HEIDENHAIN TNC 370 User Manual page 154

5 Programming Tool Movements
L
5.7 M Functions for Contouring Behavior and Coordinate Data
Reducing rotary axis display values to under 360": M94
Machine parameter 7470 determines whether the position display value of
a rotary axis are limited to
l
+/- 360" or
l
+I- 30 000"
If the display values are limited to +/- 30 000". you can reduce the display
value to under 360" by entering the miscellaneous function M94.
Example: L M 94
L C+538 FMAX M94
Only reduce display
Reduce display and then move to
programmed value
Duration of effect
M94 is effective at the start of block and only in the block in which it is
programmed.
Optimized traverse of rotary axes: Ml26
L
Standard behavior-without Ml26
If the display of a rotary axis is reduced to a value under 360". the TNC will
move the tool on the following path:
350" IO" -340"
\
IO" 340" +330"
Optimized traverse of rotary axes - with Ml26
If the display of a rotary axis is reduced to a value under 360". the TNC will
move the tool on the following path:
Aotwtl position Naminat ptition Actual path of Travis
L
350" IO" +20"
IO" 340" -30"
Resulting NC block: L C+ 10 A+340 RO F500 M 126
Duration of effect
Ml 26 is effective at the start of block. Ml 26 is cancelled by Ml 27 or at
the end of the program.
TNC 370 5-55