Siemens SINUMERIK 828D Programming Manual page 239

Further information
Sequence of motions
1. Approach starting point
2. Execute the full circles programmed with
3. Approach circle end position, e.g. as part rotation.
4. Execute steps 2 and 3 across the infeed depth.
The pitch, with which the helix is to be machined is calculated from the number of full circles
plus the programmed circle end position (executed across the infeed depth).
Programming the end point for helical interpolation
Please refer to circular interpolation for a detailed description of the interpolation parameters.
Programmed feedrate
For helical interpolation, it is advisable to specify a programmed feedrate override (
FGROUP
For more information please refer to the Path behavior section.
Fundamentals
Programming Manual, 07/2010, 6FC5398-1BP40-0BA0
can be used to specify which axes are to be traversed with a programmed feedrate.
9.7 Helical interpolation (G2/G3, TURN)
.
TURN=
Motion commands
).
CFC
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