Heidenhain TNC 320 (340 55x-03) Touch Probe Cycles User Manual download pdf (Page 94)

3.2 Presetting automatically

DATUM IN TOUCH PROBE AXIS (touch probe

cycle 417, DIN/ISO: G417)

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 The TNC positions the touch probe to the starting points at rapid

traverse (value from FMAX column) following the positioning logic

(see “Running touch probe cycles” on page 21) to the

programmed starting 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 1 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 “Saving the calculated datum”

on page 64) and saves the actual values in the Q parameters listed

below

8 1st measuring point in 1st axis Q263 (absolute):

coordinate of the first touch point in the reference

axis of the working plane.

8 1st measuring point in 2nd axis Q264 (absolute):

coordinate of the first touch point in the minor axis of

the working plane.

8 1st measuring point in 3rd axis Q294 (absolute):

coordinate of the first touch point in the touch probe

axis.

8 Setup clearance Q320 (incremental): Additional

distance between measuring point and ball tip. Q320

is added to column SET_UP.

8 Clearance height Q260 (absolute): Coordinate in the

touch probe axis at which no collision between tool

and workpiece (fixtures) can occur.

Q264

Q263

Q260

Q294

MP6140

Q320

Parameter number Meaning

Q160 Actual value of measured point

Before programming, note the following

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.

1 2 ... 89 90 91 92 93 94 95 96 97 98 99 ... 164 165

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