HEIDENHAIN TNC 426B (280 472) ISO programming - Manual (Page 151)

135 HEIDENHAIN TNC 410, TNC 426, TNC 430
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:
538°
Programmed angular value: 180°
Actual distance of traverse: –358°
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. To have the TNC reduce the
display for a specific rotary axis only, enter the axis after M94.
Example NC blocks
To reduce display of all active rotary axes:
N50 M94 *
Additionally on the TNC 426 and TNC 430:
To reduce display of the C axis only
N50 M94 C *
To reduce display of all active rotary axes and then move the tool in
the C axis to the programmed value:
N50 G00 C+180 M94 *
Effect
M94 is effective only in the block in which M94 is programmed.
M94 becomes effective at the start of block.
7.5 Miscellaneous F
unctions f
o
r
Rotary A
x
e
s
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