Siemens SINUMERIK 802D, Руководство по программированию и эксплуатации

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Programming
10.14 Multiple feedrate values in one block
Cylindrical grinding
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Programming and Operating Manual, 07/2009, 6FC5398-4CP10-2BA0
10.14 Multiple feedrate values in one block
Function
The "Several feedrates in one block" function can be used independent of external analog
and/or digital inputs to activate
●
Different feedrates of an NC block,
● dwell time, and
● Retraction
in synchronism with the movement.
The hardware input signals are combined in one input byte.
Programming
F2=... F3=... In addition to the path feed, you can program up to 2
further feedrates in the block; non-modal
ST=... Dwell time (for grinding technology: sparking-out time);
non-modal
SR=... Return path; non modal. The unit for the retraction path
refers to the current valid unit of measurement (mm or
inch).
FMA [2,x] =...
FMA[3,x]=... In addition to the path feed, you can program up to 2
further feedrates per axis in the block; non modal
STA=... Axial dwell time (for grinding technology: sparking-out
time); non-modal
SRA=... Axial return path; non-modal
FMA and F value
The axial feedrate (FMA value) or path feedrate (F value) corresponds to 100% feedrate.
You can use this function to realize feedrates that are smaller than or equal to the axial
feedrate or the path feedrate.
Note
If feedrates, dwell time or return path are programmed for an axis on account of an external
input, this axis must in this block must not be programmed as POSA axis (positioning axis
over multiple blocks).
Look Ahead is also active for multiple feedrates in one block. In this way, the current
feedrate is restricted by the Look Ahead value.