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PPENDIX
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M
ORE
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BOUT
W
IRING
Wiring Servo Motors
DSP Series controllers can control brush servo motors, brushless servo motors, or linear brush/
brushless motors. Basic connections require an analog output signal (from the controller to the
amplifier) and an encoder input (from the motor to the controller).
Velocity/Torque Mode
Most amplifiers support either Velocity mode (voltage control), Torque mode (current control)
or both. The DSP controller can be used with either servo motor/amplifier package. Generally,
velocity mode is more stable than torque mode.
When the amplifier is in Velocity mode, the velocity of the motor is proportional to the analog
input voltage (-10V to +10V). When the amplifier is in Torque mode the current applied to the
motor is proportional to the analog input voltage (-10V to +10V).
Encoder Input
DSP Series controllers accept TTL-level (0V to +5V, 40mA max) encoder input from either dif-
ferential or single-ended encoders. Differential encoders are preferred due to their excellent
noise immunity. When used with differential encoders, the differential line receiver on the con-
Wiring Servo Motors
Velocity/Torque Mode
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Encoder Input
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Brush/Brushless Servo Motors
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Step-and-Direction Controlled Servo Motors
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Wiring Step Motors
Open-Loop Step Motors
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Direction Pulse Synchronization
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Closed-Loop Step Motors
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Mode
Velocity
velocity
of motor
is proportional to
analog input voltage
Torque
current
applied to motor
(-10V to +10V)
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