Miscellaneous Function M128, Tcpm - HEIDENHAIN iTNC 530 HSCI Technical Manual

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Miscellaneous

function M128,

Automatic compensation with M128 or TCPM:

Linear and rotational movements are superimposed. The resulting contour

deviations are compensated.

When the table is rotated, the coordinate system is rotated against the

machine coordinate system. The iTNC takes this into account.

M128 and TCPM remain in effect even after a change in operating modes.

This means that the axis can be moved with the compensated machine

geometry in Manual mode with the axis direction keys, or in the El.

Handwheel mode.

With the miscellaneous function M118, the handwheel positioning

movements can be superimposed on the program run movements. The

iTNC automatically performs the compensating movements in the principal

A transitional element is inserted at non-tangential contour transitions when

positioning with rotary axes. However, W1026/W1104 (axes in position) is not

set and axes will not be clamped. This problem can be solved with M134

(exact stop at non-tangential contour transitions when positioning with rotary

Program M134 in the NC program or set MP7440 bit 6 = 1.

When M128 or TCPM are used, the principal axes make compensating

In MP7471, define the maximum velocity of the principal axes during

compensating movements. The speed for compensating movements with

M128 can also be limited via the PLC and the FMAX soft key, in addition to

Output of M functions

Bit 6 – Automatic activation of M134

0: M134 must be activated in the NC program

1: M134 is automatically activated when an NC program is

Maximum velocity of the principal axes during

compensating movements through M128 or TCPM

0 to 300 000 [mm/min]

6.5 Tilting and swivel axes