[GreenKeys] 14 punch bias?

[John, W9DDD]

A close look seems to indication that the punch pins are all going a 
little too far.  The hinge side of the chad appears to have some tearing 
that raises the hinged side above the rest of the tape.  Worse on #5 pin 
to the point of tearing the edge off.

I see a screw labeled upstop screw.  That looks like it would be the 
adjustment to change the stroke length of the punch pins.  I haven't 
found the paragraph which describes its adjustment yet. (figure 49 in 
165B PDF page #82)  Figure 44 on PDF page # 83 appears to indicate the 
allowed difference in distance between the bottom of the punch pin and 
the punch selector fingers.

I think I need to do a little more research because I think I see 
another possible place to make an adjustment.

https://www.navy-radio.com/manuals/tty/jh/ttyman4/TeletypeManuals/model14/165B_Change1.pdf

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The above comments or recommendations are SWAG. Use at your own risk.
John, W9DDD

On 1/4/2022 3:03 PM, steve bennett wrote:
> Sharpen it? Take a close look. Is it dull?
>
> On Tuesday, January 4, 2022, 03:59:08 PM EST, John W9DDD 
> <w9ddd at tapr.org> wrote:
>
>
> I seem to be closing in on this one, but the #5 punch is shall we say 
> a little aggressive.  This is a chadless punch, but I'm getting chads 
> at times from #5 punch pin and it ends up at times having that edge of 
> the tape splitting off.  Any adjustments I've identified would seem to 
> affect all 5 pins.
>
> Hints gratefully accepted.
>
> Oh I almost forgot, perhaps the old semi brittle tape contributes to 
> the problem?
>
> John, W9DDD
>
>
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