Jones on Stepping Motors:

http://www.cs.uiowa.edu/~jones/step/

is one of the best basic references on steppers anywhere on the web. Plenty
of diagrams like you asked for.

--Lawrence

----- Original Message -----
From: "Graham" <Graham.D@WANADOO.FR>
To: <PICLIST@MITVMA.MIT.EDU>
Sent: Thursday, December 28, 2000 7:06 AM
Subject: [EE]: stepper connections


> I have been stripping old steppers out of disk drives...old ones, straight
> forward to find what is going on with 5/6 wires
>
> recently I got started on some newer 3.5 inch types..
>
> these have some *very* small head steppers, unmarked, that look good for
> making a miniature desktop mobile platform...these motors have only 4
> connections, the PCB connector is marked A, bar A, B, bar B
>
> a quick 2 minute test shows: A+_A gives a step one way, B+_B a step the
> other, then reversing polarity does the opposite in each case, so looks
like
> these need alternate step+alternate polarity......
>
> before I go to greater lengths am I correct or wrong ???
>
> if wrong, anyone know what the correct control procedure is
> if right, anyone written up, or found on the web, the various stepping
> sequencies to save me re-doing it.
>
> A pointer/link to a full spec document on 4 wire (polarity reversal ?)
> steppers of this nature would be perfect....they are driven directly from
a
> Sony controller so looks like perhaps very low current ?.....
>
> Graham
>
>
>
>
> -Need *high IP3* AND good N/F ?? try this- http://www.rfham.com
>
> --
> http://www.piclist.com hint: PICList Posts must start with ONE topic:
> [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads
>
>

--
http://www.piclist.com hint: PICList Posts must start with ONE topic:
[PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads