notjustone
spending too much on rocks
Member since January 2017
Posts: 426
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Post by notjustone on Aug 5, 2017 11:24:14 GMT -5
The belt sander method is seriously flawed. I've been thinking about this and it can't work the way I'd like it to work. My calculation was for a finished sphere. Those dimensions should work for a sphere. If you put a finished sphere over the hole, it should reach the saw blade (or belt sander). However, an unfinished sphere is larger and will not reach the blade. You'd have to start with a much larger hole and gradually decrease the diameter. The question is ,how do you know what to start decreasing the diameter? I'm not sure this is possible. There may be a very good reason that you never read anything about creating spheres this way. in theory you would have to get the blade higher into the socket to get it to fall down into the socket. but as it cuts every time it falls in it gets a little deeper in the socket which makes blade cut again until ball is small enough to fall through. hence the socket next to blade set at 90 degrees doesn't have that problem. as it falls vertically into the socket the distance to blade and depth of cut doesn't change horizontally.
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notjustone
spending too much on rocks
Member since January 2017
Posts: 426
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Post by notjustone on Aug 3, 2017 10:02:11 GMT -5
Think I'll go make my son who still lives upstate to go rock hunting for me. you must really hate him.
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notjustone
spending too much on rocks
Member since January 2017
Posts: 426
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Post by notjustone on Aug 3, 2017 9:07:22 GMT -5
Syracuse gem and mineral society has monthly meetings I know there is at least a couple tumblers in the group as they were doing tumbled stone prizes for one of their fundraisers at gemworld last month. but they meet during the evening on weekdays, I work second shift so haven't been to one.
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notjustone
spending too much on rocks
Member since January 2017
Posts: 426
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Post by notjustone on Aug 3, 2017 8:59:39 GMT -5
unfortunately cny isn't exactly the hotbed of rockhounding. we have done the Herkimer diamonds and garnets in the Adirondacks. but theres just not much else worth collecting tumbling wise.
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notjustone
spending too much on rocks
Member since January 2017
Posts: 426
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Post by notjustone on Aug 2, 2017 23:08:41 GMT -5
I'm just north of Syracuse. work in cuse I work in Cuse too. well solvay actually lol.
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notjustone
spending too much on rocks
Member since January 2017
Posts: 426
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Post by notjustone on Aug 2, 2017 10:47:10 GMT -5
I'm just north of Syracuse. work in cuse
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notjustone
spending too much on rocks
Member since January 2017
Posts: 426
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Post by notjustone on Aug 2, 2017 8:51:22 GMT -5
You may have to move the socket incrementally into the blade as sphere gets closer to round notjustone . The blade hits the sphere any where from 1/2 to 2/3's from the bottom of the sphere. So you are removing material off the side of the sphere. Regardless of where the blade is shaving the sphere, you must advance the socket closer to the blade as material is removed. Similar to the way Jugglerguy is advancing a bead into the saw blade as the cylinder forms and reduces in diameter. Great analogy for 2 dimensions. Sphere is 3 dimensions: yes but even when he advances bead in he is indexing off the center. your socket would be more like if he cut a notch in the board. once it cuts one side the ball is smaller and wont touch blade anymore. just like when you use a rip fence to make a cut then put cut side against fence its not going to cut second side because your already at the size from the first cut. like I said the shallower the cuts the closer you will be able to get to true round. your better bet would be to leave blade 90 degrees to socket clamp fixture so the center of socket is slightly less than diameter of ball from blade. plunge ball into side of blade till it falls into socket then spin horizontally. make a horizontally cut band around rock. turn ball slightly and make another cut repeat repeat repeat. as ball reduces in size and falls into socket it still stays centered same distance. and in contact with blade.
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notjustone
spending too much on rocks
Member since January 2017
Posts: 426
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Post by notjustone on Aug 1, 2017 23:48:21 GMT -5
James. I did much the same as you are thinking with my first sphere. I built a fixed platform that went in front of the grinding wheel, much like a rest, I ground a small indentation in it so the sphere was sitting in it at the right distance and moved the rock around by hand. Very Heath Robinson but it worked, it was 50 years ago and I was 16 at the time. Now that sounds like a plan pauls. THAT is a forward movement. 1 inch butcher block nylon with a partial sphere(socket) cut in it(defined a dome). Low friction, can hold some drip water, allow rotation. Holds it at a constant radius. Rough by hand, final using slick spherical socket. That may be all that is needed. As it is I turn the tile saw table blade at 45 degrees and roll the stone against the tile saw table and the edge of the slanted blade. That serves as a good guide for rough radius grinding. If the table had a spherical socket to serve as a guide I'm certain of perfect spheres. 1.5", 2", 2.5", 3" holes could be cut into nylon butcher block with forstner bit and chamfered by hand with a file to serve as a socket. Best if it could be on an adjustable feed screw and slight fixed adjustments from blade could be made. Made a nearsphere without a socket on the tile saw table by resting the rock on the flat table and rotating by hand against slanted blade. Given that socket in a fixed spot the sphere likely would have been perfect. Make different sockets for different size spheres. Move socket slightly closer to blade as sphere is grinding to a perfect sphere. Keeps it simple. My 3 attempts at making shapes with super shaper tile saw grinder free hand: www.flickr.com/photos/67205364@N06/albums/72157683648790962Don't be fooled by this little tile saw grinder, at 3600 RPM and a dead smooth rotation it is a real Mohs 7 rock eater. Blade very important- 7" Advanta tuck blade, $27 Ebay. Note: Tile saw can be laid down flat and blade bottom kept in water tray. It is the table top that flips up, not the saw blade. Position of saw was ergonomic choice. This would allow adjustment of rock socket from blade: when you cut the top of the sphere would it not reduce diameter and drop farther into the socket as top cut part reaches bottom? then not cut on opposite side. you could probably get close by moving socket closer and removing tiny amounts per pass. but you will always be dropping into the socket with each pass.
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notjustone
spending too much on rocks
Member since January 2017
Posts: 426
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Post by notjustone on Aug 1, 2017 23:03:11 GMT -5
the springs are also longer on the industrial go to the rockshed look at the uv=10 with blue stripe then take link to light duty and check out the shorter springs. www.therockshed.com/tumbler3.html
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notjustone
spending too much on rocks
Member since January 2017
Posts: 426
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Post by notjustone on Jul 31, 2017 22:56:12 GMT -5
I used a rotary to remove the grind marks from pre-grinding. If you shape it well on the pre-grinder it only takes a few days for the rotary to remove the grind marks. The sphere is only as good as you grind it on the pre-grinder. Plain and simple. Rotary does do a good job removing material and grind marks consistently and does not seem to alter the spherical or discoidal's shape if rock has no soft spots. The vibe does not alter the shape, just lays a polish down. Need to go finish the discoidal and the sphere. Tumblers have been shut down. However, with the new tile saw rig I might be able to use a jig to get a realsphere instead of a nearsphere. That tile saw would spit out 2 to 2.5 inch spheres from Mohs 7 cobbles in a jiffy IF I had a jig. Need a machinist( notjustone ). I may be able to handle the building of the jig. It is on the bucket list. it would be like 2 rolling shafts to rotate the rock on as it is held against the diamond wheel. Something like this notjustone that holds the stone and allows a man to rotate the stone by hand against the high speed diamond wheel to get a fixed radius. I'm not a machinist. I'm a machine repair mechanic.
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notjustone
spending too much on rocks
Member since January 2017
Posts: 426
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Post by notjustone on Jul 31, 2017 11:07:32 GMT -5
I'm still waiting to see the nearshere polished.
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notjustone
spending too much on rocks
Member since January 2017
Posts: 426
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Post by notjustone on Jul 31, 2017 10:53:45 GMT -5
yes but not perfect sheres like you get off the shere machines. I call them "nearspheres". but I have been toying with the idea of making a sphere grinder to do rough grind then into tumblers to finish.
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notjustone
spending too much on rocks
Member since January 2017
Posts: 426
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Post by notjustone on Jul 26, 2017 22:39:49 GMT -5
I am ordering a vibe tonight and would think I'll have it in a weeks time. I should be finished with my Ocean Jasper, 3 weeks in course this Saturday. If I'm happy with the shaping can I just keep the rinsed Ocean Jasper in water till my vibe shows up? I want to get started on something else in my rotary, while I wait for the vibe to show up. which vibe did you decide to get?
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notjustone
spending too much on rocks
Member since January 2017
Posts: 426
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Post by notjustone on Jul 26, 2017 22:17:10 GMT -5
omg you 2 are taking over this thread to? lol
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notjustone
spending too much on rocks
Member since January 2017
Posts: 426
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Post by notjustone on Jul 26, 2017 9:51:41 GMT -5
my father in law got me into welding he had 7 old shield arcs. I worked for him for a couple years as a helper. went to night school to learn to weld myself and get my first cert. he must have known I was serious about welding which his 2 boys never had any interest in because, I completed the class close to xmass on xmass morning he said see the 4 welders on trailers pick 1. got myself a bigger truck did a lot of heavy equip type work had some structural certs. aws and dot. them shield arcs would lay a smooth bead 8 10 12 hours a day, day in day out for years only problem was the 200s were 1500 lbs. where as the air cooled rangers bobcats champions weigh in at 500 lbs. don't weld as nice don't last nearly as long but are a fraction of the cost. so you see a lot of them on service trucks but the full time welders will almost always have shield arcs vantage or miller big40s.
bad timing for me just as I was getting in a lot of the big manufacturing plants were closing and every welder in the area was throwing a welder on a truck and lowballing to get into the bizz. father in law puts around for a while making less money each year then decided it was time to retire. wish ide have known he was gonna drop out I probably would have ended up with enough of his clients to stay in the game. but he talked about retiring for years, my list of clients kept dwindling got tired of dropping rate to compete. most clients didn't have cert or liability requirements so went with whoever was cheapest. just 1 day I got tired of not doing anything for fear if you missed that late nght or weekend phone call they would move on and you would lose that client. parked the truck took a pay cut for a nine to five and never looked back.
ps how many grinders did you burn up before you realized the exciter coils produced 110v dc voltage. if you didn't have ac/dc grinders they burnt right up.
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notjustone
spending too much on rocks
Member since January 2017
Posts: 426
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Post by notjustone on Jul 25, 2017 22:48:22 GMT -5
looks like slag glass to me
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notjustone
spending too much on rocks
Member since January 2017
Posts: 426
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Post by notjustone on Jul 25, 2017 22:43:30 GMT -5
jamesp doesn't the weld on the left look like it is cracked?...............................MrP By George it does ! Good eye Michael. It is a bit of a peculiar weld to start with, having a lot of heat to make such a blob. Someone must have had a powerful welder like a 400-500 amp stick unit. Probably on of those old 400 amp Lincoln's with a flat head 4 cylinder. I had one that burnt a quart of oil every 4 hours. Believe it was the old flat head 4 they put in a Willys jeep. Burned oil but burned rods quick too. A beast with that giant generator. most of them old lincolns (shield arcs) 200 amp ran a continental f162 or f163 4 banger and some of the 300s ive owned 3 of the 200 "pipeliners". my sa 300 had a f244 6 cyl conti. if you had one of the ones with the Hercules (willys jeep) it was an oldie. probably 40s or early 50s.
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notjustone
spending too much on rocks
Member since January 2017
Posts: 426
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Post by notjustone on Jul 25, 2017 22:16:30 GMT -5
</div>I would have thought blood stone would have been 1 of the red ones lol. shows what I know.
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notjustone
spending too much on rocks
Member since January 2017
Posts: 426
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Post by notjustone on Jul 25, 2017 7:53:58 GMT -5
box is in loving the moss agate.
hate to highjack your sales thread but box 2 the green rock on left what is it?
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notjustone
spending too much on rocks
Member since January 2017
Posts: 426
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Post by notjustone on Jul 22, 2017 12:56:41 GMT -5
in our foundry 99 percent of the areas an m95 "respirator" is all that is required by osha. and the air quality isn't that great. being in maintenance we go into the other 1 percent areas and have to fit test for "real" respirators every year. remember or respirators to work properly you have to be smooth shaved all the time.
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