Datum Shift - HEIDENHAIN TNC 426 PB/M Technical Manual

Table of Contents

6.20 Datum Shift

Datum shift with

D528 to D544

December 2001

With the datum shift function you can offset the defined datum point.

The same initial position must apply for the description of the machine

geometry via MP7510 and following (See "Tilting Axes" on page 6 – 52) and

the datum shift.

You can activate the datum shift during an M/S/T/Q strobe.

In D528 to D544, enter for each axis the distance by which the datum is to

be shifted, or use Module 9230. For axes 6 to 9, use only Module 9230.

Activate the datum shift with M4132. After the datum shift the NC resets

The offset is calculated into the position display — the display now shows the

position values according to the shifted coordinate system.

Actual value display for X axis without datum shift = 50

Shift value in D528 = +20

M4132 is set, i.e., datum shift is active

New actual value display X = +70 (the old datum receives the value 20).

Datum shift for axis 1

Datum shift for axis 2

Datum shift for axis 3

Datum shift for axis 4

Datum shift for axis 5

Activate datum shift from D528 to D544,

or call Module 9230

Module 9230 Datum shift

With this module you transfer the axis and the amount by which the datum is

to be shifted.

M4132 is set when Module 9230 is called. After execution of the datum shift,

the NC resets M4132.

B/W/D/K <Axis [0 to 8]>

B/W/D/K <Shift [0.1 µm]>

Error recognition:

Error code in W1022

Invalid axis number

Missing strobe or control is active

Module was called in a spawn job or submit job