6 Nov
2013
6 Nov
'13
1:41 p.m.
-----Oorspronkelijk bericht-----
Van: cctalk-bounces at classiccmp.org [mailto:cctalk-bounces at classiccmp.org]
Namens Chris Elmquist
Verzonden: woensdag 6 november 2013 18:54
Aan: cctalk at classiccmp.org
Onderwerp: Re: TU58 capstan solutions anyone ?
On Wednesday (11/06/2013 at 10:21AM -0500), Ethan Dicks wrote:
>
> > Anyone done a T58 here ? Can you let me know what materials I need
> > and process to replace "goo precursor" with tubing/etc ?
> >
> > I don't have a lathe, machine tools, etc available to me (beyond
> > files, a dremel, etc).
>
> http://www.classiccmp.org/pipermail/cctech/2007-August/044802.html
>
> I just used ordinary Tygon tubing, 1/2" ID, ISTR. You clean off the
> old rubber from the brass bit in the middle, cut a slice of tubing about
1/4"
thick, then
fit it over the brass and trim any rough edges with an
X-Acto knife so nothing snags the tape. I might have put a drop of
superglue at the Tygon-brass junction to keep it from wandering.
I have also restored two TU-58 drives recently following pretty much recipe. It was difficult to trim the tubing cleanly
so I also "polished"
it with a
Dremel and sanding bit.
My problem is now the tapes. The rubber belt in the tapes also ages
and as soon as you spin up a tape in your newly repaired drive, that belt
will
break.
I've successfully rebuilt maybe (5) tapes from several dozen by stealing
what
appear to be good belts from crappy looking tapes but
even after complete
disassembly, transfer of the belt and reassembly, my luck has been that
that belt
will now break.
There is also an issue with some kind of lubricant in certain tapes that
has
turned
to sticky goo rather than a lubricant. On these
tapes, the tape bobbins
hang up
on their spindles, which puts further load on the belt
and causes it to
break... or
if it doesn't break, causes a drive fault because
the tape isn't moving
like it
should. Some of these I've recovered by cleaning
the lubricant from the
spindles
and everywhere else I can find it inside the cartridge
and then replacing
it with
tiny amounts of a teflon lubricant.
But, too much work, IMO.
I restored the drive for h{istor,yster}ical reasons but I can't see ever
really
using
it again unless somebody starts making new tapes :-)
Chris
--
Chris Elmquist
Chris,
I rebuilded HP-85 tape drives and converted them too QIC40/80 drives.
QIC40 tape are younger and seems to be more durable then the DC100A.
Some QIC40 tapes uses small rubber bands which you can use to fix DC100A
tapes.
DC100A has the same size as the DEC tapes, the only point is the DEC tapes
are formatted.
But if the format is know someone should be able to kludge some electronics
together to format the tapes.
-Rik