[GreenKeys] Model 14 keyboard adjustment

[Eric Moore]

See attached slow-mo video, I hand cranked and cleaned, but resistance is
still high. I almost want to tin the contacts with solder.

I have been using contact cleaner, perhaps I should move to metal polish? I
was told it may do a better job removing surface oxides, or maybe I should
go at it with some fine sandpaper...

-Eric


On Sat, Aug 5, 2023, 8:45 PM Mike Douglas <deramp5113 at yahoo.com> wrote:

> If this is an R, you should see two high periods of about 22ms within the
> character frame. These high periods occur when those bit position switches
> close, but you’re only getting a brief spike at the instant those switches
> close and open. You need to work on those contacts more. Hand crank the
> keyboard through the bits and verify closed resistance on each bit/switch
> position is an ohm or less.
>
> Mike
>
> > On Aug 5, 2023, at 7:32 PM, Eric Moore <mooreericnyc at gmail.com> wrote:
> > 
> > Hello all!
> >
> > I am working on my 14s keyboard. I have attached a photo and a trace
> from my scope.
> >
> > It looks like it is bouncing? Any ideas how to improve the signal? This
> is R, so 01010
> >
> > Thank you for any help! I have my printer kinda working, I am going to
> use the keyboard to dial in the timing on the governed motor.
> >
> > -Eric
> > <20230805_190327.jpg>
> > <20230721_121647.jpg>
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