Ball Mill Motor

[50caliber]

I've almost finished my ball mill except the motor, I bought a motor that was used for sliding doors and it has a this thing called thermaltrip which means it turns off the motor when it overheats, the motor overheats every 20 minutes and I later found out it was because these types of motors are designed to only deliver short powerful bursts of power so it was useless for a ball mill. I then bought a washing machine motor. ( http://www.trademe.co.nz/Browse/Listing.aspx?id=79893767 )

and i am stuck. I have know idea which wires go where or if I can even use it on 230V power. If someone could help me it is appreciated

[Frozentech]

I've almost finished my ball mill except the motor, I bought a motor that was used for sliding doors and it has a this thing called thermaltrip which means it turns off the motor when it overheats, the motor overheats every 20 minutes and I later found out it was because these types of motors are designed to only deliver short powerful bursts of power so it was useless for a ball mill. I then bought a washing machine motor. ( http://www.trademe.co.nz/Browse/Listing.aspx?id=79893767 )

and i am stuck. I have know idea which wires go where or if I can even use it on 230V power. If someone could help me it is appreciated

Looks like that is intended to be used as a driven generator, not a motor. Also, an open design like that is very poor for a ball mill. Eventually BP will spill into it !

 

You did not say anything about your mill design. What size jar and media do you intend to use, and what is optimum RPM for that combination ? How will achieve that RPM ? ( belt and pulley reduction, gear drive, etc ) More info is needed to make any kind of motor recommendation.

[50caliber]

hi, sorry about that, i was just going to take pictures but it seems my digital cameras broken so I took some pictures on my cellphone(sorry about quality

I think the optimum speed is 92rpm

My jar is a pvc pipe with two end caps, its 180mm long, 105mm ID, 109mm OD and i have 17.1mm lead milling media

its a 24 pole motor

the belt is around a pulley then goes around the jar which makes it spin about 80rpm

[Ozzy]

Is There 3 wires?

[50caliber]

na there is 11

[Ozzy]

na there is 11

model number or type of washer it came out of?

[50caliber]

the most information i found about it was on this page http://www.trademe.co.nz/Browse/Listing.aspx?id=79893767

[50caliber]

looks like I need to get a motor thats continuious rating, do you think 1/4 hp will be alright?

[Boomer]

BLDC meens brushless DC. It needs a transistor power stage to switch the different windings on/off in the right order as it turns. Inside is a perm magnet that follows the poles as the windings are energised.

 

No way you get this going just from the mains (unless you are lucky and it has the right impedance at 50 Hz to just connect one winding and spin-start it by hand - but unlikely, you'll most likely blow the breaker and/or the motor).

[Ozzy]

Just find the neutral wire and you should be able to find the speeds. Maybe...

[brainfever]

I experimented with a washine machine motor aswell.

 

Find a 100W light and rig it in series with the assumed motor winding. Now you can try wire per wire.

Mark the ones where the light burns at max brightness, those are you breaker tripping lines that you don't want to try without a lamp.

 

Your motor won't receive full power with a 100W lamp in series, but it can give you an estimate of the possibilities.

 

For the record, my experience with these types of engines is that they totally suck for this (I found a high rpm winding that had to be turned by hand to get it moving), unless you can build the right installation to power the engine.

[cplmac]

That motor is 3 phase, you will need a 3 phase supply, in other words at least 230V. The reason there are so many wires on the motor is because depending on the voltage you are wiring it up to you will need to connect different wires, i.e. 230V 460V etc. I have a feeling that motor is going to be useless to you. You might want to try something like a fan motor from a box fan or oscillating fan. They will run on 120V and are built to run continuousely for long periods of time, and they can be had for not a lot of money. I like the skate board trucks, good idea.

[50caliber]

I'm in New Zealand so we have 230V. Do you think a fan motor will be powerful enough? Won't it also be runing at a very high rpm to?

[Rocket007]

Ammm. My motor is a 12V motor with 50 RPM . It is realy very strong

A transformer and some other stuff hellps to make it safe and strong.

 

 

video and pictures

 

 

lp

[50caliber]

cheers, I don't think I can use DC motors cause the converters are realy expensive

[cplmac]

I definately think a fan motor will be strong enough, especially considering all the gear reduction you are going to do to get your speed right.

[Bamboozler]

Sorry for unearthing this old thread, being the first post I can't start my own yet, so I'm piggy backing on one that is relevant.

 

Just wanted to give someone who may be starting on a ball mill fabrication project a heads up on a decent but inexpensive motor for the project. Only one available after I bought the other, but good specs for a ball mill:

 

• Marathon Electric (New old stock)
• 115/230
• 1/2HP
• 3450 RPM
• Constant Duty
• TEFC Enclosure
• Thermally Protected
• $109.90 Shipped

https://www.electronicsurplus.com/marathon-56c34f5544-motor-ac-1p-115-208-230vac-1-2hp-3450rpm