Driving Stepper Motor with PBL3717

Hi all,

Has anyone any experience using the PBL3717 stepper motor driver with a PIC?
I have a bi-polar stepper motor connected and have successfully driven it at full step mode and half step but I need quarter steps. The datasheet does not give the whole sequence for quarter stepping.

Regards

Chris

Hi,
To do smaller steps than halfsteps with that chip you need to change the voltage reference for the current so that the current in the two windings form a sin/cos relationship to each other. You can do that with a lookuptable and a DAC or lowpass filtered PWM maybe but a newer chip would probably be better.

/Henrik Olsson.