HEIDENHAIN TNC 128 (77184x-01) - Manual (Page 293)

HEIDENHAIN TNC 128 293
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.5 Using the 3-D t
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obe
Position the touch probe approximately in the center of the hole (inside
circle) or near the first touch point on the stud (outside circle), and
select the soft key for the first probing direction. Once you press the
machine START button to start the touch probe cycle, the TNC
automatically performs all prepositioning movements and probing
operations.
The TNC positions the touch probe to the individual touch points,
taking the safety clearance into account. If a clearance height has been
defined, the TNC positions the touch probe to clearance height in the
spindle axis beforehand.
The TNC approaches the position at the feed rate FMAX defined in the
touch probe table. The defined probing feed rate F is used for the
actual probing operation.
Selecting touch probe cycles
 Select the Manual Operation or El. Handwheel mode of operation
 Select the touch probe functions by pressing the
TOUCH PROBE soft key. The TNC displays additional
soft keys (see overview table).
 Select the touch probe cycle by pressing the
appropriate soft key, for example PROBING POS, for
the TNC to display the associated menu
Before starting the automatic probing routine, you need to
preposition the touch probe near the first touch point.
Offset the touch probe by approximately the safety
clearance (value from touch probe table + value from
input form) opposite to the probing direction.
For an inside circle with a large diameter, the TNC can also
preposition the touch probe on a circular arc at the
positioning feed rate FMAX. This requires that you enter a
safety clearance for prepositioning and the hole diameter
in the input form. Position the touch probe inside the hole
at a position that is offset by approximately the safety
clearance from the wall. For prepositioning, keep in mind
the starting angle for the first probing operation (with an
angle of 0°, the TNC probes in the positive direction of the
principal axis).
When you select a manual probing function, the TNC
opens a form displaying all data required. The content of
the forms varies depending on the respective function.
You can also enter values in some of the fields. Use the
arrow keys to move to the desired input field. You can
position the cursor only in fields that can be edited. Fields
that cannot be edited appear dimmed.