Re: How much of a ][ is needed to twitch?

["Alex Freed" <alexf@mirrow.com>]

"Tristan Mumford" <xtristan.xmumford@xgmail.xcom> wrote in message 
news:45d27df0$0$52924$c30e37c6@lon-reader.news.telstra.net...
> concern. With the uC running at a decent speed, and the much shorter step
> time of the 3-1/2" drives it looks to be quite possible to use an
> inexpensive uC to control the head.

You can do just about anything with a uC. And it doesn't matter how tight
the code is as a disk drive is a very slow mechanical device.
>
> My method may. Unless I'm wrong about one aspect of the PC floppy drives. 
> I
> believe that one strobe of /STEP (ie high, low, high) results in a single
> track step. When it's held low it does a half step. Of course I may be
> wrong and it may be a full step, and the strobe does two. It's hard to 
> find
> low level detail on the workings of the drives.

I don't think that is the case. I'm pretty sure that one pulse is one step.
If you want to use all 80 tracks, you can't get half-tracks.

-Alex.