMPL < l1: With additional transverse cut
■ Finished part without inside contour: Always with additional
transverse cut
■ The additional transverse cut is always from the outside
to the inside.
■ The ”transverse angle variation PWA” does not influence
the analysis of the transverse elements.
■ Maximum finishing cut depth [FMST] – defines the permissible
infeed depth for non-machined undercuts. The finishing cycle (G890)
uses this parameter to determine whether undercuts (type E, F, G)
will be machined with a contour-finishing operation. The following
applies:
■ FMST > ft: With undercut machining (ft: undercut depth)
■ FMST <= ft: Without undercut machining
■ Number of revolutions for chamfer or rounding [FMUR] – The
feed rate is reduced such that at least FMUR revolutions can be
executed (evaluation: finishing cycle G890).
6 – Recessing and contour recessing
Recessing – Traverse from/to tool change position
■ Approach - external recessing [ANESA]
■ Approach - internal recessing [ANESI]
■ Depart - external recessing [ABESA]
■ Depart - internal recessing [ABESI]
Recessing – Traverse from/to tool change position
■ Approach - external contour recessing [ANKSA]
■ Approach - internal contour recessing [ANKSI]
■ Depart - external contour recessing [ABKSA]
■ Depart - internal contour recessing [ABKSI]
Entries for retracting a tool:
■ 1: Simultaneous, X and Z direction
■ 2: First X direction, then Z
■ 3: First Z direction, then X
■ 6: Coupled motion, first X, then Z
■ 7: Coupled motion, first Z, then X
Approach and departure are in rapid traverse (G0).