Heidenhain TNC 320 (340 55x-03) Touch Probe Cycles User Manual download pdf (Page 82)

3.2 Presetting automatically

8 Center in 1st axis Q321 (absolute value): Center of

the stud in the reference axis of the working plane.

8 Center in 2nd axis Q322 (absolute value): Center of

the stud in the minor axis of the working plane. If you

program Q322 = 0, the TNC aligns the hole center to

the positive Y axis. If you program Q322 not equal to

0, then the TNC aligns the hole center to the nominal

position.

8 Nominal diameter Q262: Approximate diameter of the

stud. Enter a value that is more likely to be too large

than too small.

8 Starting angle Q325 (absolute): Angle between the

reference axis of the working plane and the first touch

point.

8 Stepping angle Q247 (incremental): Angle between

two measuring points. The algebraic sign of the

stepping angle determines the direction of rotation

(- = clockwise) in which the touch probe moves to the

next measuring point. If you wish to probe a circular

arc instead of a complete circle, then program the

stepping angle to be less than 90°.

Q322

Q321

Q262

Q325

Q247

Q261

Q260

MP6140

Q320

The smaller the angle, the less accurately the TNC can

calculate the datum. Minimum input value: 5°.

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Heidenhain TNC 320 (340 55x-03) Touch Probe Cycles User Manual Page 82