jamesp
Cave Dweller
Member since October 2012
Posts: 36,154
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Post by jamesp on Nov 21, 2019 6:44:38 GMT -5
Anyone ever considered using a slow turning ceiling fan motor on a tumbler ? Very quiet. A bit concerned about the start up torque... Then again tumblers are reduction devices. 3/4 inch shaft with an 8 inch barrel is 8/.75 = 10 time more torque. Am I talking to myself ? Please disregard and move on if so compelled. This is a new 225 rpm 1/12 hp ceiling fan motor for $13. Give ya $3 if you can stop the shaft with your fingers. www.surpluscenter.com/Electric-Motors/Single-Phase-AC-Motors/Fan-Air-Conditioner-Motors/Not much 'air over' from a ceiling fan so heat should not be a concern. At 225 rpm you could use small pulleys. Or possibly direct drive to the end of one of the shafts - no pulleys/no belts. ***It does need a capacitor and requires a funky 17mm pulley hole for it's 17mm output shaft. Heck, get a 17mm drill bit and drill a 1/2 inch hole from 12.7 mm to 17 mm using a drill press. Let me plug this one into the barrel speed equation for an 8 inch barrel and 3/4 inch shaft: Two 3 inch pulleys(direct drive): 225 rpm x 3/3(direct drive) x .75/8 = 21 rpm = slow but doable 3 inch motor pulley and 2 inch barrel shaft pulley: 225 rpm x 3/2 x .75/8 = 32 rpm = about right 4 inch motor shaft and 2 inch barrel shaft pulley: 225 rpm x 4/2 x .75/8 = 42 rpm = a bit fast but close, perfect for a 6 inch barrel. Odd, the pulley on the motor would have to be bigger than the pulley on the shaft for 32 and 42 rpm. This interests me: How about a direct shaft drive with no pulley and belt ? Motor directly coupled to one of the barrel shafts. Barrel speed with 1 inch shaft and 8 inch barrel: 225 rpm x 1/1 x 1/8 = 28 rpm. Not bad. It is a shame the motor did not have a 24 inch output/barrel shaft. I think I will buy one(or 3 for that matter at $13), along with the 5 mfd/370 volt capacitors to make it work. Only to try a direct barrel shaft drive tumbler. Just to be a show off he he. I just have to figure out how to connect barrel shaft to motor shaft precisely. The hollow motor shaft is interesting, but that funky mounting system may be aggravating.
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jamesp
Cave Dweller
Member since October 2012
Posts: 36,154
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Post by jamesp on Nov 21, 2019 7:01:23 GMT -5
I see the Drummond man like this. That is big.
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jamesp
Cave Dweller
Member since October 2012
Posts: 36,154
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Post by jamesp on Nov 21, 2019 7:02:37 GMT -5
Waiting for the Captain to come along and beat me down. Where have you been Captain ?
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jamesp
Cave Dweller
Member since October 2012
Posts: 36,154
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Post by jamesp on Nov 21, 2019 7:03:39 GMT -5
Crap, another project on the bucket list. Gotta stay in practice.
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Post by rockjunquie on Nov 21, 2019 7:12:25 GMT -5
Good heavens, do you always think so much so early? No wonder you get so much done. LOL! I have no skilz for motors. I have 10"saw STILL waiting for a motor. One day......
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Post by Drummond Island Rocks on Nov 21, 2019 7:13:15 GMT -5
Will be interesting to see how it handles a load. I am all in favor of using the lowest amount of amp draw to get the job done but at the same time I like my tumbler to turn when I flip the switch with a full load on it. I love the Lortone tumblers but they are a bit under powered needing a push to get going sometimes when turned on. That creates an issue during power outages. Direct drive could be as simple as a shaft with a 17mm hole on side and a 1" hole on the other with a couple set screws. That does not leave an room for misalignment though. Is there a flex joint that could go in between?
Chuck
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Post by rockjunquie on Nov 21, 2019 7:13:39 GMT -5
And, yeah, I have no doubt captbob will smell this out.
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jamesp
Cave Dweller
Member since October 2012
Posts: 36,154
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Post by jamesp on Nov 21, 2019 7:17:53 GMT -5
Done
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jamesp
Cave Dweller
Member since October 2012
Posts: 36,154
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Post by jamesp on Nov 21, 2019 7:19:44 GMT -5
And, yeah, I have no doubt captbob will smell this out. Bob knows not to mess with the jamesp.
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Post by rockjunquie on Nov 21, 2019 7:20:44 GMT -5
And, yeah, I have no doubt captbob will smell this out. Bob knows not to mess with the jamesp.
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jamesp
Cave Dweller
Member since October 2012
Posts: 36,154
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Post by jamesp on Nov 21, 2019 7:27:43 GMT -5
Good heavens, do you always think so much so early? No wonder you get so much done. LOL! I have no skilz for motors. I have 10"saw STILL waiting for a motor. One day...... Your skills manifested in the fine art of stone cutting/polishing. And a master of masters in the art of wire manipulating. Your wire skills blow my mind. Speaking of blown minds... "Why suffer from mental illness, take pride in it" Mornings are think tank time ttt. A real curse. Those surplus and salvage suppliers are addictive. If close by I would hook up yo motor. Maybe the local auto mechanic could get it done for you. Trade skills have become costly and unfortunately a dying breed.
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jamesp
Cave Dweller
Member since October 2012
Posts: 36,154
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Post by jamesp on Nov 21, 2019 7:39:47 GMT -5
Will be interesting to see how it handles a load. I am all in favor of using the lowest amount of amp draw to get the job done but at the same time I like my tumbler to turn when I flip the switch with a full load on it. I love the Lortone tumblers but they are a bit under powered needing a push to get going sometimes when turned on. That creates an issue during power outages. Direct drive could be as simple as a shaft with a 17mm hole on side and a 1" hole on the other with a couple set screws. That does not leave an room for misalignment though. Is there a flex joint that could go in between? Chuck You are speaking the language Chuck. Slow rotation speeds are quiet. Surprisingly so. Funny, I was stopping the home ceiling fan at start up holding it back towards the center of the fan to test it's torque. It is a small fan, doubt it is 1/12 hp. GOT to have enough torque at start up after power out, that is mandatory. Your direct drive idea is right in line w/my thoughts. Could do a cheapo Lovejoy coupling to solve flex. Might could open bore out bigger using home drill press... For prototype the local machine shop could bore the 1 inch shaft 17mm and accurate, then the set screw trick. Hell, it is only 225 rpm.
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Post by rockjunquie on Nov 21, 2019 7:39:49 GMT -5
Good heavens, do you always think so much so early? No wonder you get so much done. LOL! I have no skilz for motors. I have 10"saw STILL waiting for a motor. One day...... Your skills manifested in the fine art of stone cutting/polishing. And a master of masters in the art of wire manipulating. Your wire skills blow my mind. Speaking of blown minds... "Why suffer from mental illness, take pride in it" Mornings are think tank time ttt. A real curse. Those surplus and salvage suppliers are addictive. If close by I would hook up yo motor. Maybe the local auto mechanic could get it done for you. Trade skills have become costly and unfortunately a dying breed. You are too kind, sir.
I have to figure out which motor to get. I think I nailed it down. DH can probably do the rest. Though, he was in smaller electronics, I think he can probably do this. Just gotta get it done.
I tend to get up early, too. (4 this morning, UGH. Not that I like it that early.) But, it takes me awhile to wake up. Need at least 2 cups of coffee. On my second now and getting ready to finish some earrings.
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jamesp
Cave Dweller
Member since October 2012
Posts: 36,154
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Post by jamesp on Nov 21, 2019 8:10:23 GMT -5
People that can sleep late are just plain fortunate rockjunquie. One benefit is early up and early finished for the day. Morning coffee is mighty tasty. Early is quiet with no interruptions, best for planning day, a well planned day is a fast day with lots done. Maybe we are just excited about life !
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Post by 1dave on Nov 21, 2019 10:18:07 GMT -5
3 motors = 3 tumblers - Make one of them a vib!
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jamesp
Cave Dweller
Member since October 2012
Posts: 36,154
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Post by jamesp on Nov 21, 2019 11:15:55 GMT -5
3 motors = 3 tumblers - Make one of them a vib! These ceiling fan motors may be a bit slow at 225 rpm for the vibe Dave. Actually a 3600 rpm motor is about right for a vibe since most vibrate at ~3000 cycles/min. The Vibrasonic motor is a beast at 1/3 hp and 3600 rpm. The next vibe will probably be another used Vibrasonic, but have no need for one other than experimenting. Could use pulleys on a 1725 rpm motor to increase off-balance shaft speed. Learning that sticky slurry is going to require a powerful vibe. It is the way, convinced. And for many materials both soft/hard. A yet thicker slurry and even more powerful low amplitude vibe should do AO 220 to ready for final polish in 24 hours. That may be the next goal. Maybe by increasing the off-set weights on the Vibrasonic.
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jamesp
Cave Dweller
Member since October 2012
Posts: 36,154
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Post by jamesp on Nov 21, 2019 11:17:24 GMT -5
3 motors = 3 tumblers - Make one of them a vib! How about a motor on each of the two barrel shafts for post-traction ? Kidding. These ceiling fan motors may be a bit slow at 225 rpm for the vibe Dave. Actually a 3600 rpm motor is about right for a vibe since most vibrate at ~3000 cycles/min. The Vibrasonic motor is a beast at 1/3 hp and 3600 rpm. The next vibe will probably be another used Vibrasonic, but have no need for one other than experimenting. Could use pulleys on a 1725 rpm motor to increase off-balance shaft speed. Learning that sticky slurry is going to require a powerful vibe. It is the way, convinced. And for many materials both soft/hard. A yet thicker slurry and even more powerful low amplitude vibe should do AO 220 to ready for final polish in 24 hours. That may be the next goal. Maybe by increasing the off-set weights on the Vibrasonic.
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Post by RocksInNJ on Nov 21, 2019 12:23:30 GMT -5
And this is exactly why I could never build my own tumbler.
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cosmetal
starting to spend too much on rocks
Member since September 2018
Posts: 115
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Post by cosmetal on Nov 21, 2019 12:24:37 GMT -5
Done Not trying to "rain on anyone's parade" (pun intended). But, when you build this new tumbler assembly, do you plan on using some sort of weather proof enclosure to house it? forum.rocktumblinghobby.com/post/1075492 It looks like you're outside with your existing tumblers. An exposed capacitor gives me the willies. James
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jamesp
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Member since October 2012
Posts: 36,154
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Post by jamesp on Nov 21, 2019 12:42:58 GMT -5
And this is exactly why I could never build my own tumbler. You can do it rocksinnj. This one is yes a bit complicated.
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