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Classic 45 Vinyl

by VeryWetPaint, published

Classic 45 Vinyl by VeryWetPaint Feb 14, 2012

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Summary

This is just a frivolous imitation of a 45-RPM phonograph record, which I built to take advantage of the way my Solido SD300 builds 3D parts out of shiny PVC. But it could also work in ABS if you dip it in acetone to make it shiny!

More pictures at http://mysd300.blogspot.com/2012/02/classic-45-vinyl.html

Instructions

Build record spiral.stl using black material, and (optionally) build label.stl in white or brightly-colored material.

I posted a YouTube video that shows my model being built and how well (badly) it plays on a turntable.

http://www.youtube.com/watch?v=WHHUFu7wgH0

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What does this sound like if you play it? Anyone have a needle they're willing to trash?

Wouldn't it be weird if we could actually print it in a way that it would actually play something? Could we create a model that would vibrate the needle in a way that would actually sound like something? We might not go 45 RPM, but I think it could be done.

There is 3D printed record that plays on a Fisher-Price record player:

http://www.shapeways.com/blog/archives/1179-Video-of-3D-Printed-Record-Playing-Still-Alive-from-Portal.htmlhttp://www.shapeways.com/blog/...

I'm under the impression that it doesn't use the same mechanism as a "real" record player, however.

And this thing here is pretty cool too!

The Fisher-Price "record" player is actually a disc-playing music box. The grooves contain a pattern of small posts that engage teeth that pluck the notes on a musical comb. 3D printing seems like an ideal medium to make custom music discs.

Back in 2009 a Thingiverse user started a project to build custom cylinders for cylinder-type music boxes, but nobody built one AFAIK...
http://www.thingiverse.com/thing:1348http://www.thingiverse.com/thi...

Music Box Cylinder

I think it would be interesting to try to print a musical comb. I wonder how PLA and ABS would sound when plucked :). Alternately, you could print and then tension individual strings of plastic and pluck those.

Maybe one day I will get around to trying out those ideas. But I have too many ideas and not enough time or motivation.

These aren't really grooves because the cutter just makes a narrow 'slice' in the vinyl without actually removing any material; it's just not the v-shaped groove a phonograph needle is designed for.

Vinyl records are generally stamped, and the cutters make a groove with both vertical and horizontal relief (for stereo). But if you were willing to go with a victrola-style needle and horn you might get somewhere. You'd need special software (duh) possibly not even g-code-based to lay out a spiral track and impose perturbations on it. Back of the envelope says if you had a 6" diameter record moving at 45 rpm and could modulate the groove with 0.25mm resolution, you'd be able to reproduce tones as high as about 200 Hz. Cylinders might work better, but to make them work for a recording you'd need to do the outer layer as a true helix...

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