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Post by oregon on Nov 24, 2019 16:59:44 GMT -5
They operate at 30in-lb, but I don't know if that is before or after the 17/1 reduction. I suspect before because they are torquey as heck. I like the idea of a direct drive sphere machine
I keep thinking about these robotics components several folks sell, Example with rugged planetary gear box motors that have torque specs as good as the old Xerox motors... DC would be trivial to control the speed... the link above has 117rpm 960 oz-in, or 223 rpm 530 oz-in motors...
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Post by oregon on Nov 24, 2019 0:42:05 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. I thought I was doing well with my 2A 1/12 water circulation motor... (only run 2 15lb barrels)
lets see a 1 Amp motor would save me an amp
1A at 120V =120 watts, * 30days*24 hrs /1000 = ~ 86 kWh /month, @$0.13/kwh = $11 per month to run it, looks like it'd pay for itself in two months... typing and calculation on the fly here, so somethings probably wrong.
running things 24/7 adds up. See plenty of homemade tumblers with +/- 5A motors, always think that seems wasteful.
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Post by oregon on Nov 20, 2019 13:23:28 GMT -5
It hasn’t sat idle for a while. I used it a couple weeks ago and then again just the other day and had this issue. I’ll check everything out and then act accordingly. I did try to spin by hand and it wouldn’t go into full spin mode. Thanks for your suggestions! given that I'd have to go with the dead motor camp - does the shaft spin freely when it's not powered on? that'd rule out the bearing/bushing.
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Post by oregon on Nov 19, 2019 21:45:13 GMT -5
Ah yeah those are them, remind us of the outcome of your home made Vibrasonic?
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Post by oregon on Nov 19, 2019 14:27:28 GMT -5
The adjustable counter weights are adjusted to near minimum 'off balance' for these small hoppers. For the larger 35 pound hopper the 'off balance' is increased substantially to shake the extra weight so says the Vibrasonic instructions. I searched but can't seem to find a post of yours a long while back that shows the guts of the vibrasonic and how they're set up? Belt to a counter-shaft with offset weights rather than directly on motor? Is the counter shaft attached to the plate then that's supported by springs? just curious. Or just a link to those pics/post if you have better luck than me finding it.
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Post by oregon on Nov 18, 2019 21:15:04 GMT -5
Have had Lot-O for years now without having to replace anything. This morning I tried firing ‘er up and she wanted to spin but the fans seemed to just barely spin and then stop. Since the motor fired up could i assume it’s the fans and just replace those or is it a guessing game? Thanks in advance sounds more like the motor isn't spinning, replacing fans wont do anything. probably gunk in the sleeves/bearings after years, esp if it's sat for a while. I'd take the fans off, spray some wd near the shaft (or some of the motors actually have an oiling hole for the sleeve some light machine oil in there (ususally soaks a felt piece near the sleeve.) Try to get it spinning by helping it get started by hand.
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Post by oregon on Nov 16, 2019 15:49:41 GMT -5
A good example of a powerful vibe barely able to rotate the batch due to a heavy sticky sugar slurry and AO 14,000 polish. No bouncy bruises or chattering, glued together tight and putting the serious elbow grease on these glass tumbles. Note the left side has a slower action, it attains polish sooner. Both sides polished in 18 hours after 3 days in vibe w/AO 220. The top layer is where the bruises usually occur and fine end polish gets damaged in a vibe due to bouncing and chattering. The bottom section is where the most weight is and the most grinding pressure is located. And the least bouncing if any(or you will have problems). Hoppers like the Lot-O with a tall hopper are probably the better design for higher and safer grinding forces.(taller than wide). Same sticky game with the 3 day AO 220 run. The grey color is due to the AO 220 wearing a thin layer of steel away from the steel hopper.
Just pondering, but if the viscosity is gluing things together, could the same be achieved by lessening the amplitude of the vibe? f=ma, have to think about how amplitude and acceleration are related in the vibe, how the 'glue' might make the individual rock feel more force from the collection. ie the glue probably also effects the m term?
inelastic,elastic collisions and all that, have to dig out text books, or just follow the lotto recipe
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Post by oregon on Nov 10, 2019 13:49:04 GMT -5
Only one story, no attic or 2nd floor.
so the slab cut out & large wall opening must be for the entrance to the below ground bunker? ie why not a simple rectangular slab?
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Post by oregon on Oct 18, 2019 21:46:13 GMT -5
not a smart phone but....
jamesp had some nice results with the Olympus tough cameras - microscope mode that offers stacked focusing with one button.... he posted a bunch a while back here's one link, but there is more info if you dig around. forum.rocktumblinghobby.com/thread/79665/tg-4-stacked-focus-performance The macro & microscope modes on these cameras is pretty impressive.
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Post by oregon on Oct 15, 2019 18:39:17 GMT -5
Foredom makes a plastic vise that is made for holding things underwater. Might be worth looking at.
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Post by oregon on Oct 10, 2019 11:12:04 GMT -5
Also an interesting read about the Cycad national monument....
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Post by oregon on Oct 10, 2019 11:05:11 GMT -5
Been away all day and I agree it is Cycad - but a section of a female Cycad cone with seeds, rather than wood or bark. I'd not heard of cycad in that area - mostly fossils of more temperate plants. There are layers of the Clarno Formation that go through the area (including Hampton Butte to the south) and Cycads have been found in upper Eocene layer of the Clarno Formation elsewhere. Nice find! I'll attach some better pics. I don't see any of the cone texture, and the piece itself is more like a section from a cylindrical wall rather than a spheriod wall - (ie, it's only curved in one dimension) but it does certainly look like other cone fossils once you start googling... It was a surface find, near the 'site a' part of Dendrite Butte. Thanks for the info.
light is a bit flat this morning, and I'll have to see if I can upload photos after posting, the upload picture button never seems to be present when I reply?!
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Post by oregon on Oct 9, 2019 14:23:46 GMT -5
Just had this Identified as a Cycad Specimen, updated post.
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Post by oregon on Oct 2, 2019 10:50:25 GMT -5
I was going to put the fans on, but discovered they don't fit the shaft. Either Lot-O used different motors with different diameter shafts, or the motor is a replacement. cross posted above, but made me curious, so I have an old gray machine, with nice metal fans that are as straight as the day they were new, and the new plastic fans that have been through a few sets, indeed the old motor had a smaller shaft. You can see on my pic where the spot weld dimple is for the offset weight on the metal fan, not quite the offset weights of yours. (hmm I don't see the cloudinary attach photo button, email me if you want pics)
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Post by oregon on Oct 2, 2019 10:34:37 GMT -5
The new fan has the weight attached to the plastic fan. These seem to be consumable, they usually will warp and it just doesn't seem like a good design to me. Interesting weights on the second machine; that lot-o is the older gray, so maybe they did that originally, attaching the offset weight directly to the motor shaft? I wouldn't use both weights on one machine, but if the action was ok, I'd be tempted to take the weights off the plastic fan and use the others with the fan on the shaft to keep the motor cool. Without the offset weight attached to the plastic, it's shouldn't deform for a long while. 2c.
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Post by oregon on Sept 5, 2019 17:32:31 GMT -5
Casey quit and decided to do something else with his life and John does not have the people to keep it open for digging. the office and rock yard is open. Hope thing get getting the near future!
yeah hopefully it sorts itself out. Hard to imagine a shop surviving way out there without the digging part but I suppose wholesale or such would work. Thanks, just hard to imagine Richardson's digging being closed permanently....
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Post by oregon on Sept 5, 2019 17:20:00 GMT -5
Dang I haven't heard about Richardson's ranch being closed, can't find any threads, is there a link, or what's the scoop?! woodman
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Post by oregon on Aug 6, 2019 10:40:24 GMT -5
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Post by oregon on Jul 28, 2019 23:28:50 GMT -5
69
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Post by oregon on Jul 24, 2019 11:03:52 GMT -5
As far as the Can Size goes. Any Genus even my Grand Daughter will tell you that a Smaller Can will spin more revolutions than a Larger Dia. Can, Maybe the engineering needed a smaller can .number of revolutions isn't useful measure. Centripetal force is mv^2/r or mrω^2. for the same rpms, the separating force goes up with the square of the radius. I'd wager that they had a hard time building a larger version that wouldn't fail and thus reduced the can size. It's hard to build a large centrifuge, google centrifuge accidents.
Everyone should be made aware of the "new" HP story; buy their products if you feel like supporting them.
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