Detailed description
2.3 Feedrate control
Basic logic functions: Feeds (V1)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0
47
If feedrates, a sparking out time (dwell) or retraction path are programmed for an axis on
account of an external input, this axis must not be programmed as a
POSA
axis in this block
(positioning axis beyond end of block).
When the input for the sparking out time or retraction path is activated, the distancetogo for
the path axes or the particular single axis is deleted and the dwell or retraction is started.
Note
The unit for the retraction path refers to the current valid unit of measurement (mm or inch).
The reverse stroke is always made in the opposite direction to the current motion.
SR
/
SRA
always programs the value for the reverse stroke. No sign is programmed.
It is also possible to poll the status of an input for synchronous commands of various axes.
Look Ahead is also active for multiple feedrates in one block. In this way, the current
feedrate is restricted by the Look Ahead value.
Application
Typical applications include:
•
Analog or digital calipers
Depending on whether the external inputs are analog or digital, various feedrate values, a
dwell and a retraction path can be activated. The limit values are defined via the setting
data.
•
Switching from infeed to working feedrate via proximity switch
Summary of Contents for SINUMERIK 840D sl
Page 282: ...Index Basic logic functions Acceleration B2 64 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Page 388: ...Basic logic functions Travel to fixed stop F1 Function Manual 11 2006 6FC5397 0BP10 2BA0 52 ...
Page 962: ...Index Basic logic functions Emergency Stop N2 20 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Page 1704: ...Constraints Basic logic functions Spindles S1 94 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Page 1716: ...Index Basic logic functions Spindles S1 106 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Page 1996: ...Index Basic logic functions Tool Offset W1 208 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Page 2150: ...Table of contents Basic logic functions Appendix 4 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Page 2184: ...Glossary Basic logic functions Appendix 38 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...