[GreenKeys] M28ASR perf question

Sun Feb 27 21:00:36 EST 2022

Eugene,

On my machine switching from 'K' to 'KT' releases the bars. I forget
exactly how this works, but I remember having to twiddle a bit when
reinstalling the reperf to get things to function properly. Things need to
be lined up properly.

Bill
KE3BK

On Sun, Feb 27, 2022 at 5:28 PM W2HX <w2hx at w2hx.com> wrote:

> Ok, check out this video:
>
> https://youtu.be/kUEECov3wZE
>
>
>
> These bars seem to be “stuck.” Any bit that I manually release, will begin
> to work FB. Should the act of switching the K/KT/T switch somehow reset
> these? Is this the function of the “Punch slide reset bail?” In the image
> below, it loks like it could lift the bars to unlock them?
>
>
>
>
>
>
>
> 73 Eugene W2HX
> Subscribe to my Youtube Channel:
> https://www.youtube.com/c/w2hx-channel/videos
>
>
>
> *From:* Nick England <navy.radio at gmail.com>
> *Sent:* Sunday, February 27, 2022 6:33 PM
> *To:* W2HX <w2hx at w2hx.com>
> *Cc:* GreenKeys at mailman.qth.net; jim.w2jc at gmail.com
> *Subject:* Re: [GreenKeys] M28ASR perf question
>
>
>
> The keyboard transmitter contacts are controlled by the keyboard code
> bars. Those contacts provide the serial electrical connection between
> keyboard and printer. There is no mechanical connection for transferring
> characters from keyboard to printer.
>
>
>
> The keyboard code bars are extended to the left to mechanically transfer
> characters from keyboard to perf/reperf. The code bar extensions (“basket”)
> are probably where your problem lies. It may be just a matter of aligning
> the perf/reperf punch slide latches to line up with the keyboard code bar
> extensions.
>
>
>
> The perf/reperf actually cycles faster than the printer so that in T mode
> you can type/perf faster than the printer’s 60wpm. In K and KT mode the
> keyboard runs at the same speed as the printer.
>
>
>
> N.B. A perf has no electrical connection. A reperf has a selector magnet
> input. Lots of 28ASRs have a perf only, so the cam disengages the
> perf/reperf.
>
>
>
> Here’s the dope-
>
> https://www.navy-radio.com/manuals/tty/28asr-kt-switching.pdf
>
>
>
> Cheers
>
> Nick
>
>
>
> On Sun, Feb 27, 2022 at 5:59 PM W2HX <w2hx at w2hx.com> wrote:
>
> >Most likely the transfer bars from the keyboard to the perf ...  best to
> get the adjustment manual and run thru them before anything else.
>
> Question. Are these the same transfer bars used to actuate the printer?
> The printer works fine from the keyboard. So could the problem be how the
> reperf is bolted down to the plate, maybe it was bolted down slightly off
> kilter? Could it be that simple? Again, I'm hoping that because when I type
> and the printer prints the character perfectly from the keyboard, maybe the
> keyboard transfer bars are aligned ok?
>
> > Usually there is a cover over the punch block which guides the confetti
> into a chute going to a chad box, which gets emptied by you when it gets
> full.
> Anyone have some pictures of this? I don't see much room in the cabinet
> for a chad box, but maybe I'm not looking at the right area?
>
> > finding the sticky transfer bars is probably the first thing you ought
> to do ... then you will have a working punch, and if you decide to swap for
> another reperf the keyboard bars will already be set up.
> Ok, so this makes me think you are saying the problem may be with just the
> keyboard transfer bars and not the interface of those bars to the reperf?
> You seem to indicate that putting in another reperf would likely have the
> same problem.
>
> Thanks for all the comments!
>
> 73 Eugene W2HX
> Subscribe to my Youtube Channel:
> https://www.youtube.com/c/w2hx-channel/videos
>
> -----Original Message-----
> From: Jim Cooper <jim.w2jc at gmail.com>
> Sent: Sunday, February 27, 2022 5:24 PM
> To: W2HX <w2hx at w2hx.com>; GreenKeys at mailman.qth.net
> Subject: Re: [GreenKeys] M28ASR perf question
>
> On 27 Feb 2022 at 21:34, W2HX wrote:
>
> >   1.  Are the sticking bits most
> > likely an issue with the perf
> > mechanism or the keyboard levers? If
> > it is the keyboard, then a new
> > perforator wouldn't help fix it
>
> Most likely the transfer bars from the keyboard to the perf ...  best to
> get the adjustment manual and run thru them before anything else.
>
> >   2.  What is involved in swapping a perforator? Hard? Easy?
>
> relatively easy.  Though with the KT bars from the keyboard, you will have
> the same problem with getting them aligned and non-binding.
>
> >   3.  Where do the chads go with a
> > full chad unit? How are the chads
> > emptied? Are there any modifications
> > I would need to my cabinet? Anyone
> > have a video on this?
>
> Usually there is a cover over the punch block which guides the confetti
> into a chute going to a chad box, which gets emptied by you when it gets
> full.
>
> > I guess I could attempt to find the
> > cause of the sticking bits, but if I
> > really want a full chad unit, why
> > not just replace it. Would seem the
> > path of least resistance. But open
> > to ideas.
>
> finding the sticky transfer bars is probably the first thing you ought to
> do ... then you will have a working punch, and if you decide to swap for
> another reperf the keyboard bars will already be set up.
>
> w2jc
>
>
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> --
>
> Nick England K4NYW
> www.navy-radio.com
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