>Probably not a lot of help, but if that interface is the same physically
>as the DA15 connector on other Philips/LMS CD-ROMs, I have the service
>manual for the CDD462. It's little more than a schematic and an
>incomplete parts list (the CDD462 is based on an audio CD-player, and
>you're expected to have the service manual for that!), but it would
>contain the interface pinout. Let me know if you want me to dig it out.
Maybe - I don't suppose it describes any DIP switches on the back of the
drive? The actual drive in the RRD40 is a Laser Magnetics CM 201, so it's
unlikely that they'd be the same, but you never know.
I ask because I happened to find this article
http://h71000.www7.hp.com/wizard/wiz_3914.html
The wizard describes the RRD40-DC as a "slave drive" for use with an
existing KRQ50/RRD40 pair.
Question - what's the difference between a RRD40-DC and the RRD40-HC? Is
there a switch or jumper in the drive that makes it a "slave"?
Ah, if only I had a manual :-)
Bob
>>If you wanted to convert from WPS-8 to WordPerfect, then I
>>could offer my code at http://srv.net/~kth .
>
FYI: I got connection refused just now when trying to access your
site.
I modified your software to convert 8" WPS floppies dumped with my
dump/restore programs and should still work with 5 1/4 dumped with
putr.
The conversion to word actually worked the best. It really converts
to wordperfect but when going through the word converter it uses some
later version codes to do better formatting.
ftp://ftp.pdp8.net/software/wps/ftp://ftp.pdp8.net/software/dumprest/
Item #270070599391 on ebay
I've bought from this guy before and always been satisfied. He even
went out of his way to replace some items for me that were damaged
during shipment.
--
"The Direct3D Graphics Pipeline" -- DirectX 9 draft available for download
<http://www.xmission.com/~legalize/book/download/index.html>
Legalize Adulthood! <http://blogs.xmission.com/legalize/>
> About 1/4 into the tape something started vibrating, quickly
> escalating and before I could do anything, the tape stopped. Result:
> rubber goo on the plastic roller that drives the DC-600 cartridge
> drive belt, some on the tape itself, and the tape shows deformation
> (wavy) on the top half. I had to toss it.
This is the classic failure mode for the rollers. Pressure/Temperature
causing breakdown of the rubber.
> Any idea what could have caused this and how to prevent it?
There is no way to prevent it. The rubber had already decomposed, and
the elevated temperature caused what was left of the bonds to change
state.
> The other option is to remove the melted rubber roller and
> steal the one from the Archive drive.
They aren't interchangeable. The only option you have is to find a newer
drive with a roller that hasn't decomposed (yet..). I know of no
commercial source for just the rollers for either Archive or Wangtek.
Wangtek changed their roller design on later drives. Archive didn't, so
you may be able to find 150meg drives that are new enough to survive.
The most common source are Sun external 150meg shoeboxes, which have
been readily available in the past.
Around Mon, 18 Dec 2006 23:21:23 +0000 (GMT),
> ard at p850ug1.demon.co.uk (Tony Duell) wrote:
>> The drive itself: the rubber roller driving the aforementioned
>> plastic
>> roller had melted. Clearly visible is the area where the rubber meets
>
> [...]
> Baiscailly you have to replace the roller. Replacements that have been
> successfully used (depending on the machine, etc) include silcone
> rubber
> O-rings (possibly with a grobe machined in the original hub, or a
> new hub
> made), heatshrink sleeving, silicoe rubber tubing (fuel line for
> glow-plug engines, for example), etc.
>
> I've wondered if the 2-pack elastomer materials sold by e.g. Devcon
> would
> work. Make up a mould and cast a new roller. A lot of work, but if it
> does the job well it'd be worth it in some cases.
I've had extremely good luck using Plasti Dip <http://
www.plastidip.com/industrial/plastidip.html> to repair capstans. The
product lays up in layers of 2-8 mils (depending on dilution) and
produces an extremely uniform coating. I have repaired several HP
tape decks out of 30 year old test equipment which required a layer
of 70 mils. The worst runout was less than 1/2 mil. The material
appear to be sufficiently durable for the task. The only drawback is
the requirement for patience - each layer requires 30 min. minimum
drying time. After a bit of experimentation I found that floating a
bit of solvent on the surface maintained the coating consistency from
dip to dip.
>> For those of us with machine tools, I wonder if a roller can be "fine
>> tuned" to the proper diameter by fitting an oversize piece of
>> neoprene tubing to the roller, cooling the whole affair in dry ice,
>> then machining it (on a lathe) to the proper size. I can't recall
>>
>
> I believe it can, although cooling to liquid nitrogen temperatures is
> recomend (if only beacuase it takes longer to warm up again, so you
> have
> longer to take a cut).
>
> I've also heard you _can_ machine 'rubbers' at room temperature,
> but that
> the tools are totally different from those used for metal turning.
> May be
> worth investigarting.
>
> I've not tried either though.
>
> -tony
Cooling to LN2 temperatures has its drawbacks: the rubber either
separates from the mandrel or it shatters - or both... The rubber
becomes glass-like and you cannot use cutting tools to machine. A
number of years back back in grad school I attempted to repair a
roller for a Van de Graaff generator using LN2 and failed miserably.
An old machinist got his chuckles watching my many tries. He took a
CO2 fire extinquisher to cool the roller and used a grinder mounted
on the lathe to surface the beast. You have to warm the object up
every so often to find out what the dimensions really are.
I've since surfaced a laser printer's pickup roller using a Dremel
grinder mounted on my mini-lathe at room temperature with good
results (didn't help one bit in the printer - those rollers are not
just rough, but have a directional nap).
CRC
Check out:
http://cgi.ebay.com/70-22786-01_W0QQitemZ230064962734QQihZ013QQcategoryZ582…
I 'asked' a question on where he gets that kind of price, and that when
he comes down
off his drug induced high I might be interested....
This has to be the most unbelievable case of 'seller things he has
platinum' that I've
ever seen !
If anyone has one of these... I'd like to get one for my PDP-11/83.
Since mine
came with an expansion box, the panel I have is the height of the two
units and is
meant for mounting in a DEC rack... so finding one or two of the ones
like in the
auction link above would be ideal.
Thanks,
-- Curt
On 18 Dec 2006 at 0:14, Curt @ Atari Museum wrote:
> Anyone had success importing Vax WPS files into a modern
> wordprocessor? I had heard that older Wordperfect's could read in Vax
> WPS files, anyone know for a fact?
Are you talking about WPS I files a la DECStation?
Cheers,
Chuck
