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16
7.2 Command Input Connector (Main Board - J3)
The mating connector is a Molex 43025-0400 connector with (4) Molex 43030-0003
or 43030-0009 pins. The pins should be used with AWG 20–24 wire.
The analog command input comes in on connector (J3). For differential inputs, Pin 1 is
the positive (+) command input, Pin 2 is ground, and Pin 3 is the negative (-) command
input. Switching the input polarity of Pins 1 and 3 will reverse the rotation of the
galvanometer shaft.
The input can be configured for single-ended or differential operation.
IMPORTANT NOTE: For single-ended operation Pin 1 is the positive (+)
command input, Pin 2 is the ground, and Pin 3 is also tied to ground. This is done
by applying a solder bridge to R77
Input Command Connector – J3 (see Servo Driver Drawing)
An external offset adjust is provided on pin 4 of the input command connector. This
option is generally not used and this pin may be left floating. The offset is adjusted
internally to zero at the factory.
For certain 3-axis applications it may be desirable to externally calibrate the third axis
(focus) by introducing an analog dc offset to pin 4. Up to ±10 volts may be applied;
however the combination of command and offset can not exceed the normal range of
motion.
91-0027 Rev. E
QuantumDrive-4000 Manual
Pin No.
Function
1
+ Command
2
Ground
3
- Command
4
Offset Adjust *
* Introduced in Release 2
Copyright © Nutfield Technology, Inc.
6/2010
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