Bipolar Stepper Motor

Ruby

Hi everybody.
I am very new in stepper motors so if please don't laugh at me if i am asking silly questions...
I have lots of stepper motors from printers so i decided to build something.
I am using parallel port ( printer - 25 pin ) to control the step motor. I used CVI to send pulses to uln2003 in order to control unipolar stepper motor but i don't know how to control bipolar and what i need!
Please help me...
Thanks.

ElectricAye

Well, since no one else has answered your question...
You might want to take a look at bipolar stepper motor controllers.

Here is a link with a slide show that helps explain the different kinds of stepper motor controllers:

http://dkc1.digikey.com/us/en/tod/STMicroelectronics/StepperFundamentals_NoAudio/Stepper_Fundamentals_NoAudio.swf

I recently built a stepper motor controller using a chip, L6208. I had no idea what I was doing but just shamelessly followed the instructions in their data sheet.

I went with this L6208 because it happened to come in a DIP (powerdip24) version that I could solder with my limited skills. And I've not been exceeding 2 amps on the motor.

The data sheets for the L6208 are here:

www.st.com/stonline/products/literature/ds/7514.pdf
www.st.com/stonline/books/pdf/docs/8607.pdf

You might learn a lot from just reading the data sheet.

Also, because this is a general question, you might ask a moderator to move it to the General Discussion forum and open it up for better answers than mine.

PJAllen

Couldn't be bothered to bookmark his Subject either
http://forums.parallax.com/showthread.php?128909-uln2003