HEIDENHAIN CNC Pilot 4290 - Manual (Page 376)

7 Parameters 364
7.5 Mac
hining P
a
ra
met
ers
■ Approach - external finishing [ANFA]
■ Approach - internal finishing [ANFI]
■ Depart - external finishing [ABFA]
■ Depart - internal finishing [ABFI]
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).
The machining of contour areas is determined by the following
parameters:
■ Standard/Complete – external/longitudinal [FAL]
■ Standard/Complete – internal/longitudinal [FIL]
■ Standard/Complete – external/transverse [FAP]
■ Standard/Complete – internal/transverse [FIP]
Entry:
■ 0 – Complete finishing cycle: TURN PLUS searches for an optimum
tool for machining the complete contour area.
■ 1 – Standard finishing cycle:
■ is primarily executed with standard finishing tools. Relief turns
and undercuts are machined with a suitable tool.
■ If the standard finishing tool is not suitable for machining relief
turns and undercuts, TURN PLUS divides the machining process
into standard machining cycles and the machining cycles for form
elements.
■ If the division into standard machining cycles and machining
cycles for form elements is not successful, TURN PLUS switches
to ”full-surface machining.”
Finishing – Tool tolerances, traversing to/from tool change
position
For tool selection, the following applies:
■ Setting angle (EW): EW >= mkw (mkw: increasing contour angle)
■ Setting angle (EW) and point angle (SW):
NWmin < (EW+SW) < NWmax
■ Secondary angle (FNWT): FNWT = NWmax – NWmin
■ Secondary angle tolerance [FNWT] – tolerance range for
secondary cutting edge
■ Relief cutting angle [FFW] – Minimum angle differential between
the contour and secondary cutting edge