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Broken part, hard to get, then 3D print it

S

skippy124

Super Member
Hi,

A fellow AK member over this way got in touch re a broken AU517 (same for 417, 519, 717, 719) selector shaft bush. I couldn't help him with a spare, but I thought why not 3D print one.

I removed one from one of one for my 717's and created a 2D drawing. and then was able to arrange to have it drawn up in 3D and then printed. Below is the initial result, the 3D model needs some minor tweaking and a final bush will be printed. Below are a couple of pics showing the original bush and the printed version. The material used is ABS, which will work fine in this application.







Pretty happy with the way this initial unit turned out, and the tweaked version will be even better.

Cheers

John
 
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That is a very very good first pass John, well done :thmbsp:

Imagine that, cutting edge technology used to save Vintage technology :D
 
Nice. Is there a way to actually just print PCB at home? aside from all the Toner x-fer methods and such?
 
I'd guess that the one on the bottom, or left is the original - smoother. 3D printers would need significant resolution and a mathematic equation to do smooth curves.
 
I wonder if you could make a clay mold, bake it, fill it with something, epoxy or melted plastic of some sort, make a close copy of that? 3d printing is the coming thing, but sure complicated (and expensive) at this point. Won't be for long I suspect.
 
tom3 said:
I wonder if you could make a clay mold, bake it, fill it with something, epoxy or melted plastic of some sort, make a close copy of that? 3d printing is the coming thing, but sure complicated (and expensive) at this point. Won't be for long I suspect.
Click to expand...

You need to make a mold of silicone rubber so you can peel it off, and use it more than once. Finding the right resin, plastic, or whatever is the problem. Has to be viscous enough to pour into all the nooks and corners of the mold, yet harden enough to hold the details, and be useful. 3D printing may be a good solution if the cost becomes acceptable.
 
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