5 miscellaneous functions f or r otary ax es – HEIDENHAIN iTNC 530 (60642x-04) User Manual

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Programming: Multiple Axis Machining

12.5 Miscellaneous functions f

or r

otary ax

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 RL/RR, the TNC will automatically position the

rotary axes for certain machine geometrical configurations (Peripheral

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:

L X+0 Y+38.5 IB-15 RL F125 M128 F1000