On Aug 9, 2023, at 10:22 PM, Eric Moore <[email protected]> wrote:
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...-EricOn Sat, Aug 5, 2023, 8:45 PM Mike Douglas <[email protected]> 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 <[email protected]> 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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