Deleted
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Post by Deleted on Aug 5, 2017 11:31:41 GMT -5
Or you could get the proper Machine and not think about it at all.
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Post by Jugglerguy on Aug 5, 2017 11:39:25 GMT -5
Or you could get the proper Machine and not think about it at all. @shotgunner, I spent about an hour watching Highland Park videos. They have quite a sphere making operation going in China. The videos were really fun to watch. Do you have a Highland Park machine? They make a core cutter similar to yours, but quite a bit more expensive than I imagine yours costing.
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Post by Deleted on Aug 5, 2017 11:40:46 GMT -5
JugglerguyRob, no I have two Richardson's ranch and one homemade RR clone.
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notjustone
spending too much on rocks
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Post by notjustone on Aug 5, 2017 11:49:21 GMT -5
Or you could get the proper Machine and not think about it at all. or you could go 1 step farther and just buy the spheres someone else made. if you just want a couple spheres to have around the house that would be the cheapest route. but then you wouldn't be able to say you did it. believe it or not for a lot of people here its just a hobby we will never even make our investment back on.
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Post by Deleted on Aug 5, 2017 11:55:50 GMT -5
Or you could get the proper Machine and not think about it at all. or you could go 1 step farther and just buy the spheres someone else made. if you just want a couple spheres to have around the house that would be the cheapest route. but then you wouldn't be able to say you did it. believe it or not for a lot of people here its just a hobby we will never even make our investment back on. I believe it! I live it!
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notjustone
spending too much on rocks
Member since January 2017
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Post by notjustone on Aug 5, 2017 12:05:01 GMT -5
I got my bead idea from a woodworking video. I made plywood laps for my flat lap using the same method on my table saw. I just went searching for ideas on YouTube. I swear I once saw a video of making a sphere on a table saw. I think the saw had a board above it with a hole in the board. The wooden cube was inserted into the hole and moved around so that all the parts that could reach the blade were removed. The finished ball will not fit through the hole, but will set in the hole with the bottom just touching the blade. Does that make sense. I haven't been able to find the video yet. very similar to the 3rd video where you see him using the band saw to rough it out he never has to adjust his socket. notice as he knocks off his corners of the cube theres no precision at all. cause he knows as hes roughing it he just keeps knocking off the high spots but distance to blade never changes. even as ball gets smaller and drops farther and farther into the socket.
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notjustone
spending too much on rocks
Member since January 2017
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Post by notjustone on Aug 5, 2017 12:11:53 GMT -5
or you could go 1 step farther and just buy the spheres someone else made. if you just want a couple spheres to have around the house that would be the cheapest route. but then you wouldn't be able to say you did it. believe it or not for a lot of people here its just a hobby we will never even make our investment back on. I believe it! I live it! well then your hobby budget is much larger than mine. lol. I find it interesting to find ways to do things thinking outside the box.
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jamesp
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Post by jamesp on Aug 5, 2017 12:23:11 GMT -5
It is an iteration type process. Best if you had the socket on screw that could be lowered incrementally. I feel my crude spheres could have been dialed to a very accurate radius if I had a smooth plastic socket with a simple height adjustment. All you need is a fixed distance for the final grind. I would not change the hole, I would reduce the height gradually. pauls had his sphere within .002 inches using a divot in a board. I feel very confident this will work. you would have to raise height as you progress because as the sphere gets smaller it would drop farther in the socket which would make it cut deeper on its own, Interesting. But sphere is also getting smaller so further from blade ? Food for thought. Maybe they equal each other - sphere getting smaller and sinking in hole vs. getting smaller and further from blade. Where is the mathematician ? I will say that the spheres I made on the red butcher block were fun and fast because I could barely press down on the top of the sphere and the blade friction rotated/spun the sphere. But only when the rock was close to spherical... Sphere driven by friction of blade at a fast speed depending on down pressure making random and mixed rotations. Crazy cool way of grinding a sphere. It was back in 2014, memory coming back, and I remember being freaked out by the blade driving the sphere. But my socket was not very circular in shape, it had play. I cut the hole crudely with an angle grinder. I am not wrestling with a sphere machine, too many moving parts and too much maintenance and expense. Yes they work, but me a firm believer that there is more than one way to skin a cat, and often an easier way. For spheres larger than 3 or 4 inches get a sphere machine. I think smaller spheres can be spit out quickly using a socket and blade cheaply. I have some experience with this method and feel confident.
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jamesp
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Post by jamesp on Aug 5, 2017 12:32:32 GMT -5
well then your hobby budget is much larger than mine. lol. I find it interesting to find ways to do things thinking outside the box. Exactly. And the intro to a sphere machine in this thread is a southerly movement. Hoping to keep it headed in an alternate process. Created juices, etc.
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Deleted
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Post by Deleted on Aug 5, 2017 13:14:05 GMT -5
well then your hobby budget is much larger than mine. lol. I find it interesting to find ways to do things thinking outside the box. Exactly. And the intro to a sphere machine in this thread is a southerly movement. Hoping to keep it headed in an alternate process. Created juices, etc. Apologies ETA I have less than $3000 in all my equipment. Acquired over 7 years. Not a huge budget. Most expensive piece was the hydraulic feed 18" saw.
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Post by Jugglerguy on Aug 5, 2017 20:46:19 GMT -5
Here's another video by the guy who did video #3. He has a bunch of methods shown for making wooden spheres on his YouTube channel. This method is like the video #4 method. I might go try the band saw method with my trim saw though.
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jamesp
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Post by jamesp on Aug 6, 2017 6:00:50 GMT -5
Here's another video by the guy who did video #3. He has a bunch of methods shown for making wooden spheres on his YouTube channel. This method is like the video #4 method. I might go try the band saw method with my trim saw though. Oh yea, not one dang reason why this won't work with a rock. And it really does not matter what type of cutter you have under the hole. Rotating(stiff) saw blade, core drill, shaper bit, diamond cup, tuck wheel - whatever. Looking at the hole size.... notjustone, note this guy never changed the height of his socket. If the hole is 1/3 the diameter of the sphere... the sphere will not sink into the hole near as fast as material is removed. If the hole is say 3/4 the diameter of the sphere then the sphere is going to drop into the hole much more as material is removed. So the relationship between the hole size and the sphere will have a big effect on the process. In you video Rob it looks like the hole size is about 60% of the finished sphere size. I must say, that is a similar process that worked well on the unakite spheres. But I skipped the cube and freehanded the near sphere shape because the pebbles you sent were close to round. Again, the Great Lakes cobbles are often close to round. You are fortunate if you decided to make spheres. There is a massive river flowing into the Pacific at the boundary of Costa Rica and Panama near San Isidros Costa Rica. It too has round boulders to 8 feet for some reason. The Native people even made their own spheres to mimic the river boulders. Scientists to this day have no idea how they got them so accurate. yes-cool-dude.blogspot.com/2014/04/mystery-of-round-rocks-in-costa-rica.html
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notjustone
spending too much on rocks
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Post by notjustone on Aug 6, 2017 7:38:34 GMT -5
Here's another video by the guy who did video #3. He has a bunch of methods shown for making wooden spheres on his YouTube channel. This method is like the video #4 method. I might go try the band saw method with my trim saw though. Oh yea, not one dang reason why this won't work with a rock. And it really does not matter what type of cutter you have under the hole. Rotating(stiff) saw blade, core drill, shaper bit, diamond cup, tuck wheel - whatever. Looking at the hole size.... notjustone , note this guy never changed the height of his socket. If the hole is 1/3 the diameter of the sphere... the sphere will not sink into the hole near as fast as material is removed. If the hole is say 3/4 the diameter of the sphere then the sphere is going to drop into the hole much more as material is removed. So the relationship between the hole size and the sphere will have a big effect on the process. In you video Rob it looks like the hole size is about 60% of the finished sphere size. I must say, that is a similar process that worked well on the unakite spheres. But I skipped the cube and freehanded the near sphere shape because the pebbles you sent were close to round. Again, the Great Lakes cobbles are often close to round. You are fortunate if you decided to make spheres. There is a massive river flowing into the Pacific at the boundary of Costa Rica and Panama near San Isidros Costa Rica. It too has round boulders to 8 feet for some reason. The Native people even made their own spheres to mimic the river boulders. Scientists to this day have no idea how they got them so accurate. yes-cool-dude.blogspot.com/2014/04/mystery-of-round-rocks-in-costa-rica.htmlyep smaller size sure looks like it keeps it from dropping into socket as much. its hard to see but I think he raised the bit. in the beginning of video you can hardly see the bit down in the hole. look at where the cube is making contact with the socket on the edges of the cube. notice its hitting the same edges for several passes and they aren't getting reduced so bit must be coming up. its a router table he can move that bit up or down from underneath. still can be done but your fixture would have to go up or down since most tile saws have no up and down adjustment on the blade.
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jamesp
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Post by jamesp on Aug 6, 2017 8:24:30 GMT -5
Oh yea, not one dang reason why this won't work with a rock. And it really does not matter what type of cutter you have under the hole. Rotating(stiff) saw blade, core drill, shaper bit, diamond cup, tuck wheel - whatever. Looking at the hole size.... notjustone , note this guy never changed the height of his socket. If the hole is 1/3 the diameter of the sphere... the sphere will not sink into the hole near as fast as material is removed. If the hole is say 3/4 the diameter of the sphere then the sphere is going to drop into the hole much more as material is removed. So the relationship between the hole size and the sphere will have a big effect on the process. In you video Rob it looks like the hole size is about 60% of the finished sphere size. I must say, that is a similar process that worked well on the unakite spheres. But I skipped the cube and freehanded the near sphere shape because the pebbles you sent were close to round. Again, the Great Lakes cobbles are often close to round. You are fortunate if you decided to make spheres. There is a massive river flowing into the Pacific at the boundary of Costa Rica and Panama near San Isidros Costa Rica. It too has round boulders to 8 feet for some reason. The Native people even made their own spheres to mimic the river boulders. Scientists to this day have no idea how they got them so accurate. yes-cool-dude.blogspot.com/2014/04/mystery-of-round-rocks-in-costa-rica.htmlyep smaller size sure looks like it keeps it from dropping into socket as much. its hard to see but I think he raised the bit. in the beginning of video you can hardly see the bit down in the hole. look at where the cube is making contact with the socket on the edges of the cube. notice its hitting the same edges for several passes and they aren't getting reduced so bit must be coming up. its a router table he can move that bit up or down from underneath. still can be done but your fixture would have to go up or down since most tile saws have no up and down adjustment on the blade. Never thought about the router bit height. It does not seem possible to not require height adjustments. Has to be. You would think that it is paramount to have an easy height adjustment, Especially with stubborn-to-grind rocks.
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Post by manofglass on Aug 6, 2017 12:04:16 GMT -5
I did this one walt
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notjustone
spending too much on rocks
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Post by notjustone on Aug 6, 2017 13:06:24 GMT -5
I did this one walt cool what did you use?
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jamesp
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Post by jamesp on Aug 6, 2017 13:11:30 GMT -5
I did this one walt cool what did you use? Tell it Walt. Did you freehand it ?
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notjustone
spending too much on rocks
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Post by notjustone on Aug 6, 2017 13:41:01 GMT -5
I have a few I freehanded on the stacked blade grinder in the tumbler right now.
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Post by manofglass on Aug 6, 2017 15:51:42 GMT -5
Just kept putting it back in the tumbler Tell it got round
Walt
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jamesp
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Post by jamesp on Aug 6, 2017 17:10:43 GMT -5
I have a few I freehanded on the stacked blade grinder in the tumbler right now. What type of rock ?
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