[GreenKeys] Reperf punch update

[Nick England]

TA-DA ! All holes punched and accounted for, sir.
http://www.navy-radio.com/tty/28rt/28rt-84.JPG
Many thanks to folks here for help and encouragement.

I'm mainly writing this stuff up for my own notes, but also in case
someone goes searching the archives looking for info on a similar
problem. So yes, the punch slides can wear and this leads to improper
punching. There is felt wick attached to the slide post (the part that
engages the slides to lift them and their associated punch pins), but
it is deep inside and may not get oiled as it should.

In reassembly, my chief issue was getting the perforater drive arm
rocker correctly re-connected to the toggle shaft that wiggles the
toggle bail and toggle link. I didn't find this info in the
adjustments section of the manual I have (perhaps I just missed it),
but it is critical in order for the punch slides to engage the slide
post properly when unlatched and to get re-latched by the reset bail.
Illustration at
http://www.navy-radio.com/tty/28rt/perf-71.JPG

OK, I'll be quiet for a while - next up is getting the TD running on this 28RT.
cheers,
Nick
www.navy-radio.com

On Tue, Aug 3, 2010 at 11:57 AM, Nick England <navy.radio at gmail.com> wrote:
> FWIW, an update on my 28RT reperf project where some holes punched OK
> and others barely poked the tape.
> Evidence at http://www.navy-radio.com/tty/28rt/IMG_2052.JPG
>
>   Well, I finally decided that the punch slides or the slide post
> that moves them really must be worn - the slides for the non-working
> holes clearly had some free play and weren't lifting the pins as far.
>   So last night I gritted my teeth, cleared off my bench, and removed
> the punch sub-assembly (punch block, punch slides, toggle bail, etc. -
> see http://www.navy-radio.com/tty/28rt/perf-71.JPG )
> from the rest of the reperf (selector, transfer latches, frame,
> printer, etc.). This reperf does not have the power backspace so that
> made it easier. Then I sneaked out the two bad punch slides and
> sneaked in some from a busted reperf that I disassembled. I am
> *Extremely Glad* I was able to sneak these slides out/in, as I very
> much doubt I would have ever been able to completely disassemble this
> thing and re-assemble it to working condition - Geez, there are a lot
> of interconnected little parts in these gadgets!!!
>   Then I re-gritted my teeth and attached the punch sub-assembly back
> to the rest of the mechanism, spending a good while fiddling the punch
> slides to mesh with the transfer levers and punch slide latches OK.
> Now all 5 punch pins get pushed up OK, but the selected punch slides
> don't get reset by the punch slide reset bail properly at the end of
> the cycle so I still haven't got something lined up right. I'm hoping
> another session tonight will fix that. Wish me luck.
>   If you have read this far, you must be interested or amused by my
> fumbling novice efforts. Thanks for the help and encouragement - this
> is a great group of folks.
> cheers,
> Nick K4NYW
> www.navy-radio.com
>