HEIDENHAIN TNC 620 (73498x-01) ISO programming - Manual (Page 332)

332 Programming: Multiple axis machining
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.4 Miscellaneous functions f
o
r r
o
tary ax
es
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:
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:
To reduce display of the C axis only:
To reduce display of all active rotary axes and then move the tool in
the C axis to the programmed value:
Effect
M94 is effective only in the block in which it is programmed.
M94 becomes effective at the start of block.
Current angular value: 538°
Programmed angular value: 180°
Actual distance of traverse: –358°
N50 M94 *
N50 M94 C *
N50 G00 C+180 M94 *