ch3mical0ne Posted August 18, 2013 Posted August 18, 2013 Hey guys been having troubles with my mills lateley they seem to keep burning out or stop working after a few hours of use.i dont have much info on electric motors managed to get pics of the last two motors that stopped working!Im not even sure if i am suppose to add on any more electric components etc please help guys much appreciated!!
Bobosan Posted August 18, 2013 Posted August 18, 2013 Looks like you have a capacitor start motor that you must have wired correctly or it wouldn't go. I don't see any kind of shaft bearings in use. Friction may be causing excessive strain on motor before you even place jar on the rollers. 1
ch3mical0ne Posted August 18, 2013 Author Posted August 18, 2013 Looks like you have a capacitor start motor that you must have wired correctly or it wouldn't go. I don't see any kind of shaft bearings in use. Friction may be causing excessive strain on motor before you even place jar on the rollers. thank you,can strain from no bearings cause the motor to blow?would a fired fan be any benefit?I only have two bearings actually and can seem to get them to fit anywhere or on any rollers i have. sucks!got this nice printer roller but cant seem to get in placed properly,doesnt fit in bearings,
Bobosan Posted August 19, 2013 Posted August 19, 2013 thank you,can strain from no bearings cause the motor to blow? Sure could. The motor is probably overheating. would a fired fan be any benefit? Yes it would help but you still have a lot of friction with the shafts in the wood. I only have two bearings actually and can seem to get them to fit anywhere or on any rollers i have. sucks!got this nice printer roller but cant seem to get in placed properly,doesnt fit in bearings, If you have access to hardware store you may be able to get proper bearings for shafts you have on hand.
ch3mical0ne Posted August 19, 2013 Author Posted August 19, 2013 It starting working again today with a little push,why could this be?Anyone know much about connecting transformers to motors
eb11 Posted August 19, 2013 Posted August 19, 2013 If it started working with a push and its a single phase motor then something is wrong with the start winding or the capacitor is bad
AdmiralDonSnider Posted August 19, 2013 Posted August 19, 2013 One often overlooked fact is that many motors simply are not designed for continous operation and overheat even after only one hour of use.
FlaMtnBkr Posted August 30, 2013 Posted August 30, 2013 I doubt that is a continous duty motor and is quickly overheating. Adding a belt in line with some pulleys will help trying to align the shaft of the motor with the drive roller of the mill. Also, I doubt you will be able to turn much weight with that metal drive roller. It needs some type of coating to give it traction and grip your mill jar. Might want to search for some pictures of ball mills and shoot for a more traditional design.
pex Posted May 21, 2014 Posted May 21, 2014 Does any one now or this is a good motor for ball mill. And how do i connect it to power. There are six wire
Arthur Posted May 21, 2014 Posted May 21, 2014 If it stalls the motor IS overloaded, reduce the load a LOT that means less media, less powder, and better -lubricated bearings. As the motor now starts when pushed it's likely that the start coil is burned out or the start cap is blown. Buy a mill and run it at less that the rated load. No 2 pound mill lasts long with 10 pounds of lead and a pound of ingredients inside.
Jakenbake Posted May 21, 2014 Posted May 21, 2014 (edited) That is a 240 or 440 volt motor. Do you have at least 240 volts to run it off of? Even if you did after taking a second look at the amp draw of that motor it needs much more torque to run a mill. Using that motor would be a fire hazard. Edited May 21, 2014 by Jakenbake
MrB Posted May 21, 2014 Posted May 21, 2014 That is a 240 or 440 volt motor. Do you have at least 240 volts to run it off of? Even if you did after taking a second look at the amp draw of that motor it needs much more torque to run a mill. Using that motor would be a fire hazard.I'm not sure it would be a fire hazard by means of the A's... It's a 6-8w unit if i read that right. It might burn out, but it shouldn't ever get hot enough to set fire to anything... Anyway, it's much to weak for a useful mill, if i'm reading the info right.B!
Bobosan Posted May 21, 2014 Posted May 21, 2014 The physical size alone kind of says it's to small for a large mill. Perhaps a 6lb harbor freight type mill it would suffice.
taiwanluthiers Posted May 25, 2014 Posted May 25, 2014 That's not the right motor for a ball mill. It looks like a fan motor which means without a fan blade to move air past it the motor has no means of cooling, so it will burn out. What you need is an AC induction motor like the kind found on a drill press, table saw, etc.. They are TEFC so nothing gets in and a fan inside keeps the motor cool. They are rated for continuous duty and are quite large even for a small (1/4HP) motor. Look on ebay or at a flea market for an old useless drill press and gut it for the motor.
Jakenbake Posted May 25, 2014 Posted May 25, 2014 (edited) I'm not sure it would be a fire hazard by means of the A's... It's a 6-8w unit if i read that right. It might burn out, but it shouldn't ever get hot enough to set fire to anything... Anyway, it's much to weak for a useful mill, if i'm reading the info right.B!Just by looking at the current draw of the motor you can see that it has very little power. Now you place that motor in a high torque application with a jar full of flammable comp. within a couple of feet from it and I would call it a fire hazard. Most 240v outlets are 20-30 amps on this side of the pond. That motor is going to be very hot (I mean burnt paint and flames) before it throws that breaker.Every day we are all faced with risks and decisions. Some are avoidable. Edited May 25, 2014 by Jakenbake
Arthur Posted May 25, 2014 Posted May 25, 2014 Probably you would be more successful if you purchased a rock tumbler and loaded the drum to the maker's weight limit. It will work but may not take much powder per batch. Otherwise your engineering skills need to take a quantum leap forward to build a frame with good lubricated bearings for the shafts and rollers, to chose a good motor and to get the speeds right. A typical drum needs to turn at about 70 - 80 rpm. A good motor will be about 1/8 to 1/4 HP, will rotate about 2000 - 3000 rpm and be TEFC or better. Chose one that is intended for continuous duty as a 12 hour ball mill run is beyond most short duty motors. Without the engineering skills you just buy a ball mill, it's cheaper than wasting motors and time
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