4 compensating workpiece misalignment, Introduction, Measuring the basic rotation – HEIDENHAIN TNC 426B (280 472) Touch Probe Cycles User Manual
Page 30: Measure a basic rotation using a line
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2 Touch Probe Cycles in the Manual and Electronic Handwheel Modes
2.4 Compensating W
o
rk
piece Misalignment
2.4 Compensating Workpiece
Misalignment
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.
Measuring the basic rotation
U
U
U
U
Select the probing function by pressing the PROBING
ROT soft key.
U
U
U
U
Position the ball tip at a starting position near the first
touch point.
U
U
U
U
Select the probe direction perpendicular to the angle
reference axis: Select the axis by soft key.
U
U
U
U
To probe the workpiece, press the machine START
button.
U
U
U
U
Position the ball tip at a starting position near the
second touch point.
U
U
U
U
To probe the workpiece, press the machine START
button.
The TNC saves the basic rotation in non-volatile memory. The basic
rotation is effective for all subsequent program runs and graphic
simulation.
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.