On 5/1/20 4:19 PM, Chuck Guzis via cctalk wrote:
On 5/1/20 1:59 PM, Curious Marc via cctalk wrote:
Agreed. They sure are pressed in, then riveted in for good measure. You’d have
to drill them out first. Not an easy modification.
Marc
PTFE 2mm ID 3mm OD tubing is a standard size. That
On 5/1/20 1:59 PM, Curious Marc via cctalk wrote:
> Agreed. They sure are pressed in, then riveted in for good measure. You’d
> have to drill them out first. Not an easy modification.
> Marc
PTFE 2mm ID 3mm OD tubing is a standard size. That might fit.
--Chuck
Hugh said
> I've cut Mylar tape with a Glowforge laser. It cuts very nicely but the
> alignment is a major hassle, plus you can only cut ~15" of tape which
> doesn't go very far. Not worth the effort. If you were to build a custom
> linear drive it might work. But also very slow.
That's very
Agreed. They sure are pressed in, then riveted in for good measure. You’d have
to drill them out first. Not an easy modification.
Marc
> On Apr 30, 2020, at 2:18 PM, Al Kossow via cctalk
> wrote:
>
> On 4/29/20 10:01 PM, Curious Marc via cctalk wrote:
>> Or replacing the posts with ones
> On May 1, 2020, at 1:32 PM, Tony Duell via cctalk
> wrote:
>
> On Fri, May 1, 2020 at 6:20 PM Hugh Pyle wrote:
>>
>> Tony, maybe your collection can help me answer a puzzle: which side is
>> "top"? By my reading, for 8-level tape,
>> - ANSI and other US standards have three data bits
On Fri, May 1, 2020 at 6:20 PM Hugh Pyle wrote:
>
> Tony, maybe your collection can help me answer a puzzle: which side is
> "top"? By my reading, for 8-level tape,
> - ANSI and other US standards have three data bits / index / then five data
> bits
> - ECMA has five/index/three... :)
>
Tony, maybe your collection can help me answer a puzzle: which side is
"top"? By my reading, for 8-level tape,
- ANSI and other US standards have three data bits / index / then five data
bits
- ECMA has five/index/three... :)
https://twitter.com/33asr/status/1138758004747177984
On Fri, May 1,
> On May 1, 2020, at 11:31 AM, John Foust via cctalk
> wrote:
>
> Were there any paper tape devices that did not use the sprocket holes
> to move the tape?
A lot of high speed optical readers use capstans and pinch rollers. But they
still need the sprocket holes to be the source of the
I have in my shop a small blue old Lear Sieglar terminal. I does power on,
but it gets a screen full of garbage. It is missing numerous keycaps. There
are several cracks in the case around the keyboard. Asking $200; local
pickup only. Pictures on request.
Cindy Croxton
Electronics Plus
1613
On Fri, May 1, 2020 at 4:48 PM Anders Nelson via cctalk
wrote:
>
> Wow, what a response! Really appreciate the docs and first-hand experience,
> this is super helpful.
I feel very greedy now. Looking arounds I have (not all working, but
all could be got to work, it's things like drive belts I
Wow, what a response! Really appreciate the docs and first-hand experience,
this is super helpful.
I'm also floored by the complexity of that Roytron punch! Looks like it
contains around one hundred separate parts. I'm convinced the punch parts
will have to be precision metal so while that's not
>
> > Be warned that making any paper tape punch is going to be non-trivial.
> > Grinding and hardening the punch pins and making the die block for
> > them to run in is quite a difficult machining task. And that's needed
> > what ever drives them.
>
> True. At least the pins may be something you
On Fri, May 1, 2020 at 4:32 PM John Foust via cctalk
wrote:
> Were there any paper tape devices that did not use the sprocket holes
> to move the tape?
Yes, both punches and readers.
The Facit 4070 (and the N4000) punch uses a capstan and pinch roller
to move the tape. It's driven by a stepper
At 07:18 AM 5/1/2020, Hugh Pyle via cctalk wrote:
>I've cut Mylar tape with a Glowforge laser. It cuts very nicely but the
>alignment is a major hassle, plus you can only cut ~15" of tape which
>doesn't go very far. Not worth the effort. If you were to build a custom
>linear drive it might
> On May 1, 2020, at 3:17 AM, Tony Duell via cctalk
> wrote:
>
> On Fri, May 1, 2020 at 5:02 AM Anders Nelson via cctalk
> wrote:
>>
>> Hi all,
>>
>> I've had a paper tape reader for a while but never had a punch to make new
>> tapes, and the ones i've found are not only very large but
I've cut Mylar tape with a Glowforge laser. It cuts very nicely but the
alignment is a major hassle, plus you can only cut ~15" of tape which
doesn't go very far. Not worth the effort. If you were to build a custom
linear drive it might work. But also very slow.
Here's a picture of a
An option is to use a computer controlled cutter like Cricut or Silhouette to
punch a tape. Github has software, look at PTAP2DXF.
It has a example pix of a tape made with a "2016 model Silhouette CAMEO
vinyl/stencil cutter and a used large yellow business envelope". Interestingly,
the tape is
Back in the HP 2000 days we used to blow holes in miles of Mylar
tape with BURPE teletype brand punchers and also a large TALLY punch...
even if you find one of either missing the electronics the punch mech
and pins are HARD and will cut though anything!
if
On Fri, May 1, 2020 at 5:02 AM Anders Nelson via cctalk
wrote:
>
> Hi all,
>
> I've had a paper tape reader for a while but never had a punch to make new
> tapes, and the ones i've found are not only very large but also very
> expensive. So I'm toying with the idea of making an open-source punch,
On Fri, May 1, 2020 at 2:18 AM Al Kossow via cctalk
wrote:
>
> On 4/30/20 2:55 PM, Josh Dersch wrote:
>
> > It is, I refoamed mine for VCFPNW last year. I can take internal pictures
> > if it'd help anyone out.
> >
> > - Josh
> >
>
> can you dump the firmware? or was that already done for the
Anders said
> I've had a paper tape reader for a while but never had a punch to make new
> tapes, and the ones i've found are not only very large but also very
> expensive. So I'm toying with the idea of making an open-source punch, but
> I can't find any detailed diagrams of how the mechanism
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