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Stepper motor control with dsPIC DSCs

Posted: 08 Dec 2009     Print Version  Bookmark and Share

Keywords:stepper motor control  development board  dsPIC33F control 

This application note describes how to drive a stepper motor with a dsPIC33F motor control family DSC. The eight PWM channels (six pins from the PWM1 module and two pins from the PWM2 module) are used to control a stepper motor in all possible ways, whether it is bipolar or unipolar, using full step or microstepping, open or closed loop, without the need for external jumpers or complicated logic circuitry.

The dsPICDEM MCSM development board kit (DV330022) was used in this application note. This kit includes the dsPICDEM MCSM development board, stepper motor, power supply and plug-in module (PIM). The hardware topology is very simple, consisting of just the dsPIC DSC, the drivers and two Hbridges.Each MOSFET in the dual H-bridge is controlled by one PWM signal. The powerful PWM module of the dsPIC DSC features independent or complementary control over each of the four PWM pairs, plus an additional override function on each pin, which gives even more control over the power MOSFETs.

View the PDF document for more information.

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