HEIDENHAIN TNC 640 (34059x-04) Cycle programming - Manual (Page 482)

Touch Probe Cycles: Automatic Datum Setting
16.13 DATUM IN ONE AXIS (Cycle 419, DIN/ISO: G419)
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TNC 640 | User's Manual Cycle Programming | 3/2014
16.13 DATUM IN ONE AXIS (Cycle 419, DIN/
ISO: G419)
Cycle run
Touch Probe Cycle 419 measures any coordinate in any axis
and defines it as datum. If desired, the TNC can also enter the
measured coordinate in a datum table or preset table.
1 Following the positioning logic, the TNC positions the touch
probe at rapid traverse (value from
FMAX column) (see
"Executing touch probe cycles", page 410) to the programmed
touch point
1 . The TNC offsets the touch probe by the safety
clearance in the direction opposite the programmed probing
direction.
2 Then the touch probe moves to the programmed measuring
height and measures the actual position with a simple probing
movement.
3 Finally the TNC returns the touch probe to the clearance height
and processes the determined datum depending on the cycle
parameters Q303 and Q305. (see "Characteristics common to all
touch probe cycles for datum setting", page 438)
Please note while programming:
Before a cycle definition you must have programmed
a tool call to define the touch probe axis.
If you use Cycle 419 several times in succession to
save the datum in more than one axis in the preset
table, you must activate the preset number last
written to by Cycle 419 after every execution of Cycle
419 (this is not required if you overwrite the active
preset).