Anti-Resonance Introduction - Motion DMD870 User Manual

DMD870 Digital Stepper Drive User's Manual
PeakCur: Peak Current. The value is the peak current to the selected motor and can be set
from 0.5 to 5.6 A. The user can set the peak current with ProTuner or DIP switches, see
more information about setting output current of the drive in Section 5 "CONNECTING THE
MOTOR" and Section 7 "MICROSTEP RESOLUTION AND DRIVE OUTPUT CURRENT".
MicroStep: Microstep Resolution. The value is Drive's microstep resolution setting and can
be set from 1 to 512. The user can set the microstep with ProTuner or DIP switches, See
more information about setting output current of the Drive in Section 7 "MICROSTEP
RESOLUTION AND DRIVE OUTPUT CURRENT".
ElecDamp: Electronic Damping Coefficient. The electronic damping restrain resonance of
the system and prevent amplitude of the oscillation from increasing to the extend that it
makes the motor out of control. The optimal value depends on the system, and the default
value is 3000.
CommandType: Command Type of control signal, including PUL/DIR and CW/CCW. Set this
parameter according to Command Type of motion controller.
ActiveEdge: Active Edge. The user can set the triggered edge of pulse command signal in this
panel. When the Drive works in CW/CCW mode, no matter what level is at fixed level
terminal, the Drive can works properly.
DirectionDef: Direction Definition. Relate the default running direction to a HIGH level input
in DIR or Low level input in DIR. This panel is used for PUL/DIR command type only. Please
note that the default direction is also related to motor coil connections.

Anti-Resonance Introduction

Stepper motors are highly resonant, which results in vibration and ringing. The ringing
utilizes a large fraction of the motor's available torque - thereby wasting performance.
Furthermore, at mid-range velocities, the resonance can become so severe that the motor
loses synchronisation and stalls. The DMD870 drive provides robust anti-resonance control
to stop the vibrations and maintain equilibrium. This feature requires that the drive be
configured with respect to the total inertia in the system. If set improperly, the
effectiveness of the feature may be diminished.
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