HEIDENHAIN TNC 620 - Page 43

Contents
HEIDENHAIN | TNC 620 | Conversational Programming User's Manual | 10/2017
43
7 Programming Contours............................................................................................................... 271
7.1 Tool movements.................................................................................................................................272
Path functions...................................................................................................................................... 272
FK free contour programming (option 19)........................................................................................... 272
Miscellaneous functions M..................................................................................................................272
Subprograms and program section repeats........................................................................................ 273
Programming with Q parameters........................................................................................................ 273
7.2 Fundamentals of path functions...................................................................................................... 274
Programming tool movements for workpiece machining.................................................................... 274
7.3 Approaching and departing a contour............................................................................................ 278
Starting point and end point................................................................................................................278
Overview: Types of paths for contour approach and departure...........................................................280
Important positions for approach and departure................................................................................. 281
Approaching on a straight line with tangential connection: APPR LT..................................................283
Approaching on a straight line perpendicular to the first contour point: APPR LN.............................. 283
Approaching on a circular path with tangential connection: APPR CT.................................................284
Approaching on a circular path with tangential connection from a straight line to the contour:
APPR LCT............................................................................................................................................. 285
Departing in a straight line with tangential connection: DEP LT......................................................... 286
Departing in a straight line perpendicular to the last contour point: DEP LN...................................... 286
Departing on a circular path with tangential connection: DEP CT.......................................................287
Departing on a circular arc tangentially connecting the contour and a straight line: DEP LCT.............287
7.4
Path contours  Cartesian coordinates.......................................................................................... 288
Overview of path functions................................................................................................................. 288
Straight line L.......................................................................................................................................289
Inserting a chamfer between two straight lines..................................................................................290
Rounded corners RND.........................................................................................................................291
Circle center CC...................................................................................................................................292
Circular path C around circle center CC.............................................................................................. 293
Circle CR with defined radius..............................................................................................................294
Circle CT with tangential connection...................................................................................................296
Example: Linear movements and chamfers with Cartesian coordinates.............................................297
Example: Circular movements with Cartesian coordinates................................................................. 298
Example: Full circle with Cartesian coordinates.................................................................................. 299
7.5 Path contours – Polar coordinates................................................................................................... 300
Overview.............................................................................................................................................. 300
Datum for polar coordinates: pole CC................................................................................................. 301
Straight line LP.....................................................................................................................................301
Circular path CP around pole CC.........................................................................................................302
Circle CTP with tangential connection.................................................................................................302
Helix......................................................................................................................................................303