HEIDENHAIN TNC 407 (280 580) ISO Programming - Manual (Page 177)

TNC 426/TNC 425/TNC 415 B/TNC 407 5 - 4 4
5 Programming Tool Movements
Optimized traverse of rotary axes: M126
Standard behavior – without M126
If you reduce display of a rotary axis to a value less than 360°, the TNC
will move the axis in the following way:
Actual position Nominal position Actual path of traverse
350° 10° –340°
10° 340° +330°
Optimized traverse of rotary axes – with M126
If you reduce display of a rotary axis to a value less than 360°, the TNC
will move the axis in the following way:
Actual position Nominal position Actual path of traverse
350° 10° +20°
10° 340° –30°
Resulting NC block: L C+10 A+340 R0 F500 M126
Duration of effect
M126 is effective at the beginning of the block. M126 is cancelled by
M127 or at the end of program.
5.6 M Functions for Contouring Behavior