HEIDENHAIN TNC 410 ISO Programming - Manual (Page 181)

HEIDENHAIN TNC 410, TNC 426, TNC 430 155
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Entering M112 in a positioning block
If you press the soft key M112 in a positioning block (in answer to the
"Miscellaneous function?" prompt), the TNC then continues the dialog
by asking you for the permissible tolerance T and the limit angle A.
You can also define E and H through Q parameters, see “Principle and
Overview,” page 330.
Effect
M112 is effective during operation with velocity feedforward as well
as with servo lag.
M112 becomes effective at the start of block.
To cancel M112, enter M113.
Example NC block
N50 G01 G40 X+123.723 Y+25.491 F800 M112 E0.01 H10 *