Heidenhain TNC 320 (340 55x-03) Touch Probe Cycles User Manual download pdf (Page 91)

HEIDENHAIN TNC 320 91

3.2 Presetting automatically

DATUM CIRCLE CENTER (touch probe cycle 416,

DIN/ISO: G416)

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 The TNC positions the touch probe at rapid traverse (value from

column FMAX) and with positioning logic (see “Running touch

probe cycles” on page 21) to the point entered as 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 “Saving the calculated datum”

on page 64) 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

Before programming, note the following

Before a cycle definition you must have programmed a

tool call to define the touch probe axis.

1 2 ... 86 87 88 89 90 91 92 93 94 95 96 ... 164 165

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Heidenhain TNC 320 (340 55x-03) Touch Probe Cycles User Manual Page 91