HEIDENHAIN TNC 426 (280 476) Pilot - Manual (Page 77)

78
Cycles
for
Coordinate
Transformations
Cycles for Coordinate Transformation
Cycles for coordinate transformation permit contours to be
• Shifted
Cycle 7 DATUM SHIFT
• Mirrored Cycle 8 MIRROR IMAGE
• Rotated (in the plane) Cycle 10 ROTATION
• Tilted out of the plane Cycle 19 WORKING PLANE
• Enlarged or reduced Cycle 11 SCALING
Cycle 26 AXIS-SPECIFIC SCALING
Cycles for coordinate transformation are effective upon definition
until they are reset or redefined. The original contour should be
defined in a subprogram. Input values can be both absolute and
incremental.
DATUM SHIFT (7)
CYCL DEF: Select Cycle 7 DATUM SHIFT
Enter the coordinates of the new datum or the number of the
datum from the datum table.
To cancel a datum shift: Re-enter the cycle definition with the input
value 0.
9 CALL LBL1
Call the part subprogram
10 CYCL DEF 7.0 DATUM SHIFT
11 CYCL DEF 7.1 X+60
12 CYCL DEF 7.2 Y+40
13 CALL LBL1
Call the part subprogram
When combining transformations, the datum shift must be
programmed before the other transformations!