On Oct 11, 2009, at 3:29 PM, Ruud@baltissen.org wrote: > Hallo Scott, > > >> I've looked high and low for directions on alignment and setting >> the speed on a 1541 II drive but have had no luck. > > It may sound a bit weird but I haven't any idea for the simple > reason I never had alignment or speed problems. And if I have, I > will try Google and comp.sys.cbm first. > some of the drive mechanisms have a little timing disk on the bottom of the flywheel - if yours does not: Pg 33 of SAMs Commodore 1541 Trouble shooting & repair guide Michael Peltier (I have several copies in stock) - there is a little picture fo the wheel that you need - xerox that page cut the wheel out and paste it on the underside of the mech's flywheel use a flourescent light - put a pointer (pen,pencil, screw driver) along side the flywheel and see if the calibrated disk stays steady by the pointer or precesses/postcesses. there is a pot on the motor control board to adjust the speed if the disk is not stay by the pointer. I only know how to do the alignment with the analog calibration floppy diskette and an ocilloscope on the input pins of the video amplifiers (chips on the drive's PCB) (got this from a different manual including a basic listing for stepping the head in/out while spinning the diskette.) --Ray --------------------------------------------------------------- |Raymond C. Bryan 651-642-9890 vox | The battle is sometimes | |Raymond Computer 651-642-9891 fax | to the small for | |2402 University Ave -email: raycomp | the bigger they are | |St Paul MN 55114 @visi.com | the harder they fall. | |USA Amiga - Commodore | -- James Thurber -- | http://www.raymondcomputer.com --------------------------------------------------------------- Message was sent through the cbm-hackers mailing listReceived on 2009-10-11 23:00:04
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