Detailed description
2.3 Continuous -path mode
Basic logic functions: Continuouspath Mode, Exact Stop, LookAhead (B1)
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Function Manual, 11/2006, 6FC5397-0BP10-2BA0
Effects of path smoothing
•
Interval: t1 - t2
The acceleration and deceleration process between t1 - t2 does not take place because
the lengthening of the machining time without the acceleration process to v12 is less than
the resulting time if a smoothing factor of 80% is applied.
•
Interval: t3 - t5
The acceleration and braking profile between t3 and t5 does not fulfill this condition or
takes longer the parameterized smoothing time: T
AXn
= 2/20 Hz = 100 ms.
Effects of the dynamic response adaptation
•
Interval: t3 - t4
The acceleration process between t3 - t4 is shorter than MIN(T
AXn
) =1/20 Hz = 50 ms and
is therefore executed with an acceleration reduced by an adaptation factor of 3.
•
Interval: up to t1
The acceleration up to t1 left over after path smoothing is stretched to the time period up
to t1' by the dynamic response adaptation.
Conclusion
This example shows the interaction of path smoothing and dynamic response adaptation in
continuous-path mode. Only those acceleration or deceleration processes that were not
eliminated by the path smoothing are subsequently optimized by the dynamic response
adaptation. For this reason, both functions should always be activated, if possible.
Example 3: Effect of adaptation and smoothing the path velocity; acceleration mode:
BRISK
Parameter assignment
$MC_ADAPT_PATH_DYNAMIC[1] = 4
$MC_LOOKAH_SMOOTH_FACTOR = 100%
$MA_LOOKAH_FREQUENCY[AX1] = 10 Hz
T
AX1
= 1/10 Hz = 100 ms
$MA_LOOKAH_FREQUENCY[AX2] = 10 Hz
T
AX2
= 1/10 Hz = 100 ms
$MA_LOOKAH_FREQUENCY[AX3] = 20 Hz
T
AX3
= 1/20 Hz = 50 ms
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 ...