upon reset. This allows the motor to function immediately upon power up. The Hall effect sensors
also provide a method for setting the precise commutation phase. Chapter 2 describes the proper
connection and procedure for using sinusoidal commutation of brushless motors.
Stepper Motor with Step and Direction Signals
The DMC-2x00 can control stepper motors. In this mode, the controller provides two signals to
connect to the stepper motor: Step and Direction. For stepper motor operation, the controller does not
require an encoder and operates the stepper motor in an open loop fashion. Chapter 2 describes the
proper connection and procedure for using stepper motors.
Overview of 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.
4 •Chapter 1 Overview DMC-2X00
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