Emerson EZMotion User Manual page 100

= Index 0
= Index 1
V
1250
500
Compound Index
User Ramps
Figure 88:
1. Index.1.Accel specified by user is used to decelerate from Index.0.Vel, to Index.1.Vel, but overshoots since ramp is
not aggressive enough to reach Index.1.Vel within Index.1.Dist of 3 Revs.
2. Index.1 begins at Index.1.Vel but since Index.1.Decel specified by user is not aggressive enough to decelerate to zero
velocity within Index.1.Dist of 3 Revs slight overshoot occurs.
3. Index.1 begins at Index.0.Vel and ramp is automatically calculated to reach zero speed within Index.1.Dist of 3 Revs
without any overshoot. If Index.1.Accel and or Decel were aggressive enough to reach zero speed within 3 Revs, they
would have been used instead of automatically calculating the ramp.
4. Index.1 begins at Index.1.Vel and ramps is automatically calculated to reach zero speed within Index.1.Dist of 3 Revs
without any overshoot. If Index.1.Decel was aggressive enough to reach zero speed within 3 Revs, it would have been
used instead of automatically calculating the ramp.
88
Distance
(Revs)
Index 0 20
Index 1 3
1
Blended Index
User Ramps
Ramps Examples of a Fast Index to a Slower Index
Distance
(Revs)
Index 0 5
Index 1 20
www.controltechniques.com
Velocity Accel
(RPM) (RPM/sec)
1250 2000
500 500
2
Compound Index
Auto Ramps
Velocity Accel
(RPM) (RPM/sec)
500 1000
1250 2000
Decel
(RPM/sec)
3000
500
3
4
Blended Index
Auto Ramps
Decel
(RPM/sec)
1000
2000
EZMotion User/Programming Guide
t
Revision: A8