HEIDENHAIN TNC 360 ISO Programming - Manual (Page 189)

8-36
8 Cycles
TNC 360
8.4 Cycles for Coordinate Transformations
Cycle in a part program
%S846I G71 * ............................................................ Begin program
N10 G30 G17 X+0 Y+0 Z–20 * ................................... Define workpiece blank
N20 G31 X+100 Y+100 Z+0 *
N30 G99 T1 L+0 R+4 * .............................................. Tool definition
N40 T1 G17 S1500 * .................................................. Tool call
N50 G00 G40 G90 Z+100 * ........................................ Retract the tool
N60 L1,0 * .................................................................. Execute sequence 1, non-rotated
N70 G54 X+70 Y+60 *
N80 G73 G90 H+35 *
N90 L1,0 * .................................................................. Execute sequence 2 with datum shift and rotation
N100 G73 G90 H+0 * ................................................. Cancel rotation
N110 G54 X+0 Y+0 * ................................................. Cancel datum shift
N120 Z+100 M02 *
N130 G98 L1 *
N250 G98 L0 *
N9999 %S846I G71 *
The corresponding subprogram (see page 8-32) is programmed after M2.
SCALING FACTOR G72
Application
This cycle allows you to increase or reduce the size of contours within a
program, such as for shrinkage or finishing allowances.
Activation
A scaling factor becomes effective as soon as the cycle is defined. Scaling
factors can be applied
• in the working plane or to all three coordinate axes at the same time
(depending on MP7410)
• to the dimensions in cycles
• also in the parallel axes U, V, W.
Input data
The cycle is defined by entering the scaling factor F. The TNC multiplies
the coordinates and radii by the F factor (as described under "Activation"
above).
To increase the size:
enter F greater than 1 (max. 99.999 999)
To reduce the size: enter F smaller than 1 (down to 0.000 001)
Cancellation
To cancel a scaling factor, enter a scaling factor of 1.
Prerequisite
Before entering a scaling factor it is advisable to set the datum to an edge
or corner of the contour.
.
.
.
This subprogram is identical to the subpro-
gram on page 8-32