Special Motion Commands
4.6 Settable path reference (SPATH, UPATH)
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Programming Manual, 07/2010, 6FC5398-2BP40-0BA0
257
4.6 Settable path reference (SPATH, UPATH)
Function
During polynomial interpolation, the user may require two different relationships between the
velocity determining FGROUP axes and the other path axes: The latter should either be
controlled, synchronized to the path S or synchronized to the curve parameter U of the
FGROUP axes.
Both types of path interpolation are used in different applications and can be set/switched
over using the two modal language commands
SPATH and UPATH contained in the 45th G code
group.
Syntax
SPATH
UPATH
Meaning
SPATH: Path reference for FGROUP axes is arc length
UPATH: Path reference for FGROUP axes is curve parameter
Note
UPATH and SPATH also define the interrelationship of the F word polynomial (FPOLY, FCUB, FLIN)
with path motion.
General conditions
The path reference set is of no importance:
● for linear and circular interpolation
● in thread blocks
● if all path axes are contained in FGROUP.
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