Circle Center As Preset - HEIDENHAIN TNC 620 User Manual

Setup | Presetting with a 3-D touch probe (option number 17)
You can determine the intersection of two straight lines
using holes or studs and set it as a preset.
The ROT 1 soft key activates the angle of the first straight line as
basic rotation or as offset and the ROT 2 soft key activates the angle
or offset of the second straight line.
If you activate the basic rotation, the control automatically writes the
positions and the basic rotation to the preset table.
If you activate the offset, the control automatically writes the
positions and the offset or only the positions to the preset table.

Circle center as preset

With this function, you can set the preset at the center of bore holes,
circular pockets, cylinders, studs, circular islands, etc.
Inside circle:
The control probes the inside wall of a circle in all four coordinate
axis directions.
For incomplete circles (circular arcs) you can choose the appropriate
probing direction.
Position the touch probe approximately in the
center of the circle
Select the touch probe function: Press the
PROBING CC soft key
Select the soft key for the desired probing
direction
Probe: Press the NC Start key. The touch probe
probes the inside wall of the circle in the selected
direction. Repeat this process. After the third
probing process, you can have the control
calculate the center (four touch points are
recommended)
Terminate the probing procedure and switch to
the evaluation menu: Press the EVALUATE soft
key
Preset: Enter the X and the Y coordinates of the
center of the circle in the menu window.
Apply with the SET PRESET soft key
Further information: "Writing measured values
from the touch probe cycles to a datum table",
Page 213
Further information: "Writing measured values
from the touch probe cycles to the preset table",
Page 214
Terminate the probing function: Press the END
soft key
The control needs at least three touch points to calculate
outside or inside circles, e.g. with circle segments. More
precise results are obtained with four touch points. If
possible, always pre-position the touch probe to the
center.
HEIDENHAIN | TNC 620 | User's Manual for Setup, Testing and Running NC Programs | 01/2022
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