<div dir="auto">The gears were made in a molding process, with POM. But they deformed slightly, and the mold was't accurate enough. Normally gears are made with specific tooling, much like wood turning process. However, once you go outside standard 'module' dimensions it no longer works. I've been told that 3d printed surfaces are too rough for obtaining durable gears... And then the price.<div dir="auto"><div dir="auto"><br></div><div dir="auto">Rutger </div></div></div><div class="gmail_extra"><br><div class="gmail_quote">Op 22 okt. 2017 16:02 schreef "Ingo Debus" <<a href="mailto:igg.debus@gmail.com">igg.debus@gmail.com</a>>:<br type="attribution"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><br>
> Am 22.10.2017 um 15:18 schrieb Rutger Vlek <<a href="mailto:rutgervlek@gmail.com">rutgervlek@gmail.com</a>>:<br>
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> I have a decision to make on what to do with a 1970's tone wheel organ. I bought it cheap a few years ago. It's a Pari Attack, Italian Hammond clone.<br>
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Ah, a Pari! Definitely a rarity. Myself I own a Parie (with e), which is an even stranger beast.<br>
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How were the replacement gears made? Milled or 3D-printed? If 3D-printed, which method? Laser-sintered parts can be very accurate and sturdy. See my 3D-printed Hammond switch replacement:<br>
<a href="https://photos.app.goo.gl/piZQe7cst7gFj12G3" rel="noreferrer" target="_blank">https://photos.app.goo.gl/<wbr>piZQe7cst7gFj12G3</a><br>
But if you need many parts, this will get expensive.<br>
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What’s the revolution speed of the tone wheels? Maybe you can use twelve stepper motors?<br>
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One question out of curiosity: how is the vibrato scanner driven? Also via gears? In my Parie, both the tone wheels and the scanner are belt driven. Unlike on a Hammond, it's very easy to change the speed of the scanner (just remove the belt and spin it by hand). A very slow scanner vibrato sounds awesome.<br>
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Ingo<br>
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