What is a cheap and easy bipolar stepper driver.

I want to drive a bipolar stepper one direction and be able to change speed.

Very slow speed. all controled by a 16F872 with a timer function that will trigger a speed change.

Kent

 

Have a look at this http://www.winpicprog.co.uk/pic_tuto...pper_board.htm, it's a simple stepper motor driver board for my tutorials - I haven't written the tutorial yet though :lol:

 

This would work, but I am looking to control a Bipolar Stepper.

thanks
Kent

 

What sized steppers are you driving? Do you want to build from scratch or purchase a complete drive module? If you want to build a stand-alone driver, you may use an L298, L6203 or L6204 driver coupled to an L297 translator.

http://www.hvwtech.com/pages/product...?ProductID=193

If you're feeling adventurous, you can hookup a pair L6203 drivers directly to a 20Mhz PIC18F873 and have the software control the current as well as switch the phases to move the motor. Below is a schematic of a microstep driver I once built. I no longer have the code that runs on it however. It uses the 2 channels of PWM of the PIC16F873.

Attached Images

Driver_139.gif (29.2 KB, 1340 views)

__________________
"Having to do with Motion Control"

 

thanks
I am looking to drive a small stepper, <10v <.35A.
I would like a all in one chip, simple and cheap. I was using the mc3479, but they are hard to find.

Thanks again
Kent

 

The easiest way to drive a step motor is to use Allegro chips.
http://www.allegromicro.com

You only need 1 chip, 4 diodes and a resistor.
I use the UCN5804 but they have a lot of chips for stepper motors.
You change the speed by putting "1" or "0" at the direction pin and changeing the speed by changing your frequency in the step pin.

 

Thanks, I will take a look

Kent