3-68
Engineering Guide CDA3000
3 Selection of inverter module
Positioning accuracy with Start/Stop operation as a function of
motor control method
ϕ
F
=
ω
..
t
RF
ϕ
F
= Positioning error
in °
ω
= Velocity
in mm/s
tRF = Response error
(terminal
scan cycle) in s
(1) Scan cycle of control terminals (CDA3000 = 1 ms) on inverter
(t
RF
=response error)
(2) Destination position 1
(stop signal comes together with read-in
of control signals on inverter)
(3) Destination position 2
(Stop signal comes directly after read-in of
control signals on inverter)
(4) Slip range
(depending on control mode the braking ramp
is slip-dependent)
Figure 3.30
Start/stop positioning
Property
VFC
Voltage
Frequency
Control
SFC
Sensorless Flux
Control
FOR
Field-Oriented
Regulation
Braking time 100 ms, external moment of inertia = motor moment of inertia
Standard motor (U
N
= 400 V)
1500 rpm to 0 rpm
10°
9°
9°
Standard motor (U
N
= 400 V)
1500 rpm to 0 rpm
4°
4°
3°
Servomotor (U
N
= 330 V)
1500 rpm to 0 rpm
12°
10°
8°
Servomotor (U
N
= 330 V)
1500 rpm to 0 rpm
6°
5°
4°
Braking time 500 ms, external moment of inertia = motor moment of inertia
Table 3.33
Typical positioning errors referred to the motor shaft in °
(1)
(2)
(3)
(4)
t
Содержание CDA3000
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Страница 315: ...A 24 Engineering Guide CDA3000 Appendix A Formula bank Movement by rack Movement by cable reel Movement by spindle ...
Страница 317: ...A 26 Engineering Guide CDA3000 Appendix A Formula bank Indexing table with eccentric loads ...
Страница 336: ...Engineering Guide CDA3000 A 45 DE EN FR 1 2 3 4 5 6 A Appendix B Practical working aids for the project engineer ...