Specifications

SPECIFICATIONS
ADVANCED MICRO CONTROLS INC.
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SD17063 Features Overview
The following section gives brief descriptions of the SD17063 settings. They are presented so that you can
familiarize yourself with the drive. More in-depth descriptions are given in the Chapter 3: SD17063
SWITCH SETTINGS, starting on page 17.
Pulse Train Input
Most indexers output their directional pulses in one of two formats, CW/CCW or Pulse and Direction. By
default, the SD17063 uses the CW/CCW format, but can be configured for either.
Anti-Resonance
All stepper motor systems are subject to mid-frequency resonance which is the result of motor generated
back-EMF. The SD17063’s Anti-Resonance feature, which is enabled by default, modifies the motors current
waveforms to compensate for the back-EMF which results in smoother operation at resonant speeds.
Anti-Resonance Phase
This feature is a new addition available in the SD17063 Rev. A or B only. This new feature allows you to tune
the Anti-Resonance feature to your systems inertia.
Current Loop Gain
This new feature, available on the SD17063 Rev. A or B only, sets the gain of the current loop used to control
the motor current. Its Typical setting will work in most systems. Reducing the gain will probably help if your
motor is heavily loaded and stalling during a low speed move, or if your motor has a very low inductance
value and is emitting a high frequency sound (≈10 KHz) while powered. This setting only affects the motor
when its velocity is less than or equal to 3rps.
Current Control
This new feature, available on the SD17063 Rev. A or B only, allows you to choose RMS or Peak current con-
trol. The default setting of RMS means that the motors full torque is always available. If you set Current
Control to Peak and microstep the motor, the available torque at low speeds will be reduced by up to 30%.
Idle Current Reduction
This feature reduces current to the motor when it is idle, which significantly reduces motor heating. It has
been updated on the SD17063 Rev. A or B. Three setting are now available. To 0% removes the motor cur-
rent when it is idle. No holding torque is available. To 50% reduces the current to one-half its maximum
value. Not Reduced keeps the full current applied to the motor for maximum holding torque.
Output Waveform
This feature allows you to compensate for problems associated with a motor’s physical characteristics by
altering the shape of the current waveform used to drive the motor. This feature is only used when you are
half-stepping or micro-stepping the motor.
Step Resolution
The Step Resolution feature sets the number of steps needed to complete one rotation. Standard stepper
motors have an inherent resolution of 1.8° per step. The SD17063 can further divide this 1.8° step by control-
ling the current through each motor winding. This is commonly called microstepping. The maximum resolu-
tion of the SD17063 is 50,800 steps per turn. Your step resolution choice is usually dependent on your
application.
Motor Current
The SD17063 can have its motor output current set from 0.1 to 6.3 amps in 0.1 amp increments. The exact
current setting is based on your motor’s size and application requirements. Motors that are rated for more
than 6.3 amps can be used with the SD17063. The maximum current through the motor will be limited to 6.3
amps.