2 Dec
2015
2 Dec
'15
11:51 a.m.
Date: Wed, 2 Dec 2015 12:40:08 +0000
From: Rod Smallwood <rodsmallwood52 at btinternet.com>
To: "General Discussion: On-Topic and Off-Topic Posts"
<cctalk at classiccmp.org>
Subject: TU-58
Message-ID: <565EE6A8.2030004 at btinternet.com>
Content-Type: text/plain; charset=utf-8; format=flowed
Dear List
While the silk screeners process the panels I have a
couple of days for a little project
I have a TU-58 and yes it had gooey drive wheels.
Now it no longer has that problem but I have black and gooey fingers.!!!
I know this issue has been addressed before.
So I think somebody must know where I can get the right tubing to
replace the degraded stuff.
The drive hub is 0.42" and the rubber bit was 0.62" o/d
A UK source would be nice,
Rod
I'm also intessted in this. I have a dual TU-58 that belongs to my VAX
11/730 that need new capstan rubber. European source...
/Anders
2 Dec
2 Dec
12:04 p.m.
Anders,
I can fix them, if you look at my Flickr page you can see some examples of new capstans I
made.about halfway the site.
www.flickr.com/hp-fix
And of the HP3000 ;)
-Rik
-----Oorspronkelijk bericht-----
Van: "Anders Sandahl" <anders at abc80.net>
Verzonden: ?2-?12-?2015 20:51
Aan: "cctech at classiccmp.org" <cctech at classiccmp.org>
Onderwerp: Re: TU-58
Date: Wed, 2 Dec 2015 12:40:08 +0000
From: Rod Smallwood <rodsmallwood52 at btinternet.com>
To: "General Discussion: On-Topic and Off-Topic Posts"
<cctalk at classiccmp.org>
Subject: TU-58
Message-ID: <565EE6A8.2030004 at btinternet.com>
Content-Type: text/plain; charset=utf-8; format=flowed
Dear List
While the silk screeners process the panels I have a
couple of days for a little project
I have a TU-58 and yes it had gooey drive wheels.
Now it no longer has that problem but I have black and gooey fingers.!!!
I know this issue has been addressed before.
So I think somebody must know where I can get the right tubing to
replace the degraded stuff.
The drive hub is 0.42" and the rubber bit was 0.62" o/d
A UK source would be nice,
Rod
I'm also intessted in this. I have a dual TU-58 that belongs to my VAX
11/730 that need new capstan rubber. European source...
/Anders
1:05 p.m.
I'm also intessted in this. I have a dual TU-58
that belongs to my VAX
11/730 that need new capstan rubber. European source...
/Anders
This is the picture..
https://www.flickr.com/photos/hp-fix/9452805294/in/album-72157634959418702/
I'm using a special kind of hose, which is precisely made.
-Rik
1:28 p.m.
This is the picture..
https://www.flickr.com/photos/hp-fix/9452805294/in/album-72157634959418702/
I'm using a special kind of hose, which is precisely made.
OK, what is it called, who makes it, and where can you buy it?
-tony
1:51 p.m.
-----Oorspronkelijk bericht-----
Van: cctech [mailto:cctech-bounces at classiccmp.org] Namens tony duell
Verzonden: woensdag 2 december 2015 22:29
Aan: General Discussion: On-Topic Posts
Onderwerp: RE: TU-58
It's not the first time this discussion comes around..
Poly Urethane rubber, it's called in dutch 'precisie buis/slang' and you can
get it in several sizes from 6mm to . large
http://www.deboerit.nl/ is my supplier it's a local firm.
-Rik
This is the picture..
https://www.flickr.com/photos/hp-fix/9452805294/in/album-7215763495941
8702/ I'm using a special kind of hose, which is precisely made.
OK, what is it called, who makes it, and where can you buy it?
-tony
= 
2:20 p.m.
Hi
Well it certainly works for you Rik.
I dont speak Dutch and its not clear exactly which of the products you
refer to.
The end of hub appears to have been turned on a lathe.
So if you speak Dutch and have a nice big lathe in your shed you can fix
your TU58
For us lesser mortals the search goes on.
Rod
On 02/12/2015 21:51, Rik Bos wrote:
-----Oorspronkelijk bericht-----
Van: cctech [mailto:cctech-bounces at classiccmp.org] Namens tony duell
Verzonden: woensdag 2 december 2015 22:29
Aan: General Discussion: On-Topic Posts
Onderwerp: RE: TU-58
It's not the first time this discussion comes around..
Poly Urethane rubber, it's called in dutch 'precisie buis/slang' and you can
get it in several sizes from 6mm to . large
http://www.deboerit.nl/ is my supplier it's a local firm.
-Rik
This is the picture..
https://www.flickr.com/photos/hp-fix/9452805294/in/album-7215763495941
8702/ I'm using a special kind of hose, which is precisely made.
OK, what is
it called, who makes it, and where can you buy it?
-tony
=
3 Dec
3 Dec
2:02 a.m.
-----Oorspronkelijk bericht-----
Van: cctalk [mailto:cctalk-bounces at classiccmp.org] Namens Rod Smallwood
Verzonden: woensdag 2 december 2015 23:20
Aan: General Discussion: On-Topic and Off-Topic Posts
Onderwerp: Re: TU-58
Hi
Well it certainly works for you Rik.
I dont speak Dutch and its not clear exactly which of the products you
refer to.
The end of hub appears to have been turned on a
lathe.
So if you speak Dutch and have a nice big lathe in your shed you can fix
your
TU58 For us lesser mortals the search goes on.
Rod
Rod,
I don't use the lathe but I use a small dc motor in my vice , most of the
time the motor from the drive.
I use a "Eze-Lap Fine Diamond Pocket Stone 1" x6" (600)" to make them
to the
right size.
Some times when I have to remove more material I start with Scotch Wet and
Dry 150 sanding paper wrapped around the Eze-Lap.
It's all about craftsmanship and a steady hand if you keep the motor running
at a steady speed about 50% of its nominal voltage everybody should be able
to do this.
After gluing the rubber to the capstan it takes me about 20-40 minutes to
get the rubber to the right size.
So you lesser mortals should be able to do this too.
For the tubing use something with the right inner size (a little smaller
than the hub) the outer size should be a little larger.
And look for an industrial hose/rubber supplier both PU and Neoprene should
work.
-Rik
3:57 a.m.
Thanks ..
That helps.
1. The hub measures about 11mm so I should be able to get a 10mm
bore hose on (warm it up a bit might help) .
2. What type of glue is best?
3. You can see how thick the old one was but yours seems a little
bigger?
4. From what I have seen on the list the actual outer diameter is
0.625 inches.
I calculate that as 15.9 mm
Thanks ...
Rod Smallwood
On 03/12/2015 10:02, Rik Bos wrote:
-----Oorspronkelijk bericht-----
Van: cctalk [mailto:cctalk-bounces at classiccmp.org] Namens Rod Smallwood
Verzonden: woensdag 2 december 2015 23:20
Aan: General Discussion: On-Topic and Off-Topic Posts
Onderwerp: Re: TU-58
Hi
Well it certainly works for you Rik.
I dont speak Dutch and its not clear exactly which of the products you
refer to.
The end of hub appears to have been turned on a
lathe.
So if you speak Dutch and have a nice big lathe in your shed you can fix
your
TU58 For us lesser mortals the search goes on.
Rod
Rod,
I don't use the lathe but I use a small dc motor in my vice , most of the
time the motor from the drive.
I use a "Eze-Lap Fine Diamond Pocket Stone 1" x6" (600)" to make them
to the
right size.
Some times when I have to remove more material I start with Scotch Wet and
Dry 150 sanding paper wrapped around the Eze-Lap.
It's all about craftsmanship and a steady hand if you keep the motor running
at a steady speed about 50% of its nominal voltage everybody should be able
to do this.
After gluing the rubber to the capstan it takes me about 20-40 minutes to
get the rubber to the right size.
So you lesser mortals should be able to do this too.
For the tubing use something with the right inner size (a little smaller
than the hub) the outer size should be a little larger.
And look for an industrial hose/rubber supplier both PU and Neoprene should
work.
-Rik
6:25 a.m.
Thanks ..
That helps.
1. The hub measures about 11mm so I should be able to get a 10mm
bore hose on (warm it up a bit might help) .
Yep.
2. What type of glue is best?
I use 2k but in
the past I used PU-glue, both works fine.
3. You can see how thick the old one was but yours
seems a little
bigger?
It's important the tape cassette presses both switches but doesn't reach the
bulkhead (right name?).
The tape cassette is spring loaded and needs a little room to move (<1mm).
Put an tape without cover (just the ground plate) in the drive and you can
measure the distance between the drive wheel and the capstan ad a little
(about 1mm or less) and got the thickness of the rubber.
There is enough tolerance in the electronics, so you have room to
experiment.
4. From what I have seen on the list the actual
outer diameter is
0.625 inches.
I calculate that as 15.9 mm, looks good to me.
-Rik
9:32 a.m.
Hi
Well it certainly works for you Rik.
I dont speak Dutch and its not clear exactly which of the products you
refer to.
The end of hub appears to have been turned on a lathe.
So if you speak Dutch and have a nice big lathe in your shed you can fix
your TU58
Surely you don't need a big lathe. A small lathe, a Unimat,
a Taig/Peatol, etc would be easily big enough to make hubs for the TU58.
I hate to say it, but IMHO if you are restoring a classic computer which needs
significant mechanical work (drive rollers, pulleys, spacers, tapped bushes, etc)
then access to an engineer's lathe (and the ability to use it) is almost essential.
-tony
5:47 p.m.
Hi Tony
Thats interesting I had thought about a model makers lathe.
I have a pillar drill and the usual set of tools.
I did start out as a mechanical engineer and my
top subjects at school were metalwork and technical drawing.
My metalwork master put me in for those subjects in GCE a
year early ie 15 instead of 16.
I duly passed and come September and the first metalwork
class and I'm already to go.
The teacher pounces on me an asks me where the hell do I think I'm going.
You passed didn't you? Yes says I. So I got excused school one
afternoon a week.
Shucks.. My favorite lessons and I couldn't go!!!
I only changed to electronics for reasons beyond my control.
It looks like a visit to Machine Mart may be coming up.
On 03/12/15 17:32, tony duell wrote:
Hi
Well it certainly works for you Rik.
I dont speak Dutch and its not clear exactly which of the products you
refer to.
The end of hub appears to have been turned on a lathe.
So if you speak Dutch and have a nice big lathe in your shed you can fix
your TU58
Surely you don't need a big lathe. A small lathe, a Unimat,
a Taig/Peatol, etc would be easily big enough to make hubs for the TU58.
I hate to say it, but IMHO if you are restoring a classic computer which needs
significant mechanical work (drive rollers, pulleys, spacers, tapped bushes, etc)
then access to an engineer's lathe (and the ability to use it) is almost essential.
-tony
4 Dec
4 Dec
12:11 p.m.
Hi Tony
Thats interesting I had thought about a model makers lathe.
I have a pillar drill and the usual set of tools.
I am darn glad I asked for a lathe instead of a car (and driving lessons) when
my late father offered to buy me the latter. I still can't drive, but I don't
miss
that at all...
I did start out as a mechanical engineer and my
top subjects at school were metalwork and technical drawing.
Unfortuantely I went to the sort of school that inflicted Latin and
(ancient) Greek on its students. Metalwork was certainly a no-no, even
physics was frowned upon... But amazingly I managed to get 'electronics'
classed as a sport, so while others chased spheres and prolate spheroids,
I hand-wired a Z80-based computer, made a simple CRT from scratch and
taught myself how to use a lathe....
It looks like a visit to Machine Mart may be coming
up.
Hmmm.. the tools they sell have various perjorative names that I
will not repeat publically.... The general balanced view is that they
can be used for good work, but you need to sort them out first, which
may mean access to another lathe and/or metalwork skills (sounds like
you have the latter). Personally I would consider a second-hand
Myford 7 (if you have the space) or Unimat (one of the old metal
ones, of course) if you don't.
-tony
2:58 p.m.
Hi
My late uncle had a Myford in a shed at my Grandmothers house in
Norfolk.
By the time I was tall enough to use it he had moved it to his house
down the road
TU58 's is ready to test. I tried it in a spare serial port on a VS 3100.
Result nothing. I suspect the port is 423 and the tu58 232.
Regards
Rod
On 04/12/15 20:11, tony duell wrote:
Hi Tony
Thats interesting I had thought about a model makers lathe.
I have a pillar drill and the usual set of tools.
I am darn glad I asked for a
lathe instead of a car (and driving lessons) when
my late father offered to buy me the latter. I still can't drive, but I don't
miss
that at all...
I did start out as a mechanical engineer and my
top subjects at school were metalwork and technical drawing.
Unfortuantely I went
to the sort of school that inflicted Latin and
(ancient) Greek on its students. Metalwork was certainly a no-no, even
physics was frowned upon... But amazingly I managed to get 'electronics'
classed as a sport, so while others chased spheres and prolate spheroids,
I hand-wired a Z80-based computer, made a simple CRT from scratch and
taught myself how to use a lathe....
It looks like a visit to Machine Mart may be
coming up.
Hmmm.. the tools they sell have various perjorative names that I
will not repeat publically.... The general balanced view is that they
can be used for good work, but you need to sort them out first, which
may mean access to another lathe and/or metalwork skills (sounds like
you have the latter). Personally I would consider a second-hand
Myford 7 (if you have the space) or Unimat (one of the old metal
ones, of course) if you don't.
-tony
5 Dec
5 Dec
4:29 a.m.
TU58 's is ready to test. I tried it in a spare serial port on a VS 3100.
Result nothing. I suspect the port is 423 and the tu58 232.
Actually the TU58 serial port has the differential driver and receivers used
on the later serial ports. It should talk to DECs version of RS423 with no
problems at all.
What sofrware are you using to drive it?
-tony
7:54 a.m.
Hi
At the moment I have it connected to an old laptop running msdos
and gizmos driver for same.
Its showing signs of life at 38400. I have BOB in circuit and can see
the commands going to it.
Some times it responds and sometimes it does not.
Rod
On 05/12/15 12:29, tony duell wrote:
TU58 's is
ready to test. I tried it in a spare serial port on a VS 3100.
Result nothing. I suspect the port is 423 and the tu58 232.
Actually the TU58
serial port has the differential driver and receivers used
on the later serial ports. It should talk to DECs version of RS423 with no
problems at all.
What sofrware are you using to drive it?
-tony 
8:15 a.m.
On 2015-12-05 13:29, tony duell wrote:
Not only that, but you can normally go between 232 and 423 with no
problem. I suspect there is something else wrong with the port, or the
software...
Johnny
--
Johnny Billquist || "I'm on a bus
|| on a psychedelic trip
email: bqt at softjar.se || Reading murder books
pdp is alive! || tryin' to stay hip" - B. Idol
TU58 's is ready to test. I tried it in a spare serial port on a VS 3100.
Result nothing. I suspect the port is 423 and the tu58 232.
Actually the TU58 serial port has the differential driver and receivers used
on the later serial ports. It should talk to DECs version of RS423 with no
problems at all.
8:17 a.m.
TU58 's is ready to test. I tried it in a
spare serial port on a VS 3100.
Result nothing. I suspect the port is 423 and the tu58 232.
Actually the TU58 serial port has the differential driver and receivers used
on the later serial ports. It should talk to DECs version of RS423 with no
problems at all.
8:26 a.m.
And we have a runner.. it was set for 19.2k
A quick change of config.sys and off we go.
I have only one cartridge so no tape to tape
Pc to tape works. So now to find one of my systems with a spare serial port
R
On 05/12/15 16:15, Johnny Billquist wrote:
On 2015-12-05 13:29, tony duell wrote:
Not only that, but you can normally go between 232 and 423 with no
problem. I suspect there is something else wrong with the port, or the
software...
Johnny
TU58 's is ready to test. I tried it in a spare serial port on a VS
3100.
Result nothing. I suspect the port is 423 and the tu58 232.
Actually the TU58 serial port has the differential driver and
receivers used
on the later serial ports. It should talk to DECs version of RS423
with no
problems at all. 
2 Dec
2 Dec
2:23 p.m.
On 12/02/2015 01:51 PM, Rik Bos wrote:
It's not the first time this discussion comes
around.. Poly Urethane
rubber, it's called in dutch 'precisie buis/slang' and you can get it
in several sizes from 6mm to . large http://www.deboerit.nl/ is my
supplier it's a local firm.
That's curious--when this popped into my inbox, I was in the middle of
asking if anyone used PU hose for this purpose. I'll add a caution that
PU comes in many durometer ratings and that I don't know what's
appropriate for this use.
But yeah, the stuff is very common. I'd be surprised if McMaster-Carr
didn't sell it.
--Chuck
3 Dec
3 Dec
2:06 a.m.
-----Oorspronkelijk bericht-----
Van: cctalk [mailto:cctalk-bounces at classiccmp.org] Namens Chuck Guzis
Verzonden: woensdag 2 december 2015 23:24
Aan: General Discussion: On-Topic Posts
Onderwerp: Re: TU-58
On 12/02/2015 01:51 PM, Rik Bos wrote:
asking
if
It's not the first time this discussion comes
around.. Poly Urethane
rubber, it's called in dutch 'precisie buis/slang' and you can get it
in several sizes from 6mm to . large http://www.deboerit.nl/ is my
supplier it's a local firm.
That's curious--when this popped into my inbox, I was in the middle of anyone used PU hose for this purpose. I'll add a
caution that PU comes in
many
durometer ratings and that I don't know what's
appropriate for this use.
But yeah, the stuff is very common. I'd be surprised if McMaster-Carr
didn't sell
it.
--Chuck
It shouldn't be too soft, soft rollers have too much friction.
But normal hose grade PU should perform ok.
-Rik
3086
days inactive
3089
days old
19 comments
6 participants
participants (6)
-
anders＠abc80.net -
ard＠p850ug1.demon.co.uk -
bqt＠update.uu.se -
cclist＠sydex.com -
hp-fix＠xs4all.nl -
rodsmallwood52＠btinternet.com