HEIDENHAIN TNC 640 User Manual page 615

Multiple-Axis Machining | Inclined-tool machining in a tilted plane (option 9)
13.3 Inclined-tool machining in a tilted plane
(option 9)
Function
In combination with M128 and the new PLANE functions,
tool machining on a tilted machining plane is now possible. Two
possibilities are available for definition:
Inclined-tool machining via incremental traverse of a rotary axis
Inclined-tool machining via normal vectors
Inclined-tool machining in a tilted machining plane only
works with spherical cutters. If you are using 45° swivel
heads and tilting tables, you can also define the incline
angle as a spatial angle. Use FUNCTION TCPM for this
purpose.
Further information:
page 625
Inclined-tool machining via incremental traverse of a
rotary axis
Retract the tool
Define any PLANE function; consider the positioning behavior
Activate M128
Via a straight-line block, traverse to the desired incline angle in
the appropriate axis incrementally
Example
...
12 L Z+50 R0 FMAX
13 PLANE SPATIAL SPA+0 SPB-45 SPC+0 MOVE DIST50
F1000
14 M128
15 L IB-17 F1000
...
HEIDENHAIN | TNC 640 | Conversational Programming User's Manual | 10/2017
"FUNCTION TCPM (option 9)",
inclined-
Position at clearance height
Define and activate the PLANE function
Activate M128
Set the incline angle
Define machining in the tilted working plane
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