HEIDENHAIN iTNC 530 (34049x-08) ISO programming - Manual (Page 497)

HEIDENHAIN iTNC 530 497
14.7 Compensating w
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piece misalignment with a 3-D t
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obe
14.7 Compensating workpiece
misalignment with a 3-D touch
probe
Introduction
The TNC electronically compensates workpiece misalignment by
computing a "basic rotation."
For this purpose, the TNC sets the rotation angle to the desired angle
with respect to the reference axis in the working plane. See figure at
right.
As an alternative, you can also compensate the misalignment by
rotating the rotary table.
X
Y
PA
X
Y
A B
Select the probe direction perpendicular to the angle
reference axis when measuring workpiece misalignment.
To ensure that the basic rotation is calculated correctly
during program run, program both coordinates of the
working plane in the first positioning block.
You can also use a basic rotation in conjunction with the
PLANE function. In this case, first activate the basic
rotation and then the PLANE function.
If you change the basic rotation, the TNC asks you if you
also want to save the changed basic rotation in the active
line of the preset table when you exit the menu. In this
case, confirm with the ENT key.
If your machine has been prepared for it, the TNC can also
conduct a real, three-dimensional set-up compensation. If
necessary, contact your machine tool builder.
Setting bit 18 in MP7680 suppresses the error message
Axis angle not equal to tilt angle
when a manual
probing cycle is used to measure a basic rotation or to
align the workpiece by means of the rotary axis. This way
you can determine the basic rotation at positions that
would not be accessible without tilting the head.