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<blockquote data-quote="Silas Pradetto" data-source="post: 43334" data-attributes="member: 34">Re: Help needed- rotating drum riserOnly 3-phase motors can be easily reversed with a simple switch. Single phase motors have to be wound for it, or you need a transmission.I&#039;d actually recommend a 3-phase or DC motor with an industrial variable-speed drive. You can probably pick one of these up pretty cheaply on eBay, and you wouldn&#039;t have to worry about gear reduction so much since motors on such drives are pretty much constant-torque at any RPM.I think a roller switch with a detent welded to the frame could stop the motor at the center position.You&#039;re going to need a big bearing or something for it to rotate on, maybe you could make one with some channel and a bunch of ball bearings?If you&#039;re going to go that far, it needs to be able to rotate infinitely, so you are probably going to need to get a lot of wireless channels <img src="https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f642.png" class="smilie smilie--emoji" loading="lazy" width="64" height="64" alt=":)" title="Smile&nbsp; &nbsp; :)"&nbsp; data-smilie="1"data-shortname=":)" />I just don&#039;t know how you&#039;re going to implement control - is this something that will happen in specific songs, is it completely random, how will it be used?</blockquote>

[QUOTE="Silas Pradetto, post: 43334, member: 34"] Re: Help needed- rotating drum riser Only 3-phase motors can be easily reversed with a simple switch. Single phase motors have to be wound for it, or you need a transmission. I'd actually recommend a 3-phase or DC motor with an industrial variable-speed drive. You can probably pick one of these up pretty cheaply on eBay, and you wouldn't have to worry about gear reduction so much since motors on such drives are pretty much constant-torque at any RPM. I think a roller switch with a detent welded to the frame could stop the motor at the center position. You're going to need a big bearing or something for it to rotate on, maybe you could make one with some channel and a bunch of ball bearings? If you're going to go that far, it needs to be able to rotate infinitely, so you are probably going to need to get a lot of wireless channels :) I just don't know how you're going to implement control - is this something that will happen in specific songs, is it completely random, how will it be used? [/QUOTE]

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