Tool offsets
8.5 Activate 3D tool offsets (CUT3DC..., CUT3DF...)
Job planning
Programming Manual, 03/2006 Edition, 6FC5398-2BP10-1BA0
8-25
8.5.6 3D circumferential milling with limitation surfaces general use
Function
Adaptations of 3D circumferential milling to the conditions for CAD programs
NC programs generated by CAD systems usually approximate the center path of a standard
tool with a large number of short linear blocks. To ensure that the blocks of many part
contours generated in this way map the original contour as precisely as possible, it is
necessary to make certain changes in the parts program.
Suitable measures must be taken to replace important information that would be required for
optimum correction but is not longer available. Here are some typical compensation methods
for critical transitions either
• directly in the parts program or
• while determining the real contour, e.g. by tool infeed.
Applications
In addition to the typical application case for which instead of the standard tool, a real tool
describes the center-point path, cylindrical tools with 3D tool compensation are also
described. In this case the programmed path refers to the contour on the machining surface.
The associated limitation surface is tool-independent. Like with conventional tool radius
compensation, the entire radius if used to calculate the perpendicular offset to the limitation
surface.
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