Heidenhain TNC 320 (340 55x-03) Touch Probe Cycles User Manual download pdf (Page 112)

112

3.3 Automatic Workpiece Measurement

MEASURE ANGLE (touch probe cycle 420,

DIN/ISO: G420)

Touch probe cycle 420 measures the angle that any straight surface

on the workpiece describes with respect to the reference axis of the

working plane.

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 direction opposite the defined traverse

direction.

2 Then the touch probe moves to the entered measuring height and

probes the first touch point at the probing feed rate (column F).

3 Then the touch probe moves to the next starting position 2 and

probes the second position.

4 The TNC returns the touch probe to the clearance height and saves

the measured angle in the following Q parameter:

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 2nd measuring point in 1st axis Q265 (absolute):

coordinate of the second touch point in the reference

axis of the working plane

8 2nd measuring point in 2nd axis Q266 (absolute):

coordinate of the second touch point in the minor axis

of the working plane

8 Measuring axis Q272: Axis in which the

measurement is to be made:

1: Reference axis = measuring axis

2: Minor axis = measuring axis

3: Touch probe axis = measuring axis

Q266

Q264

Q263

Q272=1

Q265

Q272=2



Q267

MP6140

Q320

Parameter number Meaning

Q150 The measured angle is referenced to the

reference axis of the machining plane.

Before programming, note the following

Before a cycle definition you must have programmed a

tool call to define the touch probe axis.

1 2 ... 107 108 109 110 111 112 113 114 115 116 117 ... 164 165

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