Functions
2.14 Path jerk for real-time events (channel-specific)
Basic logic functions: Acceleration (B2)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0
35
2.14
Path jerk for real-time events (channel-specific)
2.14.1
Detailed Description
2.14.1.1
General Information
Overview
So that no compromise has to be made between machining-optimized jerk on the one hand
and time-optimized jerk in connection with the following real-time events on the other:
•
NC-STOP/NC-START
•
Feedrate override modifications
•
Modification of the velocity default for "safely reduced velocity" within the context of the
"Safely Integrated" function
the path jerk can be set for the real-time events specified above using a channel-specific
system variable:
$AC_PATHJERK =
path jerk
Path jerk for real-time events will only be active for the duration of the change in velocity in
respect of one of the real-time events specified above.
Limitation
As the jerk is not a physical variable of any relevance to the drive, no limit is imposed on the
jerk set.
Effective
Effective
Path jerk for real-time events is only enabled in AUTOMATIC and MDA operating
modes in conjunction with the following real-time events:
•
NC-STOP/NC-START
•
Override modifications
•
Modification of the velocity default for "safely reduced velocity" within the context
of the "Safely Integrated" function
Ineffective
Path jerk for real-time events is ineffective for changes in the path velocity that are
attributable to path planning during preprocessing for the channel, such as contour
curvatures, corners, kinematic transformation limitations, etc.
Path jerk for real-time events is ineffective if the programmed value is smaller than
the path jerk calculated during preprocessing for the path section concerned.
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 ...