The Shop > Electronics & IC Programing
Micro 10-30rpm motor suggestions?
Jonfb64:
How about a microwave plate motor. I'm not sure but I think they are about 5 rpm which may be a bit slow but you may be able to gear it up. I find they are generally free as round this way they are left by the the roadside for the scrap man.
Worth experimenting if the cost is zero.
Jon
sparky961:
Maybe a bit Rube Goldberg, but likely quieter than any stepper...
Take virtually any small DC motor and gear it way down using pulleys that fit O-rings, or timing belts if that works better. Have one or more indexing pulses on your disc or whatever that are connected to a simple microcontroller (these have now become ubiquitously referred to as "Arduino" noweadays, regardless of what silicon is behind the system). Use very simple PID to control the motor RPM. There may be some discrete circuit that would work, but with high powered silicon being virtually throw-away there's not much point to look elsewhere.
he RPM pickup could be as simple as a light-interrupting laser-printed encoder wheel or something you've drilled equally on a rotary table setup. Sounds complicated, I know, but the cost would likely be less than the stuff you've been looking at. I guess it depends how tightly controlled you need the RPMs as well. Maybe it would be sufficient to just run it at a fixed voltage you've determined makes the output the speed you want.
nrml:
--- Quote from: raynerd on March 30, 2016, 10:31:05 AM ---
--- Quote from: awemawson on March 30, 2016, 10:18:08 AM ---
Only if you make a mess squeezing the lemons, or drop the sugar sprinkler :lol:
http://uk.farnell.com/sanyo-denki-sanmotion/ss2421-5041/42mm-slim-pancake-stepper-motor/dp/1708572?CMP=KNC-GUK-GEN-SHOPPING-SANYO_DENKI_SANMOTION&CAGPSPN=pla&gross_price=true&gclid=CPmW_5fN6MsCFUa4Gwodl9kMEQ&mckv=fZWTkCpX_dc|pcrid|78108445869|&CAWELAID=120173390000291874
--- End quote ---
Ho Ho Ho :doh:
Thanks for the link Andrew, quite pricey but looks the job. I just looked on eBay and they are £80 there!
--- End quote ---
How about one of these? They cost less than what you pay for a pint in a lot of pubs these days. It should run well on a dirt cheap allegro driver. Only downside is that there is no mention of the torque it produces. http://www.ebay.co.uk/itm/1pcs-Shinano-35MM-stepper-motor-1-8-Two-phase-four-wire-Stepper-motor-/111841354383?hash=item1a0a43a28f:g:T1YAAOSwWTRW2F2A
kayzed1:
try these peeps..
http://www.technobotsonline.com/pololu-298-1-micro-metal-gearmotor.html
Lyn.
millwright:
Chris i have sitting on my desk here a 240v synchronous motor 5rpm but could easily be geared to suit. if you think it may be of use PM with an address and ill post it to you, no charge.
John
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