HEIDENHAIN TNC 640 User Manual page 50

Assign string parameters..................................................................................................................... 434
Chain-linking string parameters............................................................................................................435
Converting a numerical value to a string parameter............................................................................436
Copying a substring from a string parameter......................................................................................437
Reading system data........................................................................................................................... 438
Converting a string parameter to a numerical value............................................................................439
Testing a string parameter................................................................................................................... 440
Finding the length of a string parameter.............................................................................................441
Comparing alphabetic priority.............................................................................................................. 442
Reading out machine parameters........................................................................................................ 443
10.11 Preassigned Q parameters................................................................................................................ 446
Values from the PLC: Q100 to Q107...................................................................................................446
Active tool radius: Q108.......................................................................................................................446
Tool axis: Q109.....................................................................................................................................447
Spindle status: Q110............................................................................................................................ 447
Coolant on/off: Q111............................................................................................................................ 447
Overlap factor: Q112............................................................................................................................ 447
Unit of measurement for dimensions in the program: Q113...............................................................447
Tool length: Q114................................................................................................................................. 448
Coordinates after probing during program run.................................................................................... 448
Deviation between actual value and nominal value during automatic tool measurement with, for
example, the TT 160............................................................................................................................ 448
Tilting the working plane with spatial (workpiece) angles instead of spindle head angles: Coordinates
for rotary axes calculated by the control............................................................................................. 448
Measurement results from touch probe cycles.................................................................................. 449
Checking the setup situation: Q601.....................................................................................................450
10.12 Programming examples.................................................................................................................... 451
Example: Ellipse................................................................................................................................... 451
Example: Concave cylinder machined with spherical cutter................................................................453
Example: Convex sphere machined with end mill...............................................................................455
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HEIDENHAIN | TNC 640 | ISO Programming User's Manual | 10/2017
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