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Discussion Starter · #1 ·
I have a motor I salvaged from a treadmill, connected to a speed controller.

I want to couple the shaft to the base of a tumbler.

What would be my best option?

Thanks
 

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photos of your tumbler setup would help (if you have one).
now - are you wanting to modify an existing tumbler or make a new one from scratch ?
what will the drum be made of ?
 
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Discussion Starter · #4 ·
Belts and pulleys?
I was hoping the speed controller would allow me to use direct drive.

photos of your tumbler setup would help (if you have one).
now - are you wanting to modify an existing tumbler or make a new one from scratch ?
what will the drum be made of ?
Im making one from scratch based on the Triminator.

I was going to post a link but I’m not sure if we are allowed to?

Im not trying to sell it. It’s the most hilariously over priced product in human history.

Camera accessory Cameras & optics Electric blue Auto part Plastic

Tire Wheel Rolling Sports equipment Magenta
 

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ok - next question - what will it tumble ? rocks or clothes ?
yes, you can post a link to something that will better describe your project, if you are not using it for personal gain or to direct members to your YouTube site for promotion.
 

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I was hoping the speed controller would allow me to use direct drive.
It depends on the load. How much current you will need. On the motor it should give you a FLA number or current requirement. Your controller should have overcurrent protection. Could be a fuse. You could play around with it and see.
Belts and pulley can be sized to reduce motor current and may be required.
 

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Discussion Starter · #8 ·
My motor is 500W and set up exactly the same as this.

This is the Triminator.

Hard to believe but that is $5000 in USA, £7500 ($10,256.62) in U.K.

A local sheet metal company will be making the inner barrel.
Initially it was going to be 25” x 12”


Cylinder Font Gas Art Nickel

Im now thinking 15” x 9” will be a better load for the motor at low speed.
 

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I am not sure what the tumbler is supposed to tumble, but anyways, first you need to estimate what speed you want it to spin at. I will guess that to be 300 RPM max.
Next we look at what speed your motor can run. My guess is full speed is in neighborhood of 3000 RPM . The nameplate on the motor should tell you.
So you need about a 10:1 speed reduction, not direct drive.
I think thats a PMDC motor. At very low voltage/speed, I don't think that motor will have much torque available to tumble what is in there.
A gearbox would be ideal. But that would be pretty expensive.
Next best would be belt and pulleys as suggested in the first reply. But you will have difficulty achieving more than 2.5 or 3:1 reduction.
 

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Discussion Starter · #11 ·
I am not sure what the tumbler is supposed to tumble, but anyways, first you need to estimate what speed you want it to spin at. I will guess that to be 300 RPM max.
Next we look at what speed your motor can run. My guess is full speed is in neighborhood of 3000 RPM . The nameplate on the motor should tell you.
So you need about a 10:1 speed reduction, not direct drive.
I think thats a PMDC motor. At very low voltage/speed, I don't think that motor will have much torque available to tumble what is in there.
A gearbox would be ideal. But that would be pretty expensive.
Next best would be belt and pulleys as suggested in the first reply. But you will have difficulty achieving more than 2.5 or 3:1 reduction.
It tumbles dry cannabis buds. They weigh very little.

I think a 25” long 12” diameter barrel would be too much.

15” long with 9” diameter would be better.

The treadmill I took the motor from was new, but it was cheap, Chinese, sold on TV at 3am rubbish.

The motor doesn’t have much info.

I kept the bearings and pulleys as a back up if direct drive isn’t a option.
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OK, so then I am guessing that you want it turning at something like 20-60 RPM
That helps to define how much ratio you need. I still would guess that motor runs at about 2000-3000 RPM at full rated voltage.
What is your plan to support the barrel that will be turning ?
 

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Discussion Starter · #16 ·
OK, so then I am guessing that you want it turning at something like 20-60 RPM
That helps to define how much ratio you need. I still would guess that motor runs at about 2000-3000 RPM at full rated voltage.
What is your plan to support the barrel that will be turning ?
Sorry missed your reply.

Wheels mounted to a frame was my plan
 

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Discussion Starter · #18 ·
Throw your cannabis buds in a cloth bag, and toss them in your clothes dryer on tumble dry, no heat.
I need to collect the material that falls out and it’s sticky.

Im a considering buying a powered soil sieve (rs350/400) to convert though.

Used one for sale locally for the price that I was going to pay to have a barrel made.

If I line it with some type of mesh it should be ok.

I think I will experiment with the treadmill motor before a order any expensive custom made parts. The controller works really well so I’m still hopeful.
 

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Discussion Starter · #20 ·
It’s really fine sticky crystals.

My brother has severe MS and it’s the closest he’s got to medication. I wouldn’t bother with this otherwise.

No change in his brain scan is the excuse for not prescribing MS specific medication, despite him not being able to walk or even play video games (spasticity).

it was a nightmare trying to get a diagnosis. NHS sucks for any neurological so we had to go private.
 
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