18 QuantumDrive-4000 Manual
91-0027 Rev. E
Copyright © Nutfield Technology, Inc.
6/2010
7.3.4 Velocity Output
The Velocity output signal
(J12, Pin 4)
is the instantaneous angular velocity of the
galvanometer rotor. It is used for tuning the servo drive and to monitor variations in
velocity, which may be important in some applications like raster scanning.
7.3.5 Slew Rate Output
The Slew-Rate output signal
(J12, Pin 6)
is the command signal being passed to the
control loop if the Slew-Rate circuit has been enabled.
7.3.6
Current Monitor
The Current signal (
J12, Pin 7
) is the current that is being sent to the galvanometers
coil. The signal is represented as 1V/Amp of current in the coil.
7.4 Servo Enable Connector (Main Board – J8)
The mating connector is a Molex 51090-0400 connector with (8) Molex 50212-8000
or 50212-8100 pins. The pins should be used with AWG 24–30 wire.
The servo enable input
(J8, Pins 3 and 4)
allows the host control system to remotely
enable or disable the servo driver. When Pin 3 is pulled low by connecting it to the
ground available at Pin 4, the servo is enabled. When Pin 3 is floating, the servo is
disabled and will not move in response to input commands.
NOTE:
This input should not be used as an interlock. The use of a shutter or other
safety measure should be used for protection from laser radiation.
NOTE:
The servo board is shipped with a solder bridge (
R78)
, which disables the
remote servo enable. The solder bridge (R78) must be removed for the remote servo
enable operation to function.
Pin No.
Function
1
Servo Ready High
2
Servo Ready Low
3 Servo
Enable
4 Ground
