jamesp
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Post by jamesp on Dec 8, 2016 10:08:07 GMT -5
How about this theory as to why it's happening. The coriolis effect meaning the flow is rolling but a slow migration to the right. And since the slurry and the small rocks will settle to the bottom or in this case the right side. If you put a baffle, you will end up with two zones of the same thing, slurry and small to the right. If you put openings in the baffle then it will only allow the small to migrate to the right most zone and you are right back where you started. And if this theory is correct and you were running this in the Southern Hemisphere the small and slurry would be to the left. Since this is a rectangle rather than a circle, all the small gets trapped in the right side. In the circular vibration barrels the flow is to the right but there is no corner to get trapped in, so everything stays dispersed. I suppose that means that for the circular vibration tumblers the flow would be to the left in the Southern Hemisphere. Ok that's as good as I can do without a couple of beers. and it's way too early for that. H i have adjusted the left or right counterbalances. More off balance on left sends them to the right. I have adjusted the left or right counterbalances Henry. More off balance on left sends them to the right. More off balance on the right sends them to the left. Reading about long tub industrial hopper vibes and found they have this instability. And donut shaped vibe hoppers can have dead spots. It boils down to mechanical instability, impossible to get left and right perfectly balanced. Even a tiny difference in difference in a tumbler will over the 2-3 day run send large to one side and small to the other side. I think the best I can do is put dividers in and use pea sized media on each big rock in each compartment. Hopefully the separation will be minimal and pea media will contact big rock. But if 3 big rocks walk down to one end without separation they beat against each other badly. Bad day.
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jamesp
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Post by jamesp on Dec 8, 2016 10:13:17 GMT -5
Rick, so the divider would have openings and allow each section to have the small rocks mix ? Basically a baffle for the big rocks ? Just remember, I am having trouble with the smallest rocks migrate to the right, along with the slurry. To the point the left side wants to run dry. Like a vertical separator, except it is horizontal. Damn thing. The separators may best be sealed. Looking for a fatter hopper that has better mixing too. But, big rocks can still bump into each other w/fat hopper. May be best to have 3 separate hoppers for total isolation. Here is a Viking set up with two 4 pound hoppers. This would work too, big stone in each hopper: jamesp, I thought it would be OK if maybe the rocks were allowed to move back/forth, and that would keep the grit and everything more-evenly distributed. That's not vital, especially if you would rather keep the two almost as separate chambers. I don't know how precisely you could match the interior shape of your drum with an insert, but assuming you could, I was envisioning something that looks like my "ghetto-CAD" drawing below... __________________________________ | -------------------------------- | | | | | | | | | | | -------------------------------- | |__________________________________|
Obviously, it would need to fit a TEENY bit better than my awesome rendering, but if you left the spacing on the left/right sides, the divider could float back/forth with the material. That may be a bad thing, in which case, you could either just clamp it in place or use shims on the sides to hold it. Heck, if you got thick enough material, you could put dadoes in every inch or so on the top/bottom, and make them the full width of the hopper, and then just slide in the divider(s) to create whatever size hoppers you wanted. If you did that, you *may* want to make that a box instead of an H, just so the structure was more-rigid. You could even put a bottom in it if you REALLY wanted to contain things. Then it could be like a drawer divider. I'm just not sure what the contour of the bottom of your hopper is, and if that would work well. I know you can heat/shape that stuff, but at that point, you might just as well make a whole hopper rig yourself. Oooh, lightbulb moment!!! If you need to make it round on the bottom, you could take a length of PVC the width of the hopper, cut a line along the top, and then heat-bend the PVC into a U-shape channel that would fit inside the hopper. The dividers would be a bit trickier proposition at that point, but I have some ideas if you're interested... Rick is on to this project. Let me try the rubber first. They need to be removable so I can clean them 100% to get rid of potential trapped grit. I need to find some 3/4" rubber. 3/4" thick rubber is darn hard to find. May have to cut it out of the sidewall of a tractor tire, no fun.
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Post by wigglinrocks on Dec 8, 2016 11:10:15 GMT -5
Maybe find a piece of conveyer belt . Like from a gravel or excavating business . I have a big chunk of it but think it is about half inch thick . Tough stuff .
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jamesp
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Post by jamesp on Dec 8, 2016 11:24:19 GMT -5
Maybe find a piece of conveyer belt . Like from a gravel or excavating business . I have a big chunk of it but think it is about half inch thick . Tough stuff . I have 3/8" conveyer wigglin. Hard to beat that stuff. Would prefer 3/4" but 1/2" should work if it is rigid enough to wedge in the contour. Just got to get off duff and go find it.
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Post by captbob on Dec 8, 2016 11:30:20 GMT -5
Fire hose? Grit may embed in hose, have different pieces for different grits.
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jamesp
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Post by jamesp on Dec 8, 2016 18:17:32 GMT -5
Fire hose? Grit may embed in hose, have different pieces for different grits. Cut fire hose for compartments ?
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huskeric
spending too much on rocks
Member since May 2016
Posts: 353
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Post by huskeric on Dec 8, 2016 18:43:06 GMT -5
Maybe find a piece of conveyer belt . Like from a gravel or excavating business . I have a big chunk of it but think it is about half inch thick . Tough stuff . I have flooring in my exercise room in the basement that's 3/8" and I can't imagine you needing more than that. www.rubberflooringinc.com/rubber-roll/commercial-rubber-roll.htmlYou could also look at just finding an exercise mat. That would be less of an investment. Otherwise, check Craigslist or eBay for some scraps.
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jamesp
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Post by jamesp on Dec 8, 2016 19:36:48 GMT -5
Maybe find a piece of conveyer belt . Like from a gravel or excavating business . I have a big chunk of it but think it is about half inch thick . Tough stuff . I have flooring in my exercise room in the basement that's 3/8" and I can't imagine you needing more than that. www.rubberflooringinc.com/rubber-roll/commercial-rubber-roll.htmlYou could also look at just finding an exercise mat. That would be less of an investment. Otherwise, check Craigslist or eBay for some scraps. I am not sure how much force will be on that rubber. I want to cut it just oversize so that it will wedge tight. The hopper is about 6 inches round, kind of big. I don't know how thick it needs to be to wedge well. But not hard like polyethylene. If I had 3/8 I would sure try it. Especially if it was on the stiff side. I have good access to industrial materials at a couple of scrap yards up in the big city. I just need to go shop around. I was going to cut it to shape on the band saw. I also thought about 3 small thick 6 mil bags left loose on the top. Fill each bag with media and a big rock and drop them in side by side, 3 wide. Fold the top of the bags over and clamp the top of the hopper down on them. They are used at Fastenal, bolt bags, tough.
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jamesp
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Post by jamesp on Dec 22, 2016 9:28:54 GMT -5
Self collected Georgia coral with a lot of places to collect grit. Never did and not sure why. SiC 30 to a lazy AO 80 in rotary. To vibe with short AO 500 run. Added AO 14,000 the last 8 hours with out vibe clean out. 3 steps Lazy(8 days) run in AO 80 reduced vibe time. Liking the AO 80 run in the rotary.
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ChicagoDave
has rocks in the head
Member since June 2016
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Post by ChicagoDave on Dec 22, 2016 9:58:51 GMT -5
Wow, that's beautiful!
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jamesp
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Post by jamesp on Dec 22, 2016 20:39:48 GMT -5
Thank you sir.
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Post by orrum on Dec 22, 2016 20:47:14 GMT -5
Wow great critters in the rock!!!
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jamesp
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Post by jamesp on Dec 22, 2016 21:11:53 GMT -5
Wow great critters in the rock!!! Wish GA/FL coral was easier to find with polyps like that. More like 1 in a 1000. Indonesia coral commonly has the critters.
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Fossilman
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Post by Fossilman on Dec 22, 2016 21:56:32 GMT -5
Totally cool coral James!!!!!!!!!!!!!
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Deleted
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Post by Deleted on Dec 22, 2016 22:14:42 GMT -5
💰
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Sabre52
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Me and my gal, Rosie
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Post by Sabre52 on Dec 22, 2016 23:03:47 GMT -5
Wow James, very cool specimen. Really like the well defined polyps. Easily as nice as the Indonesian material. That honey color is really awesome, is that the natural color or was the coral head heat treated before the tumble?.....Mel
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jamesp
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Post by jamesp on Dec 22, 2016 23:06:40 GMT -5
Wow James, very cool specimen. Really like the well defined polyps. Easily as nice as the Indonesian material. That honey color is really awesome, is that the natural color or was the coral head heat treated before the tumble?.....Mel No heat Mel. Probably would have gone orangey colored.
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jamesp
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Post by jamesp on Dec 22, 2016 23:08:19 GMT -5
Totally cool coral James!!!!!!!!!!!!! Been looking for a mother load vein of the same. There is a spot in the river where the polyps are better.
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jamesp
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Post by jamesp on Dec 22, 2016 23:11:12 GMT -5
Cotton Headed Ninny Muggins. Are you related to Knappy Headed Sap Sucker ?
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Deleted
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Post by Deleted on Dec 22, 2016 23:13:39 GMT -5
Cotton Headed Ninny Muggins. Are you related to Knappy Headed Sap Sucker ? Denying such until DNA match is offered. Until then? I'm simply an elf.
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