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4.Operation of the servo control
4.1Inputs
The ISP has 3 inputs: 2 single ended inputs (no.1 at terminal 1 and no.2 at
terminal 5) and one differential input at terminals 3,4.
The current gain of inputs 1 and 2 (current mode) is given by:
8 x Ic x Ki |
|
Gc = | (A/V) |
15 + Ri |
|
Ic - amplifier rated continuous current.
Ri - input resistor in Kohm.
R1 for input 1
R2 for input 2
Ki - position of wiper of trimming potentiometer
Ki=0.33 when trimmer is fully CW.
Ki=1 when trimmer is fully CW.
The current gain of | the differential input for R3=R4 (current mode) is given |
by: |
|
|
|
5.33 x Ic |
|
Gcd = | (A/V) |
R3 |
|
R3 in Kohm |
|
The current gain of the single ended inputs in velocity mode is given by (place the appropriate Gc for each input):
400 x Ic x Ki |
|
Gv = | (A/V) |
(15+Ri)xR6 |
|
Ri,R6 in Kohm |
|
ISP - Rev 6/95
