Gallery, Projects and General > How do I??

Dial for old scales

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RussellT:
Phil, John - SALTER got left behind while I was moving it all to the middle of the page - thanks for pointing it out - I'd have been annoyed if I hadn't noticed it before I'd finished.

Phil, I could do something like yours - but I'm trying to make it fancy.  I have thought about doing a metric dial on the back of the imperial one.  Interestingly I found a picture of an original metric scale which was calibrated to 15 kilos (about 33 pounds) - I think they would just have adjusted the bar that goes through the spring to make the spring shorter.

Russ, the original was white paint on tin plate, with the design printed or stencilled on.

Andrew, that is a very good idea.  I had actually thought of that but dismissed it because I thought it would be difficult to get a printout without pinholes in the large white areas, but you prompted me to look again, and I discovered negative photoresist.  I've never done circuit boards like that - I generally use press'n'peel.  I will investigate further.

Russell

RussellT:
Hi All

Happy New Year!

It's amazing how projects can drag on isn't it. :med: :coffee:

Sometimes there are legitimate reasons, like waiting for materials, practicing a new technique, cleaning up previous attempts to try again, watching YouTube videos to learn the technique, avoiding exposing photosensitive stuff to brilliant sunshine, attempts to refine the UV exposure time, building a UV exposure platform, watching the YouTube videos again as you've forgotten what they said or it didn't work like they said :bang:.

Then there are the other reasons too, like having more important things to do, getting distracted by watching irrelevant YouTube videos, holidays, decorating, grass cutting and other family stuff.

However, I have at last finished this project.  I used dry photosensitive film intended for making circuit boards as Andrew suggested and I'm very pleased with the way it turned out.

Thanks again to Andrew for the suggestion.

Here are some pictures.

Russell

BillTodd:
Beautiful job  :clap:

awemawson:
Excellent result

RussellT:
Thank you both.

Having worked out how to do it I'm now thinking about the possibilities for custom panels and labels.

Russell

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