HEIDENHAIN TNC 620 User Manual page 451

Reducing display of a rotary axis to a value less than
360°: M94
Standard behavior
The TNC moves the tool from the current angular value to the
programmed angular value.
Example:
Current angular value:
Programmed angular value:
Actual distance of traverse:
Behavior with M94
At the start of block, the TNC first reduces the current angular
value to a value less than 360° and then moves the tool to the
programmed value. If several rotary axes are active, M94 will
reduce the display of all rotary axes. As an alternative you can enter
a rotary axis after M94. The TNC then reduces the display only of
this axis.
Example NC blocks
To reduce display of all active rotary axes:
L M94
To reduce display of the C axis only:
L M94 C
To reduce display of all active rotary axes and then move the tool in
the C axis to the programmed value:
L C+180 FMAX M94
Effect
M94 is effective only in the block in which it is programmed.
M94 becomes effective at the start of block.
HEIDENHAIN | TNC 620 | Conversational Programming User's Manual | 10/2015
Miscellaneous functions for rotary axes 12.4
538°
180°
-358°
12
451