[Coco] Coco3 System problem

[john T Chasteen]

Thanks Gene

I am printing this e-mail and try what you suggest.

I think my neighbor has a strobe light.
What are there Specification on RPM ?
I thought I will try this next week.
I am trying to keep my coco working .
As soon as things get back to normal I want to
get DRIVEWIRE3 operating and learn how to use the system.

John
 
On Sat, 27 Aug 2011 17:25:05 -0400 gene heskett <gheskett at wdtv.com>
writes:
> On Saturday, August 27, 2011 05:07:28 PM john T Chasteen did opine:
> 
> > I finally had to take the 5.25 inch floppy drives out of their 
> case.
> > Drive
> > Zero finally refused to read disk or format disk. I changed he 
> option
> > clips
> > on drive one and optioned it to be drive zero. The failed floppy 
> unit
> > will
> > still spin and the select light comes on but I cant format or 
> read
> > diskettes.
> > Any suggestions will be appreciated in trying to "Fix" this floppy 
> drive
> > problem.
> > I did use a "Cleaning Diskette"  to see if that would help.
> > I am sure I can replace the floppy with one that is still good.
> > Any suggestions will be appreciated.
> > 
> > John
> > 
> The amount of power for moving the head is miniscule in most 
> floppies, and 
> precisely moving the head depends on the lubrication and cleanliness 
> of the 
> rails or rods the head carriage slides on.  And in those drives that 
> use a 
> small stepper direct driving a long screw with spiral threads, and 
> usually 
> a small piece of piano wire riding in that spiral, the spiral needs 
> to have 
> all that 25 year old hardened grease cleaned out of its grooves and 
> 
> replaced with fresh grease.  I have used a dollop of std grease gun 
> grease 
> on several occasions, and had even had to remove the wire and turn 
> it when 
> it can be felt that there is wear enough that the 'threads are 
> sloppy'.  
> There is, on that type of drive mechanism, a bronze spring that 
> rides the 
> far side of the 'screw', and in the case of the amiga drives, has 
> worn so 
> badly that it wore plumb thru and then dug into the screw preventing 
> the 
> motor from backing up!
> 
> You will need a fresh box of q-tips, and/or an acid brush, and a can 
> of 
> acetone (obviously no smoking when the can is open) to clean out 
> that old 
> caked in grease.  Use the acid brush to poke at it and break it up, 
> the the 
> q-tip to remove it.  Do NOT put the dirty q-tip back in the acetone 
> can, 
> but grab a fresh one every time, they are cheaper by far than the 
> acetone.
> 
> If that doesn't do it, along with a swipe or 4 across the heads face 
> with 
> the acetone to clean it, then something else has gone aglay.
> 
> Don't forget that one and only one floppy drive, the one on the far 
> end of 
> the cable, needs the terminator resistors installed.  Something I 
> have been 
> known to forget when I am shuffling drives around.  :)
> 
> Cheers, gene
> -- 
> "There are four boxes to be used in defense of liberty:
>  soap, ballot, jury, and ammo. Please use in that order."
> -Ed Howdershelt (Author)
> My web page: <http://204.111.67.138:85/gene>
> You are magnetic in your bearing.
> 
> --
> Coco mailing list
> Coco at maltedmedia.com
> http://five.pairlist.net/mailman/listinfo/coco
> 
> 
 
 
"Life is like riding A bicycle. To keep your balance you must keep
moving"
Albert Einstein
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