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Building a 3 head sphere machine.

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Author Topic: Building a 3 head sphere machine.  (Read 2353 times)
jakesrocks
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« Reply #15 on: July 03, 2013, 10:39:49 am »

Daniel, the littl machine will make spheres from 1/4 inch up to about 1-1/2 inch in diameter.

All of the motors turn in the same direction. They create a random spinning action to the piece being turned.
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« Reply #16 on: July 03, 2013, 11:11:56 am »

Daniel, the littl machine will make spheres from 1/4 inch up to about 1-1/2 inch in diameter.

All of the motors turn in the same direction. They create a random spinning action to the piece being turned.
... is that mean both two cillinders tip in last machine turn opposite? because if all motors turn same direction and they put face to face like that so those cillinders tips must be opposite turning. Rpm on videos looks slow to me and all standard motors used to has 1440 rpm, and i think if that little machine turning at 1440 rpm the sphere will possibly dashed like a bullet.... dunno
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« Reply #17 on: July 03, 2013, 11:36:35 am »

Daniel, both motors on the small machine and the 3 motors on the machine I'm building turn clockwise. Since they're opposite each other, it would appear that they turn opposite directions.

They for the most part use motors with reduction gearing attached directly to them. However I have seen some home made machines that use pulleys to achieve the low speed needed. My little machine uses both. It has the gear reduction boxes on the motors, a small pulley on each motor and a large pulley on each spindle.

I'm not sure what the shaft speed of my small machine is, but the machine I'm building has a speed of 106 RPM's out of the gear boxes. It will directly turn the cutters, without additional pulleys.

The motors I'm using on the new machine are surplus parts from old Xerox copy machines. They are getting hard to find, so I bought 5 of them so I would have spares if needed.
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« Reply #18 on: July 03, 2013, 03:37:50 pm »

older sewing machings used round belts
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jakesrocks
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« Reply #19 on: July 03, 2013, 04:56:22 pm »

My broken belts measure 14" long and 3/16" diameter. The local sewing machine repair shop wasn't able to find replacements.
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« Reply #20 on: July 03, 2013, 06:41:20 pm »

I love spheres!  I wish I had a sphere making machine to make them.  Might have to be my next project!
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jakesrocks
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« Reply #21 on: July 03, 2013, 06:45:58 pm »

They aren't that hard to build. You may have a problem finding the motors though. If you decide to build one, you can PM me with any questions. I'm always happy to help a fellow rocker.
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« Reply #22 on: July 03, 2013, 09:09:55 pm »

Thank you very much Don...you are awsome friend, can i see what smaller cutters part looks like from the front/inside it?
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« Reply #23 on: July 03, 2013, 09:21:25 pm »

It's in the basement right now. I'll take some pics tomorrow. Almost bed time over here.
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« Reply #24 on: July 03, 2013, 09:29:38 pm »

No problem Don, have a good rest....thank you yes
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« Reply #25 on: July 03, 2013, 09:41:36 pm »

Oh what the heck. One pic tonight. If you want more, I'll take them tomorrow.

The cutters are made of brass. As you can see, they're tapered to the inside on one end. A threaded center hole runs through the middle, and the heads just screw on to the spindles. These are 4 of the 5 sets of heads. The largest heads are on the machine.

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« Reply #26 on: July 03, 2013, 10:41:45 pm »

Oo....You don't need to do that...thank you so much Don, so kind you are. Now i know those cutters need a coarse sic grid to cut and polish with those cutters too with one of polishing powder like tin oxide, cerium oxide or any yippie.
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« Reply #27 on: July 03, 2013, 10:59:20 pm »

Daniel, the cutters must be taken off the machine and cleaned very good when changing grits. When I get to the polishing stage, I fasten a piece of soft leather over each head with a piece of wire. The leather will hold the polish and give a very good polish.

And now I'm off to bed. LOL
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« Reply #28 on: July 03, 2013, 11:24:53 pm »

Have a good rest Don..... yes
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« Reply #29 on: July 03, 2013, 11:30:00 pm »

This is wonderful Don!!!!!  You know I am completely oblivious to spheres...... but......gosh I want to make one some day!!!!!!

You make things look so much easier than they are!!!!!
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