I'm developing a simplistic rotary horn speaker based on the 'leslie' speaker but using only very basic 'thrift store' parts. I've been able to make most of the parts myself but now finding it difficult to develop a straight forward 'low voltage' motor / drive.
Currently the custome made 'horn' sits on a 40mm standard bearing with the speaker directly beneath it - I have tried a few different motors (hairdryers - 12v geared motors) - all of which produce too much noise and virbration.
Any ideas on a cheap and chearfull motor soloution! Bearing in mind I'm using really simple hardware, I'm looking to use a direct drive (ie off a wheel or pulley which drives the bearing shaft) - the point of the project is to keep it as simple as possible and not to spend too much on expense or technology (Sort of Steampunk project). I was thinking of using a 'Rega Planar' turn table motor (off ebay for less than £5) or even a desk fan, but not sure they would have enough torque or too much! RPM's are important too - I'll be setting it up to have variable speed so that it should have some range. Size is an issue also, so I'm looking for somthing really simple and that doesnt produce too much noise.
'Alternative' are there any parts that would silence any of the motors already mentioned above! (please note we're based inthe UK so no USA based products or suppliers please).
I'd go with a turntable motor. They're quiet and should spin it just fine. You can always get a Variac to power it and use it to change RPMs.
I used to have a "Leslie" style cabinet that I salvaged from Kimbal organ. It had an AC brushless motor drving it. VERY cool sound!!!
Torque isn't too much of an issue really. Once it gets up to speed the torque can be minimal. In fact, electric motors have peak torque at startup and drop off at higher RPMs, unless you do some cool things with the wiring, but thats's another topic.
Nice one - was in discussion today and had the same thought - simple really, theres plenty lying around nowerdays, plus all the inbuilt wiring should solve my electric problems. Thanks for the info - will defo go for the LP player route.