HEIDENHAIN TNC 640 (34059x-05) Cycle programming - Manual (Page 210)

Fixed Cycles: Contour Pocket
7.10 CONTOUR TRAIN DATA (Cycle 270, DIN/ISO: G270)
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TNC 640 | User's Manual Cycle Programming | 1/2015
7.10 CONTOUR TRAIN DATA (Cycle 270,
DIN/ISO: G270)
Please note while programming:
You can use this cycle to specify various properties of Cycle 25
CONTOUR TRAIN.
Cycle 270 is DEF active, which means that it
becomes effective as soon as it is defined in the part
program.
If Cycle 270 is used, do not define any radius
compensation in the contour subprogram.
Define Cycle 270 before Cycle 25.
Cycle parameters
Type of approach/departure (1/2/3) Q390:
Definition of the type of approach and departure:
Q390=1:
Approach the contour tangentially on a circular path
Q390=2:
Approach the contour tangentially on a straight line
Q390=3:
Approach the contour at a right angle
Radius compensation (0=R0/1=RL/2=RR) Q391:
Definition of the radius compensation:
Q391=0:
Machine the defined contour without radius
compensation
Q391=1:
Machine the defined contour with radius
compensation RL
Q391=2:
Machine the defined contour with radius
compensation RR
Approach/departure radius Q392: Only in effect
if tangential approach on a circular path is selected
(Q390=1). Radius of the approach/departure arc.
Input range 0 to 99999.9999
Center angle Q393: Only in effect if tangential
approach on a circular path is selected (Q390=1).
Angular length of the approach arc. Input range 0 to
99999.9999
Distance to auxiliary point Q394: Only in effect if
tangential approach on a straight line or right-angle
approach is selected (Q390=2 or Q390=3). Distance
to the auxiliary point from which the TNC is to
approach the contour. Input range 0 to 99999.9999 NC blocks
62 CYCL DEF 270 CONTOUR TRAIN
DATA
Q390=1
;TYPE OF APPROACH
Q391=1 ;RADIUS
COMPENSATION
Q392=3 ;RADIUS
Q393=+45 ;CENTER ANGLE
Q394=+2 ;DISTANCE