17 Aug
1999
17 Aug
'99
3:01 p.m.
What's the best way to replace a broken belt in a DC300 tape cartridge? Is there a
source for new belts?
17 Aug
17 Aug
3:42 p.m.
Upon the date 05:01 PM 8/17/99 -0700, Wayne Smith said something like:
What's the best way to replace a broken belt in a
DC300 tape cartridge? Is
there a source for new belts?
Not likely unless there was a real unusual need and someone already
supplies them. Normally, the mfr (3M, Dysan, or whoever else made them)
figures the user will typically throw out a defective cart and use a new
one. Hence, the assumption there's likely no aftermarket supplier,
especially now since DC300's have been out of popularity for several years.
Best way to deal with this is to find an unusable tape with a good belt and
very carefully remove it and very carefully replace it on your defective
one. Probably should find one of the same manufacturer just to be safe.
It's stretched rather taught and will be a real circus to replace. Got
three or four arms hanging off you? :) Tony, have any thoughts on this?
Do I assume correctly you have an only copy of a very important OS tape or
something just as critical you're unfortunately trying to repair?
Good luck.
Regards, Chris
-- --
Christian Fandt, Electronic/Electrical Historian
Jamestown, NY USA cfandt(a)netsync.net
Member of Antique Wireless Association
URL: http://www.antiquewireless.org/
4:01 p.m.
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4:34 p.m.
Upon the date 02:01 AM 8/18/99 +0100, Tony Duell said something like:
-- snip decent description of how to test oneself patience --
>
> Upon the date 05:01 PM 8/17/99 -0700, Wayne Smith said something like:
> >What's the best way to replace a broken belt in a DC300 tape cartridge?
Is
> >there a source for new belts?
--
snip --
three or four
arms hanging off you? :) Tony, have any thoughts on this?
Argh! (that's me remembering what happens when you try to do this).
The belt runs from the 'drive puck' (the roller that's driven by the
capstan in the drive), between the 2 tape spools (it rubs on the outer Put the cover one, and fit the screws.
Wind on the tape a few more turns, and try it in the drive. Start by
'retensioning' the tape.
Good. I'm glad you took on the procedure. I was concerned I would use *far*
too many cuss words. I tried this with one or two DC100's years ago and a
DC600 and a Travan 1 cart fairly recently. Was *not* a pretty sight each
time. I tossed the TR-1 cart anyway since the belt had friction damage. It
only had a couple of backup procedures run on it and was fairly new when it
self-destructed :(
Regards, Chris
-- --
Christian Fandt, Electronic/Electrical Historian
Jamestown, NY USA cfandt(a)netsync.net
Member of Antique Wireless Association
URL: http://www.antiquewireless.org/
18 Aug
18 Aug
8:46 a.m.
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17 Aug
17 Aug
5:04 p.m.
ard(a)p850ug1.demon.co.uk (Tony Duell) wrote:
Evertything will fly off (:-(). Try again, and after about 5 goes you'll
get it in place.
Hi
I remember trying to do this and it took several hours.
It was a 3M tape as I recall but it did have data the
needed to be saved. I don't recall how I did it but
I did get it repaired.
Dwight
1:32 p.m.
Date: Tue, 17 Aug 1999 19:04:22 -0700 (PDT)
Reply-to: classiccmp(a)u.washington.edu
From: Dwight Elvey <elvey(a)hal.com>
To: "Discussion re-collecting of classic computers"
<classiccmp(a)u.washington.edu>
Subject: Re[2]: DC300 Tape Repair
ard(a)p850ug1.demon.co.uk (Tony Duell) wrote:
Hi
I remember trying to do this and it took several hours.
It was a 3M tape as I recall but it did have data the
needed to be saved. I don't recall how I did it but
I did get it repaired.
Dwight
The trick is to have torsion on the tape itself, it's easier to have
one spool wound and other spool bare of tape. AFTER band is in place
first. The idea is: Put the replacement band around one side with
full tape first and take the idler wheel around the band and PULL and
put it on the post. Spin it around to even the band up in direction
the full tape spool winds up, watch all the idler wheels are down
against the plate while spinning it by hand.
That band have LOT of elasticity! When I popped one off for fun,
amazing how much it snapped back. About 35% of it's original size.
Second job is to respool it, I have done this several times before.
The trick is led the tape around the posts and feed into the take up
spool and tug the tape end gently to put some torsion on the tape
while keeping the drive band still. That takes some work to get it.
Then carefully feed the end of the tape FLAT against the spool barrel
and rotote the drive wheel to get tape wround. You don't want
any space there between barrel and the tape. You can tell by gently
touching the tape there if it moves. Try again till it's not.
At that stage, wind it more till *ALL* optical HOLES are all past and
on the "take up" spool.
DONE and test, back up the data onto another good tape if required
and use it as scrap data.
DO IT with freshly washed hands or worn with surgical gloves, vinyl
better and less allergic than latex. Oils and any dirt have no
business there.
Wizard
7:21 p.m.
At 08:42 PM 8/17/99 -0400, Chris wrote:
Upon the date 05:01 PM 8/17/99 -0700, Wayne Smith said
something like:
FWIW I have a service manual from HP for a machine that uses the same style but smaller
DC-1000 tapes. HP tells how to replace the belts and also says to remove them from
another tape cartridge.
Joe
What's the best way to replace a broken belt
in a DC300 tape cartridge? Is
there a source for new belts?
Not likely unless there was a real unusual need and someone already
supplies them. Normally, the mfr (3M, Dysan, or whoever else made them)
figures the user will typically throw out a defective cart and use a new
one. Hence, the assumption there's likely no aftermarket supplier,
especially now since DC300's have been out of popularity for several years.
18 Aug
18 Aug
8:43 a.m.
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8 comments
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participants (6)
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ard＠p850ug1.demon.co.uk -
cfandt＠netsync.net -
elvey＠hal.com -
jpero＠cgocable.net -
rigdonj＠intellistar.net -
wsmith＠gj.com