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NI 9503 User Manual and Specifications
NI 9503 Hardware Overview
The NI 9503 is a stepper motor drive for use with 2-phase hybrid
stepper motors in either bipolar or unipolar winding configuration.
It uses software-programmable control algorithms that reduce
torque ripple, dampen high-speed resonance, and implements
smoother motion during microstepping.
The NI 9503 returns the motor current and bus voltage to the
LabVIEW FPGA module for use in a current PI loop and
antiresonance algorithms. NI 9503 status information such as drive
status and drive faults are also returned to the LabVIEW FPGA
module. Refer to the
NI 9503
topic in the
LabVIEW Help
, available
by selecting
Help»LabVIEW Help
, for information about the
available status information.
Note
National Instruments offers NEMA 8, NEMA 11,
NEMA 14, NEMA 17 and NEMA 23 stepper motors
compatible with the NI 9503. Go to
ni.com/motion/
s
tepper
for more information about NI stepper motors.
The NI 9503 reduces torque ripple at speeds near 1 RPS that are
caused by fourth harmonic disturbances. The torque ripple
smoothing algorithm is software programmable and can be tuned