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Miscellaneous functions for rotary axes 12.4 – HEIDENHAIN TNC 620 (73498x-02) ISO programming User Manual

Page 365

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Miscellaneous functions for rotary axes 12.4

12

TNC 620 | User's Manual for DIN/ISO Programming | 5/2013

365

M128 on tilting tables

If you program a tilting table movement while

M128 is active, the

TNC rotates the coordinate system accordingly. If, for example,
you rotate the C axis by 90° (through a positioning command or
datum shift) and then program a movement in the X axis, the TNC
executes the movement in the machine axis Y.

The TNC also transforms the defined datum, which has been
shifted by the movement of the rotary table.

M128 with 3-D tool compensation

If you carry out a 3-D tool compensation with active

M128 and

active radius compensation /

G41/G42, the TNC will automatically

position the rotary axes for certain machine geometrical
configurations (Peripheral millingSee "Three-dimensional tool
compensation (software option 2)").

Effect

M128 becomes effective at the start of block, M129 at the end of
block.

M128 is also effective in the manual operating modes and

remains active even after a change of mode. The feed rate for the
compensation movement will be effective until you program a new
feed rate or until you cancel

M128 with M129.

Enter

M129 to cancel M128. The TNC also cancels M128 if you

select a new program in a program run operating mode.

Example NC blocks

Feed rate of 1000 mm/min for compensation movements:

N50 G01 G41 X+0 Y+38.5 IB-15 F125 M128 F1000 *