Overview of External Amplifiers
The amplifiers should be suitable for the motor and may be linear or pulse-width-modulated. An amplifier may
have current feedback, voltage feedback or velocity feedback.
Amplifiers in Current Mode
Amplifiers in current mode should accept an analog command signal in the ±10 volt range. The amplifier gain
should be set such that a +10V command will generate the maximum required current. For example, if the motor
peak current is 10A, the amplifier gain should be 1 A/V.
Amplifiers in Velocity Mode
For velocity mode amplifiers, a command signal of 10 volts should run the motor at the maximum required speed.
The velocity gain should be set such that an input signal of 10V runs the motor at the maximum required speed.
Stepper Motor Amplifiers
For step motors, the amplifiers should accept step and direction signals.
Galil Internal Amplifiers and Drivers
With the DMC-40x0 Galil offers a variety of Servo Amplifiers and Stepper Drivers that are integrated into the same
enclosure as the controller. Using the Galil Amplifiers and Drivers provides a simple straightforward motion control
solution in one box. Instead of having to route a +/-10V motor command signal, or STEP/DIR to some external box,
all the wiring is taken care of internally. In addition, Galil's internal amplifiers reside inside the same box as the
controller, ICM, and communication board (see Part Numbers, pg 2) saving real estate space and the hassle of
configuring a separate device.
A full list of amplifier specifications and details can be found in the Integrated Components, starting on pg 211.
Chapter 1 Overview ▫ 6
DMC-40x0 User Manual