Driving Stepper Motor with PBL3717

[crhomberg]

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

[HenrikOlsson]

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.