25A Series
A-8
SWITCH FUNCTIONS:
SETTING
SWITCH
FUNCTION DESCRIPTION
ON
OFF
1
Internal voltage feedback
On
Off
2
It is recommended to leave SW2 in OFF
position.
Shorts out the current
loop integrator
capacitor.
Current loop
integrator operating
3
This capacitor normally ensures "error-free"
operation by reducing the error-signal (output of
summing amplifier) to zero.
Shorts out the outer
velocity/voltage loop
integrator capacitor
Velocity/Voltage
integrator operating
4
Offset / test. Controls sensitivity of the "offset"
pot. Used as an on-board reference signal in
test mode.
Test
Offset
POTENTIOMETER FUNCTIONS:
POTENTIOMETER
DESCRIPTION
TURNING CW
Pot 1
Loop gain adjustment in voltage & velocity modes. Turn this pot
fully ccw in current mode.
Increases loop
gain
Pot 2
Current limit. It adjusts both continuous and peak current limit by
maintaining their ratio (50 %).
Increases current
limit
Pot 3
Reference gain. It adjusts the ratio between input signal and
output variables (voltage, current, or velocity).
Increases
reference input
gain
Pot 4
Offset / test. Used to adjust any imbalance in the input signal or
in the amplifier. When SW4 (DIP switch) is ON, the sensitivity of
this pot is greatly increased thus it can be used as an on-board
signal source for testing purposes. See section "G".
N/A
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