Heidenhain TNC 320 (340 55x-03) Touch Probe Cycles User Manual download pdf (Page 108)

108

3.3 Automatic Workpiece Measurement

Tolerance monitoring

For most of the cycles for workpiece inspection you can have the TNC

perform tolerance monitoring. This requires that you define the

necessary limit values during cycle definition. If you do not wish to

monitor for tolerances, simply leave the 0 (the default value) in the

monitoring parameters.

Tool monitoring

For some cycles for workpiece inspection you can have the TNC

perform tool monitoring. The TNC then monitors whether

 The tool radius should be compensated because of the deviations

from the nominal value (values in Q16x).

 The deviations from the nominal value (values in Q16x) are greater

than the tool breakage tolerance.

Tool compensation

The TNC always compensates the tool radius in the DR column of the

tool table, even if the measured deviation lies within the given

tolerance. You can inquire whether re-working is necessary via

Parameter Q181 in the NC program (Q181=1: must be reworked).

For Cycle 427:

 If an axis of the active working plane is defined as measuring axis

(Q272 = 1 or 2), the TNC compensates the tool radius as described

above. From the defined traversing direction (Q267) the TNC

determines the direction of compensation.

 If the touch probe axis is defined as measuring axis (Q272 = 3), the

TNC compensates the tool length.

This function works only:

 If the tool table is active.

 If tool monitoring is switched on in the cycle: Q330 not

equal to 0.

If you perform several compensation measurements, the

TNC adds the respective measured deviation to the value

stored in the tool table.

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Heidenhain TNC 320 (340 55x-03) Touch Probe Cycles User Manual Page 108