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ISP - Rev 6/95
4. Operation of the servo control
4.1 Inputs
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