jamesp
Cave Dweller 
Member since October 2012
Posts: 36,606
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Post by jamesp on Nov 15, 2019 14:29:14 GMT -5
This is an $9 adjustable from 1.6" to 2.4" if it fits on your motor. It will do say 30 and 45rpm or 24 and 36 rpm or 40 and 60 rpm. All depends on other pulley's size.  |
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Post by TheRock on Nov 15, 2019 14:45:40 GMT -5
I am mobile so I don't have my notes with me. At the moment. I researched this last night for nearly 3hs and I have the most absolute best way to do this. ELECTRONICALLY. From near 0 rpm's to 2000 rpm's without having to do anything but push a button for about the same price he was going to pay for that inline duct fan. I'll BE BACK! THE TERMINATOR, of rock polishing. 😉
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jamesp
Cave Dweller
Member since October 2012
Posts: 36,606
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Post by jamesp on Nov 15, 2019 17:12:16 GMT -5
120 pounds of rock needs a quality 1/4 hp. If running thick slurries then a quality 1/3 hp. This unit did 100 to 130 pounds of rock for 4 years. The 1/4 ran hot, the 1/3 at a healthy temp. Uses one motor with 2 sets of shafts, one fast one slow.  |
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Post by Drummond Island Rocks on Nov 15, 2019 17:22:01 GMT -5
120 pounds of rock needs a quality 1/4 hp. If running thick slurries then a quality 1/3 hp. This unit did 100 to 130 pounds of rock for 4 years. The 1/4 ran hot, the 1/3 at a healthy temp. Uses one motor with 2 sets of shafts, one fast one slow. Reminds me of a rat rod. Fully functional machine with lots of patina. More time and energy spent on performance and less on looks. You have produced many fine tumbles to prove out the engineering portion of that beast. Dual speeds is still on my list of things to try. I have three rows so it would be a simple pulley change to send one set of shafts spinning faster.  Chuck |
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Post by TheRock on Nov 15, 2019 18:09:51 GMT -5
Ok I am now home and just got off the phone with the Technical Department at Automation Direct They have a VFD (Variable Frequency Drive) Model # GS1-10P5 that is Rated Single Phase 110V Input - 3 Phase 220V 1/2 hp Output for $123.00 You can Buy The Special Cable USB-485M for $54.00 This cable Software & Communications Drive configuration and programming software allow the user to connect to a VFD from a PC for fast, convenient setup and/or programming, and offline storage of (multiple) configuration parameters. WEG Electric drive configuration software also allows programming of the built-in PLC. Communication modules, cables, converters, and wiring solutions are also available. You will need a 220V 3phase 1/2 hp motor like this one. So 123.00 for controller + 54.00 For Cable + 79.99 For MTR + $22.51 Shipping For MTR = $279.50 And You can run from 0 RPM to 1725 rpm. And plus run from a PC and get all kinds of info plus you can run the tumbler backwards. All with a program or flick of a switch. It doesn't cost thast much more to go FIRST CLASS!  I Just placed my Order for all of the above better hurry there is only 1 Motor left! jamesp get outta my way.....  I'm takin over the high speed T U M B L I N D I G I T A L Y! In the Video below Shows a GS2 Series Controller in operation, but it works the same as a GS1. Once you see what this Controller will do, without playin around and Fiddling changing speeds with belts and pulleys, (Stone Age) you will love this controller!  |
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Post by TheRock on Nov 15, 2019 18:47:04 GMT -5
With the setup above you will want to run the smallest pulley you can find for the motor, and Large for the Tumbler say 20 to1 ratio: in other words the motor needs to rotate 20 times 1 revolution of the tumbler. So to rotate the barrel 20 revolutions the motor will be going 400 rpms that way the motor doesn't get too hot. But jamesp runs his much faster than that.  anyways so all should be good! |
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Post by captbob on Nov 15, 2019 19:03:32 GMT -5
I'll BE BACK! THE TERMINATOR, of rock polishing. 😉 Quality over quantity there Mr. Terminator ... MacGyver of building shit maybe!
If jamesp isn't in the room. |
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Post by TheRock on Nov 15, 2019 19:26:45 GMT -5
I'll BE BACK! THE TERMINATOR, of rock polishing. 😉 Quality over quantity there Mr. Terminator ... MacGyver of building shit maybe!
If jamesp isn't in the room. Whatever you say CAPT Sponge Bob SQUARE BRITCHES! |
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Post by parfive on Nov 15, 2019 20:33:42 GMT -5
Meanwhile, back on square one . . . the only thing that really matters is how many months you run ‘em in coarse.  |
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Post by TheRock on Nov 15, 2019 20:42:21 GMT -5
Meanwhile, back on square one . . . the only thing that really matters is how many months you run ‘em in coarse.  And the speed in which you run them, And how you achieve that speed Mechanically or Electronically or Both. I commend jamesp on what he has done with his high speed tumblers I'm not that smart, so I hafta cheat a little, and work around it with a VFD to dial it in if I am off on the speed. I can twist a nob and dial it in.  |
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quartz
Cave Dweller
breakin' rocks in the hot sun
Member since February 2010
Posts: 3,359
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Post by quartz on Nov 15, 2019 23:29:31 GMT -5
Ya run 'em too slow they beat each other up and take forever. Ya run 'em too fast they stick to the barrel and don't move around enough. I've found the sweet spot of speed doesn't need hundreds of $ investment as it is fairly narrow, my ears tell the story quite well. And as parfive said, depends a lot on how long you run in rough. |
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El JeffA
spending too much on rocks
Member since February 2016
Posts: 353 
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Post by El JeffA on Nov 16, 2019 0:15:00 GMT -5
Ya run 'em too slow they beat each other up and take forever. Ya run 'em too fast they stick to the barrel and don't move around enough. I've found the sweet spot of speed doesn't need hundreds of $ investment as it is fairly narrow, my ears tell the story quite well. And as parfive said, depends a lot on how long you run in rough. Yep! I’m with quartz on this. The action is in the avalanche of rocks sliding against each other with grinding media (explained quite well by jamesp in one of his posts).. at least in the traditional barrels. If the rotation is too fast, the sliding of rock against rock is not gonna happen. A good slurry (I use plain old pure clay cat litter from Walmart or grocery store) with proper rotation works great. Spin ‘em as fast as you want but they still have to have contact in order to grind. I, too, appreciate the time and effort of jamesp and still use a lot of that knowledge learned here. Run them in rough grind until they are ready to move on. That is what works best...for me. |
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Post by TheRock on Nov 16, 2019 8:30:03 GMT -5
I Thought the Topic was a Variable speed motor for a tumbler? Not how thick the slurry is or how long to tumble.  |
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EricD
Cave Dweller
High in the Mountains
Member since November 2019
Posts: 1,142
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Post by EricD on Nov 16, 2019 9:01:08 GMT -5
Ok I am now home and just got off the phone with the Technical Department at Automation Direct They have a VFD (Variable Frequency Drive) Model # GS1-10P5 that is Rated Single Phase 110V Input - 3 Phase 220V 1/2 hp Output for $123.00 You can Buy The Special Cable USB-485M for $54.00 This cable Software & Communications Drive configuration and programming software allow the user to connect to a VFD from a PC for fast, convenient setup and/or programming, and offline storage of (multiple) configuration parameters. WEG Electric drive configuration software also allows programming of the built-in PLC. Communication modules, cables, converters, and wiring solutions are also available. You will need a 220V 3phase 1/2 hp motor like this one. So 123.00 for controller + 54.00 For Cable + 79.99 For MTR + $22.51 Shipping For MTR = $279.50 And You can run from 0 RPM to 1725 rpm. And plus run from a PC and get all kinds of info plus you can run the tumbler backwards. All with a program or flick of a switch. It doesn't cost thast much more to go FIRST CLASS! I Just placed my Order for all of the above better hurry there is only 1 Motor left! jamesp get outta my way..... I'm takin over the high speed T U M B L I N D I G I T A L Y! In the Video below Shows a GS2 Series Controller in operation, but it works the same as a GS1. Once you see what this Controller will do, without playin around and Fiddling changing speeds with belts and pulleys, (Stone Age) you will love this controller! Dang. I really wish I could justify spending the money for this type of setup. For now I'll stick with my Thumler's A-R12 with ball bearings and a cogged belt/pulleys spinning the barrel at 33 rpm and a top motor temp of 136.
Some day I will dive in and make my own. Thanks for doing the research on this TheRock |
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jamesp
Cave Dweller
Member since October 2012
Posts: 36,606
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Post by jamesp on Nov 16, 2019 10:21:00 GMT -5
If you have a low and a high speed shaft each holding 2 barrels you have a lot of flexibility. For 500-1000-polish 30 rpm with a 6" barrel is about as fast as is needed. Or an 8" barrel will do about 23 rpm on same set of shafts. But same surface speed. No use in varying the speed for 500-1000-polish, a bit slow is safest. Coarse grind is another animal. And it takes about 70% or more of the total tumble time. Use higher speeds, good slurries, more aggressive silicon carbide, taller barrels or whatever tricks you have up your sleeve. It is mechanically simpler to run the fast shafts off one of the slow shafts since it makes gear changes easier being it is the final driven set of shafts. Maybe CVT's(or PIV's) are available cheap these days: CVT/PIV is same principle as this pulley but can be adjusted on the fly: |
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jamesp
Cave Dweller
Member since October 2012
Posts: 36,606
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Post by jamesp on Nov 16, 2019 13:53:14 GMT -5
I Thought the Topic was a Variable speed motor for a tumbler? Not how thick the slurry is or how long to tumble. Isn't tumbling speed relative to a variable speed controller ? |
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jamesp
Cave Dweller
Member since October 2012
Posts: 36,606
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Post by jamesp on Nov 16, 2019 14:00:59 GMT -5
120 pounds of rock needs a quality 1/4 hp. If running thick slurries then a quality 1/3 hp. This unit did 100 to 130 pounds of rock for 4 years. The 1/4 ran hot, the 1/3 at a healthy temp. Uses one motor with 2 sets of shafts, one fast one slow. Reminds me of a rat rod. Fully functional machine with lots of patina. More time and energy spent on performance and less on looks. You have produced many fine tumbles to prove out the engineering portion of that beast. Dual speeds is still on my list of things to try. I have three rows so it would be a simple pulley change to send on set of shafts spinning faster. Chuck The wife calls it Mad Max Chuck. Can I have a super charger ?:  The old rusty rat bike easily turned more heads than any bike I ever owned.  |
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jamesp
Cave Dweller
Member since October 2012
Posts: 36,606
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Post by jamesp on Nov 16, 2019 14:21:38 GMT -5
Big barrels for coarse grind at about 60 rpm. Small barrels for 500-1000-polish at about 27 rpm. Video camera makes them sound louder than they are.
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Deleted
Deleted Member
Member since January 1970
Posts: 0
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Post by Deleted on Nov 16, 2019 15:02:03 GMT -5
Reminds me of a rat rod. Fully functional machine with lots of patina. More time and energy spent on performance and less on looks. Of course, looks can be important, too (see the lady's work in this video), but gotta have the rust! |
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EricD
Cave Dweller
High in the Mountains
Member since November 2019
Posts: 1,142
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Post by EricD on Nov 16, 2019 21:35:10 GMT -5
Big barrels for coarse grind at about 60 rpm. Small barrels for 500-1000-polish at about 27 rpm. Video camera makes them sound louder than they are.
Mine. Ought to take better pictures. And quote the rat rod post instead of the tumbler one:
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I Just placed my Order for all of the above better hurry there is only 1 Motor left! 
I'm takin over the high speed T U M B L I N D I G I T A L Y!
anyways so all should be good!
