Measuring 3-d basic rotation, Or aligning a plane ("measuring 3-d – HEIDENHAIN TNC 620 (81760x-02) ISO programming User Manual

Page 479

Compensating workpiece misalignment with 3-D touch probe

(option 17)

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TNC 620 | User's ManualDIN/ISO Programming | 2/2015

479

Measuring 3-D basic rotation

The misalignment of any tilted plane can be measured by probing
3 positions. The

Probe plane function enables you to measure this

misalignment and save it as a 3-D basic rotation in the preset table.

Observe the following when selecting the touch
points:

The sequence and position of the touch points

determines how the TNC calculates the direction of

the plane.
With the first two points you specify the direction

of the reference axis. Define the second point in the

positive direction of the desired reference axis. The

position of the third point determines the direction

of the minor axis and tool axis. Define the third

point in the positive Y axis of the desired workplace

coordinate system.

1st point: On the reference axis
2nd point: On the reference axis, in a positive

direction from the first point
3rd point: On the minor axis, in a positive

direction of the desired workpiece coordinate

system

Optionally inputting a datum angle enables you to define the

nominal direction of the probed plane.

Select the probing function: Press the

PROBING

PL soft key. The TNC then displays the current 3-D

basic rotation
Position the touch probe at a position near the first

touch point
Select the probe direction or probing routine by

soft key
Start the probing procedure: Press the machine

START button
Position the touch probe at a position near the

second touch point
To probe the workpiece, press the machine START

button
Position the touch probe near the third touch point
Probing: Press the machine START button. The

TNC measures the 3-D basic rotation and displays

the values for SPA, SPB and SPC related to the

active workpiece coordinate system
If required, enter the datum angle

Activate 3-D basic rotation

Press the

SET BASIC ROTATION soft key

Saving a 3-D basic rotation in the preset table

Press the

BASIC ROT. IN PRESET TABLE soft key