HEIDENHAIN TNC 128 (77184x-01) - Manual (Page 452)

452 Cycles: Coordinate transformations
1
8
.6 SCALING F
A
CT
OR (Cy
c
le 1
1
)
18.6 SCALING FACTOR (Cycle 11)
Effect
The TNC can increase or reduce the size of contours within a program,
enabling you to program shrinkage and oversize allowances.
SCALING becomes effective as soon as it is defined in the program. It
is also effective in the Positioning with MDI mode of operation. The
active scaling factor is shown in the additional status display.
The scaling factor has an effect on
 All three coordinate axes at the same time
 Dimensions in cycles
Prerequisite
It is advisable to set the datum to an edge or a corner of the contour
before enlarging or reducing the contour.
Enlargement: SCL greater than 1 (up to 99.999 999)
Reduction: SCL less than 1 (down to 0.000 001)
Resetting
Program the SCALING cycle once again with a scaling factor of 1.
Cycle parameters
 Scaling factor?: Enter the scaling factor SCL. The
TNC multiplies the coordinates and radii by the SCL
factor (as described under "Effect" above). Input
range: 0.000000 to 99.999999
Z
Z
X
X
Y
Y
X
Y
60
40
X
Y
36
30
(27)
(22.5)
Example: NC blocks
11 CALL LBL 1
12 CYCL DEF 7.0 DATUM SHIFT
13 CYCL DEF 7.1 X+60
14 CYCL DEF 7.2 Y+40
15 CYCL DEF 11.0 SCALING
16 CYCL DEF 11.1 SCL 0.75
17 CALL LBL 1