HEIDENHAIN TNC 640 (34059x-05) Cycle programming - Manual (Page 506)

Touch Probe Cycles: Automatic Datum Setting
15.10 DATUM CIRCLE CENTER (Cycle 416, DIN/ISO: G416)
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TNC 640 | User's Manual Cycle Programming | 1/2015
15.10 DATUM CIRCLE CENTER (Cycle 416,
DIN/ISO: G416)
Cycle run
Touch Probe Cycle 416 finds the center of a bolt hole circle and
defines its center as datum. If desired, the TNC can also enter the
coordinates into a datum table or the 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 444) to the center of the
first hole
1 .
2 Then the probe moves to the entered measuring height and
probes four points to find the first hole center.
3 The touch probe returns to the clearance height and then to the
position entered as center of the second hole 2 .
4 The TNC moves the touch probe to the entered measuring
height and probes four points to find the second hole center.
5 The touch probe returns to the clearance height and then to the
position entered as center of the third hole 3 .
6 The TNC moves the touch probe to the entered measuring
height and probes four points to find the third hole center.
7 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 472) and saves the
actual values in the Q parameters listed below.
8 If desired, the TNC subsequently measures the datum in the
touch probe axis in a separate probing.
Parameter number Meaning
Q151 Actual value of center in reference axis
Q152 Actual value of center in minor axis
Q153 Actual value of bolt hole circle
diameter