Functions
2.2 Constant travel time (channel-specific)
Basic logic functions: Acceleration (B2)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0
13
2.2
Constant travel time (channel-specific)
2.2.1
Detailed Description
2.2.1.1
General Information
Overview
In the case of acceleration without jerk limitation, sudden acceleration of 2 * a
max
occurs on
switchover between acceleration and braking. In order to avoid this sudden acceleration, a
channel-specific constant travel time can be programmed. The constant travel time defines
the time taken to traverse between the acceleration and braking phases at constant velocity:
MD20500 $MC_CONST_VELO_MIN_TIME (minimum time with constant velocity)
Note
The constant travel time is ineffective:
•
Active function: Look Ahead
•
In traversing blocks with a travel time that is less or equal to the interpolation cycle time.
W
W
W
W
W
W
DPD[
D
DPD[
YPD[
W
W
Y
Figure 2-2
Schematic for abrupt acceleration
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 ...