jamesp
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Member since October 2012
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Post by jamesp on Sept 26, 2014 12:12:40 GMT -5
When I changed the pulleys to increased the speed the whole thing walked across the floor till you sat on it. with the straight bolt it stays put. You could hold your teeth close together and they would chatter, to give an idea.
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Deleted
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Post by Deleted on Sept 26, 2014 12:57:42 GMT -5
This is me being humble. Walk the walk and all that... and For the record. I do not claim the invention. Nor any other lapidary related equipment.
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jamesp
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Member since October 2012
Posts: 36,155
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Post by jamesp on Sept 26, 2014 14:04:53 GMT -5
Ready for video. If I can figure out how to youtubeicize and Macicize it. Just ground 3 corals. Very nice. Poetic. Charging vid cam. Maybe it will dust the lens. Will try not to talk since sub-titles would be necessary. Don't want to strain the westerner's ears. And the northerners. And the centralers. and so on
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Deleted
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Post by Deleted on Sept 26, 2014 18:29:45 GMT -5
use the vidcam in your phone and the youtube app to upload it to your google account..............
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jamesp
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Member since October 2012
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Post by jamesp on Sept 26, 2014 18:59:43 GMT -5
use the vidcam in your phone and the youtube app to upload it to your google account.............. I only have a Trac phone. I did a 23 minute video and made 16 six inch spheres just kidding. I went to flickr and uploaded the video as if a photo to flickr. Flickr says it is 'processing video' on 'Your Photostream' page. I think I did this before. I could not load the video from the Mac 'iPhoto' directly to Youtube. Youtube was not happy w/the format. If I get it loaded to flickr then it should transfer to Youtube. The video is great illustration of what the machine will do. It turned out fine.
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jamesp
Cave Dweller
Member since October 2012
Posts: 36,155
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Post by jamesp on Sept 26, 2014 19:20:09 GMT -5
Having trouble moving video out of Mac's iPhoto.
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jamesp
Cave Dweller
Member since October 2012
Posts: 36,155
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Post by jamesp on Sept 27, 2014 10:54:51 GMT -5
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Post by captbob on Sept 27, 2014 11:07:37 GMT -5
WOW !!! That thing really eats some rock.
You slip with that thing and we're talking hospital run. Looks like you still have all the ends on your thumbs & fingers best I can tell.
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jamesp
Cave Dweller
Member since October 2012
Posts: 36,155
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Post by jamesp on Sept 27, 2014 11:12:18 GMT -5
WOW !!! That thing really eats some rock. You slip with that thing and we're talking hospital run. Looks like you still have all the ends on your thumbs & fingers best I can tell. I have slipped a few times. Never drew blood, but thinned the skin. Not near as aggressive to skin as it is rock. Need to screw the wheel down lower for better control. Just a quicky preview. Still a bit raw and guards need to be figured.
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Post by captbob on Sept 27, 2014 11:15:25 GMT -5
What kinda guards? Seems like a guard might direct flying shards back at you. Please post pictures when you do the guards so I can understand what you mean.
I love that thing!
< adding to The List >
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jamesp
Cave Dweller
Member since October 2012
Posts: 36,155
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Post by jamesp on Sept 27, 2014 11:39:04 GMT -5
What kinda guards? Seems like a guard might direct flying shards back at you. Please post pictures when you do the guards so I can understand what you mean. I love that thing! < adding to The List > Been using diamond cups for many years captbob. Fingers look closer due to angle, but still close. With bottom of hands resting on table accidental slips much more controlled. But grinding small things is always dangerous. With wood bottom various safety measures can easily be toyed with. Will keep mods updated. Turning pretty slow for video, double the speed not a problem. 1000-6000 RPM with variable control would be best. Shaft pulley a bit loose so it is out of round. Will shim till concentric. It is early in set-up. At those speeds everything needs to be straight and lined up.
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quartz
Cave Dweller
breakin' rocks in the hot sun
Member since February 2010
Posts: 3,341
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Post by quartz on Sept 27, 2014 11:48:38 GMT -5
Man, that thing really chews the material, nice build. Reminds me of an old time shaving horse brought up to modern day rock grinding capability. Thanks for the video.
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Post by braders on Sept 27, 2014 21:55:43 GMT -5
Love it !! and being upright like that looks much more comfy then on angle ill be changing my ideas now ha ha thanks Mr.
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jamesp
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Member since October 2012
Posts: 36,155
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Post by jamesp on Sept 27, 2014 22:08:57 GMT -5
Love it !! and being upright like that looks much more comfy then on angle ill be changing my ideas now ha ha thanks Mr. Got a vertical one and dislike it. The hand position gives needed leverage. Pushing hard on the rock, you would think it would wear the wheel out quick. That is some wear resistant material.
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Post by braders on Sept 27, 2014 22:11:20 GMT -5
Ohh no them wheels meant for men ha ha last long time !! Should see the floor grinder ones ....nasty !!!
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jamesp
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Member since October 2012
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Post by jamesp on Sept 28, 2014 7:35:01 GMT -5
Ohh no them wheels meant for men ha ha last long time !! Should see the floor grinder ones ....nasty !!! No doubt, they are made to take it. That wheel does not even heat up. The new diamond cups are made w/aluminum to dissipate heat. Because they see much heavier use than sticking an agate to it. They are designed to do 12,000 RPM on a powerful angle grinder cutting quartz rich granite with a man bearing down hard on the tool and no water. The trick is in the sintering compound that holds the diamonds. That was dense coral in the video. It is the rock I tumble, and it takes forever to round in the rotary tumbler. I go thru 30/60 grit like crazy and it gets expensive, electricity too. So 4 hours to pre-grind a 16 pound tumbler load suits me. Tumbles look better too.
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jamesp
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Member since October 2012
Posts: 36,155
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Post by jamesp on Oct 1, 2014 9:46:49 GMT -5
In the saddle for 40 minutes. And added a dust cover. Need full coverage. Open motor sucks dust through internal cooling fan.
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Deleted
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Post by Deleted on Oct 1, 2014 10:17:56 GMT -5
need a half horse - then it wont bog on the heavy cuts! That is indeed a rock eater. What are you sitting on? Have you a full work station now, or just winging it with a bucket? Would water drip help? Ear protection simply must be required.
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vugs
starting to spend too much on rocks
Rockbiter
Member since February 2014
Posts: 225
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Post by vugs on Oct 1, 2014 10:40:11 GMT -5
That would make a decent sphere preformer. James im always impressed by the simplicity and ingenuity of your designs.
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jamesp
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Member since October 2012
Posts: 36,155
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Post by jamesp on Oct 1, 2014 10:55:38 GMT -5
need a half horse - then it wont bog on the heavy cuts! That is indeed a rock eater. What are you sitting on? Have you a full work station now, or just winging it with a bucket? Would water drip help? Ear protection simply must be required. Happy with the 1/4 HP. It is enough to cut plenty fast. Sitting on the wood box with a boat cushion. Not that noisy, surprisingly. Grinding metal w/angle grinder way louder. Water drip. Really, the thing cuts so fast but shoots the dust to the right efficiently. Remote fan totally moves the dust. The water slings 360 degrees. You would most likely be concreted in place with mud. And the very place you need hand access is exactly where a guard interferes. I feel very safe with rocks over 1 inch. Below that is finger burner. I have burned skin with small rocks, but never bled. 2 inch rocks and larger are very safe. However, you have a clothes grabber in front of you so caution first and foremost. Nothing compared in terms of danger as a chain saw. No where near it. Getting ready to put it in the greenhouse on the fan end so I can turn on the fan whilst grinding and the fan will suck the dust away. The dust is 1/2" thick on floor slab just from this morning. Must sweep it away while dry or it forms concrete. If you saw the ahapes of those rocks before starting you would be surprised how much material was demoved. But you know that game from making spheres. Needs to be run in the grass or on gravel to eliminate clean up. It does not play on obsidian, glass, marble, granite, unakite, heat treated coral. The not heat treated coral is slower, like the yellow one in the photo above. I love this thing. Guards present a problem with nip points. I prefer a cut than a snatched off finger. Tinkered w/guards and did not see a solution. Motor will have bearing failure if not sealed from rock dust.
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