Datum In Touch Probe Axis (Cycle 417, Din/Iso: G417, Software Option 17); Cycle Run; Please Note While Programming - HEIDENHAIN TNC 620 User Manual

15
Touch Probe Cycles: Automatic Datum Setting
15.11 DATUM IN TOUCH PROBE AXIS (Cycle 417, DIN/ISO: G417, software
option 17)
15.11 DATUM IN TOUCH PROBE AXIS (Cycle
417, DIN/ISO: G417, software option
17)

Cycle run

Touch Probe Cycle 417 measures any coordinate in the touch probe
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 294) to the programmed
touch point 1. The TNC offsets the touch probe by the safety
clearance in the positive direction of the touch probe axis.
2 Then the touch probe moves in its own axis to the coordinate
entered as starting point
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 322) and saves the
actual value in the Q parameters listed below.
Parameter number
Q160

Please note while programming:

Danger of collision!
If you set a datum (Q303 = 0) with the touch probe
cycle and also use probe in TS axis (Q381 = 1), then
no coordinate transformation must be active.
Before a cycle definition you must have programmed
a tool call to define the touch probe axis.
The TNC then sets the datum in this axis.
360
1
and measures the actual position
Meaning
Actual value of measured point
TNC 620 | User's Manual Cycle Programming | 3/2014