The SDU drives a linear motor in a precision medical image printer, achieving an effective resolution of 20 nm. Measuring only 4”by 4”, this miniature servo drive provides digital current and velocity loops with an integrated power stage. The system operates in velocity mode, executing a motion profile that is communicated over the serial communications link.

 

Key Benefits

·         More accurate, lower-cost replacement for the existing gear-based servo system

·         Precise velocity control results in printed images free of artifacts

·         Frameless servo drive designed to assembled on the moving part of a linear motor

·         Performs a specific motion profile specific to the application

 

Features

Feedback

·         Sine Encoder (A/B)interface with 256x interpolation

o    Incremental Encoder (A/B) can be accommodated with minor modifications

·         Commutation initialization at power up

Servo Control

·         Fully digital current and velocity loops

·         Sinewave commutation provides smooth, precise low-speed control as well as high-speed performance

·         Accurate torque control

·         PDFF velocity loop

·         Programmable velocity loop output filter

·         Selectable 400 Hz filter on the feedback.

Motion Options

·         Motion commanded via serial port instructions

·         Homing to limit switch

·         Motion profile based on precise velocity control

I/O's

·         Positive and negative direction limit switches

Communication

·         Serial communications - RS-232

Robust Design

·         Self-protecting power modules

·         Full protection against short circuit, over-voltage, under-voltage, motor and drive over-temperature, over-current and feedback loss

·         Flexible current foldback protection,

Rating

·         24 VDC bus power supply, 5 VDC logic supply

·         1.4 ARMS continuous and 2.3 ARMS

Mechanical Dimensions

4” (length) x 4” (width)