HEIDENHAIN TNC 640 (34059x-01) - Manual (Page 22)

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8.10 Entering Formulas Directly ..... 295
Entering formulas ..... 295
Rules for formulas ..... 297
Programming example ..... 298
8.11 String Parameters ..... 299
String processing functions ..... 299
Assigning string parameters ..... 300
Chain-linking string parameters ..... 301
Converting a numerical value to a string parameter ..... 302
Copying a substring from a string parameter ..... 303
Converting a string parameter to a numerical value ..... 304
Checking a string parameter ..... 305
Finding the length of a string parameter ..... 306
Comparing alphabetic priority ..... 307
Reading machine parameters ..... 308
8.12 Preassigned Q Parameters ..... 311
Values from the PLC: Q100 to Q107 ..... 311
Active tool radius: Q108 ..... 311
Tool axis: Q109 ..... 312
Spindle status: Q110 ..... 312
Coolant on/off: Q111 ..... 312
Overlap factor: Q112 ..... 312
Unit of measurement for dimensions in the program: Q113 ..... 313
Tool length: Q114 ..... 313
Coordinates after probing during program run ..... 313
Deviation between actual value and nominal value during automatic tool measurement with the TT 130 ..... 314
Tilting the working plane with mathematical angles: rotary axis coordinates calculated by the TNC ..... 314
Measurement results from touch probe cycles (see also User’s Manual for Touch Probe Cycles) ..... 315
8.13 Programming Examples ..... 317