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Analog Inputs, Outputs, and Adjustments
Inputs
There is one analog input channel for the command input. This is a differential input and it is
summed with a TAC feedback amplifier that controls velocity.
Normal operation of the command signal is to apply a + voltage (pin #9) with respect to GND
(pin #11) and get clockwise rotation of the shaft. ±10 volts is then used to control velocity and
the SIG pot is used for velocity adjustments. If the + COMMAND voltage is applied to the -
COMMAND signal input, then an opposite shaft rotation occurs.
The current limit of the amplifier can be adjusted with the CUR pot from 0 (full CCW) to 100%
(peak full CW). It is a good idea during start-up to adjust the CUR pot to its full CCW position
and increase it slowly CW to assure normal operation.
During start-up the BAL adjustment can be used to reduce/stop any low speed CW/CCW drift
caused by imbalance between the external command voltage and the amplifier.
The response adjustment (RESP) is adjusted from CCW to CW to achieve crisp operation.
This should be optimized on the high speed winding.
12
ENCODER
I/O
GND
-AUX
BAL
+AUX
GND
CUR
-COM
+COM
RESP
CUR
TAC
GND
SIG
FLT
SHFT
AUX
SLOW
SPD
ENB
RESET
ANALOG INPUT
WIRING EXAMPLE
GND
}
–AUX SIGNAL
+AUX SIGNAL
GND
}
–COMMAND SIGNAL
+COMMAND SIGNAL
CURRENT
TAC
GND
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