HEIDENHAIN TNC 620 User Manual page 41

9.9 Entering formulas directly.................................................................................................................. 357
Entering formulas.................................................................................................................................. 357
Rules for formulas.................................................................................................................................359
Example of entry...................................................................................................................................360
9.10 String parameters............................................................................................................................... 361
String processing functions.................................................................................................................. 361
Assign string parameters...................................................................................................................... 362
Chain-linking string parameters.............................................................................................................362
Converting a numerical value to a string parameter.............................................................................363
Copying a substring from a string parameter.......................................................................................364
Reading system data............................................................................................................................ 365
Converting a string parameter to a numerical value.............................................................................366
Testing a string parameter.................................................................................................................... 367
Finding the length of a string parameter..............................................................................................368
Compare alphabetic priority.................................................................................................................. 369
Reading out machine parameters......................................................................................................... 370
9.11 Preassigned Q parameters................................................................................................................. 373
Values from the PLC: Q100 to Q107....................................................................................................373
Active tool radius: Q108........................................................................................................................373
Tool axis: Q109......................................................................................................................................373
Spindle status: Q110............................................................................................................................. 374
Coolant on/off: Q111............................................................................................................................. 374
Overlap factor: Q112............................................................................................................................. 374
Unit of measurement for dimensions in the program: Q113................................................................374
Tool length: Q114.................................................................................................................................. 374
Coordinates after probing during program run..................................................................................... 375
Deviation between actual value and nominal value during automatic tool measurement with the TT
130.........................................................................................................................................................375
Tilting the working plane with mathematical angles: rotary axis coordinates calculated by the
TNC........................................................................................................................................................375
Measurement results from touch probe cycles................................................................................... 376
9.12 Programming examples..................................................................................................................... 378
Example: Ellipse.................................................................................................................................... 378
Example: Concave cylinder machined with spherical cutter.................................................................380
Example: Convex sphere machined with end mill................................................................................382
HEIDENHAIN | TNC 620 | ISO Programming User's Manual | 9/2016
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