On Tuesday, April 16, 2002, at 11:56 , Mark Benson wrote: > On Tuesday, April 16, 2002, at 03:35 PM, the pickle wrote: >> Mebbe, but I think the spindle motors are usually some sort of mutant >> combination of stepper motor and normal motor. I've never been able to >> get >> them to spin with simple DC application but I might have been doing >> something wrong... > > Yes, I think they are. they are flat coil vs. magnet steppers, similar > to those in a VCR. It's virtually impossible to drive them by DC voltage > as you have to engergize each coil in turn. Using pins sticking out of > the plug on one from a dead Rodime I did manage to get 2 rotations out > of it, really older ones just need some kind of timed stepper circuitry > to get the coils going in the right order. The timing circuits have to > be fast and accurate too if your going to get them up to full speed.
Could you not use a counter IC to drive the coils in turn? Eagle -- Vintage Macs is sponsored by <http://lowendmac.com/> and... Small Dog Electronics http://www.smalldog.com | Enter To Win A | -- Canon PowerShot Digital Cameras start at $299 | Free iBook! | Support Low End Mac <http://lowendmac.com/lists/support.html> Vintage Macs list info: <http://lowendmac.com/lists/vintagemacs.shtml> The FAQ: <http://macfaq.org/> Send list messages to: <mailto:[EMAIL PROTECTED]> To unsubscribe, email: <mailto:[EMAIL PROTECTED]> For digest mode, email: <mailto:[EMAIL PROTECTED]> Subscription questions: <mailto:[EMAIL PROTECTED]> Archive: <http://www.mail-archive.com/vintage.macs%40mail.maclaunch.com/> Using a Mac? Free email & more at Applelinks! http://www.applelinks.com
