HEIDENHAIN CNC Pilot 4290 - Manual (Page 303)

HEIDENHAIN CNC PILOT 4290 291
Cutting limitation with residual roughing
Using the ”Roughing hollowing - residual roughing ..” function, you can
remove residual material from sloping contours.
Cutting limitation: If no cutting limits are defined, TURN PLUS
machines in the selected area. To avoid collision, the select machining
area is reduced by the cutting limitation function. The machining cycle
accounts for the safety clearance (SAR, SIR – machining parameter 2)
in front of the remaining material.
Defining the cutting limitation
Position the tool so that it moves on the same side as the residual
material.
Selecting the machining range
Select the starting point of the remaining material as the position of
the cutting limitation (see figure).
Danger of collision
The residual material is machined without monitoring for
collision. Check the cutting limits and the angle of approach
given in the ”Cycle parameter (roughing)” dialog box.
Continued
AR: Starting point of residual material
SAR: External safety clearance (machining
parameter 2)
SB: Cutting limit
6.12 Int
er
activ
e
W
o
rking Plan Gener
ation (IWG)
Residual roughing (hollowing) – longitudinal/
transverse
Parameters
P:
Cutting depth (maximum infeed)
A: Approach angle (reference: Z axis)
■ Longitudinal: Default 0°/180° (parallel to Z axis)
■ Plan: default 90°/270° (perpendicular to Z axis)
W: Departure angle (reference: Z axis)
■ Longitudinal: Default 90°/270° (perpendicular to Z axis)
■ Transverse: Default 0°/180° (parallel to Z axis)
X, Z: Cutting limit
Type of oversize is selected by soft key per Softkey
I, K: Different longitudinal/transverse oversize
I: Constant oversize – generates ”oversize G58” before the
cycle
Plunging: Machine descending contours?
■ Yes
■ No
E: Reduced plunging feed rate with descending contours