vance71975
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Post by vance71975 on Sept 19, 2022 0:11:08 GMT -5
I am in the Process of Putting together the Pieces to Build a Diy Tumbler, I have access to a Free motor, that is a 1hp Dayton AC Induction Motor Model Number 6k321-C, the Only Problem I am running into is that it spins at 1750 RPM. I know you can slow that with a Large Pully on the Drive shaft, the Problem is, I would need something like a 40 inch Diameter Pully to slow it down enough. The Other thing I am looking at is a 1HP 110V 1 Phase Input 3 Phase 0-400HZ Output 10A Variable Frequency Drive Controller Vector Control Inverter Converter for CNC Motor and Spindle But I am not 100% sure if it will work with the motor I have. Anyone in the know with mechanical or Engineering that can tell me if that control inverter converter is what I need to slow/control the rpm?
Also Wondering should I go three or 4 foot shafts? I am looking at 1/2 in Zinc Alloy Steel 1/2" x 36" and trying to figure out a way to have it so I have a center spining drive shaft and a second bar on each side so that i can double up the number of barrels. I was wondering if I Mount the Drive shaft Higher up than the second roller if I could make sort of a Triangle so that i can lean barrels against the drive shaft on Both sides of it, and effectively Double the number of barrels i can put on it. Those in the know with this kinda thing, do you think that would work?
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Post by rmf on Sept 19, 2022 5:09:22 GMT -5
vance71975 The issue with speed will also be determined by the barrel you use and the shaft diameter. I have a tumbler with a 3/4HP motor and I would have to go measure (Not going to do it now) but about a 1" motor pulley to a 7 or 8" pulley on a 1" shaft going to drums about 15" gives about 35 rpm on the barrel. The last reduction is from the shaft to the drum so do not forget that. FYI, I made a tumbler with a 3/4 hp motor and it cost so much to tumble I had to add a second tier to my tumbler. The cost for EE for a month of tumbling was noticable on my power bill. Sometimes free is not cheap.
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vance71975
freely admits to licking rocks
Member since September 2022
Posts: 760
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Post by vance71975 on Sept 19, 2022 11:36:06 GMT -5
vance71975 The issue with speed will also be determined by the barrel you use and the shaft diameter. I have a tumbler with a 3/4HP motor and I would have to go measure (Not going to do it now) but about a 1" motor pulley to a 7 or 8" pulley on a 1" shaft going to drums about 15" gives about 35 rpm on the barrel. The last reduction is from the shaft to the drum so do not forget that. FYI, I made a tumbler with a 3/4 hp motor and it cost so much to tumble I had to add a second tier to my tumbler. The cost for EE for a month of tumbling was noticable on my power bill. Sometimes free is not cheap. I used an Online Pully calc thing, and It said I would need like a 40 inch drive pully to slow the speed down to under 100 rpm? Do you think, at least as far as the speed goes, that the controller I listed would work? Here is a link to it: www.amazon.com/dp/B09P32PZ7Y/?coliid=IPUVQARSQ5BK8&colid=1WG8PRVDIAXDG&ref_=lv_ov_lig_dp_it&th=1I may have to look for a Differnt motor option if the controller wont work on it. But honestly from what you said, Maybe I should be looking for a 1hp DC motor anyway just do to cost to run. DC motors are cheaper to run right? I seem to recall a Mich Rocks Video where he used Killawatt on the motors and the DC motor was like 0.72 cents a month to run. In fact his Big Cabinat Tumbler looks like its about the same motor I have and he said its like 16 and change a month to run, What kinda increase were you talking on your power bill with the 3/4 hp motor?
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quartz
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Post by quartz on Sept 19, 2022 22:58:50 GMT -5
That motor controller works with 3 phase motors, a whole different operational concept than single phase induction motors. Fellow named Jeremy Fielding has an excellent video on You Tube explaining motors and how they differ. Re-do your online speed calculator or put some drive parts dimensions on here for some help, something wrong with the numbers. Don't forget to include the barrel diameter in the calculation. You said zinc-steel rods, I assume galvanized steel is what you are talking about. Normally that material runs oversize, won't fit the bearings unless you are figuring to machine it down some on the ends. Generally cold rolled steel is used as it is sized precise enough to fit bearing bores. Don't mean to rain hard on your parade, sharing from experience. I run a double 5-gallon tumbler, 100 lbs. product, 100 lbs barrels, water, grit when both are full, ~7/16 hp motor runs a variable 12-18 RPM {adjustable pulley} on the barrels, costs me a bit under $20/ month.
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Post by rmf on Sept 20, 2022 3:31:56 GMT -5
Is your motor Single phase or 3-phase? Not sure what the amazon converter would do for a single phase motor. Not an electrician.
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079a7
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Post by 079a7 on Oct 15, 2022 10:22:06 GMT -5
Looking it up, I couldn't find an exact match, but I'm pretty sure that is a single phase motor. Your VFD needs a 3-phase motor. Maybe look into a gearbox.
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brybry
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Post by brybry on Oct 15, 2022 10:49:50 GMT -5
From jamesphave a simple formula for calculating barrel speed caupwhiting. You must know BARREL DIAMETER. (shaft diameter divided by barrel diameter) times(small pulley divided by big pulleY) times motor RPM. 7/16 = .44 so .44/barrel diameter X 2/7 x 1725 = barrel rpm. say barrel diameter is 7 inches then .44/7 x 2/7 x 1725 = 30.8 rpm for 1 inch motor pulley the speed would be cut 1inch/2inch = 1/2 x 30.8 rpm = 15.4 rpm. Again, you must know barrel diameter, it is part of the ratios of speed reduction from 1725.
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brybry
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Post by brybry on Oct 15, 2022 10:50:34 GMT -5
That's what I used to figure out my tumbler build
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brybry
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Post by brybry on Oct 15, 2022 11:52:41 GMT -5
That 1hp motor will kill your power bill. I have my 40T and 2 Rebel 17 barrels spinning on a 1/4hp motor and I KNOW I'm spinning over 100lbs easily. It'll spin up from a dead stop.
Look into checking out used motors from A/C & furnace companies. May have to put a fan on it but better than a $100 or more a month to spin a couple barrels.
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