[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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