Selecting Tilting Axes: M138 - HEIDENHAIN TNC 620 User Manual

Multiple-Axis Machining | Miscellaneous functions for rotary axes

Selecting tilting axes: M138

Standard behavior
The control performs M128, TCPM and Tilt working plane only
for those axes that the machine tool builder has specified in the
machine parameters.
Behavior with M138
The control performs the above functions only in those tilting axes
that you have defined using M138.
Refer to your machine manual.
If you restrict the number of tilting axes with the M138
function, your machine may provide only limited tilting
possibilities. The machine tool builder will decide
whether the control takes the angles of deselected axes
into account or sets them to 0.
Effect
M138 becomes effective at the start of the block.
You can cancel M138 by reprogramming it without specifying any
axes.
Example
Perform the above-mentioned functions only in the tilting axis C.
L Z+100 R0 FMAX M138 C
HEIDENHAIN | TNC 620 | Conversational Programming User's Manual | 10/2017
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