I need references about stepper motors. Catalogs would help, but I need manuals, resources.

Do you have any idea on how to use a 3.5" floppy drive stepper? Do you know its specifics, parameters or description?

Please mail me, I would really appreciate it. I'm currently researching on stepper motor controllers and robotics...

 

I've used a number of products from a company called RMV who's into steppers and robotic controls. Give them a looks at "www.rmv.com":www.rmv.com

Mark Hill

 

Tell me how many wires you have... and what colours they are and I might be able to help ya.

"www.allegromicro.com/sf/5804/":http://www.allegromicro.com/sf/5804/ thats the IC I usually use to control them. On the lower left hand corner of the site you should be able to order free samples of the IC. Make sure ya order the right package.. you want UCN5804B, not the LB.

Regards,

Steve
[email protected]

 

Steve : Go to "WWW.compumotor.com":http://www.compumotor.com and they have excellent literature and diagrams on your subject
Gord

 

The last 3.5 floppy stepper motor I messed was while helping one of my kids do a science project The motor had the stepper driver built in. I just connected 12Vdc (from two lantern batteries) and viola, we had a spining color wheel. I doubt that the floppy drive motors have varied much since then.

 

If you're looking for general information, the front of the Parker/Compumotor catalog has served me well as a reference on several occasions.

They build the theory behind a stepper up from near zero, and it's pretty easy to read through.

Ashley

 

Hi, If you ran a motor with just 12V then it was not a stepper motor, it was a DC servo. The drive is usually a DC Servo, and the head is normally controlled by a stepper motor. Stepper motors are simpler for exact control as they need no feedback, but you do need a drive that takes in a direction and step signal and then it drives the coils on the motor to make it rotate.
Simon Wakley

 

all direct drive floppy spindle motors are brushless dc servos (hall sensors and electronic switching) in a pll closed loop. This method is over a decade old in 3.5" floppy drives. I haven't seen anything else since the old days of 8" floppies and the first 5" drives which were belt driven.

Matt Tudor, MSEE
http://www.gigahertzelectronics.com

 

Try "http://www.nutsvolts.com/":http://www.nutsvolts.com/ -- the website for NUTS AND VOLTS
magazine. There are a lot of hobbyists on their BBS's.

 

SGS Thompson and Alegro Systems both have excelent App notes on driving stepper motors and also have IC's designed to drive them. Check out SGS Thompson's AN235 Stepper Motor Driving and AN 460 Common problems and solutions. The floppy drive stepper was originally driven from 12V and are usually Unipolar drive w/5 or 6 leads. Refer to Figure 2 in AN235.
"http://us.st.com/stonline/books/toc/an/41.htm":http://us.st.com/stonline/books/toc/an/41.htm