Dear Cyril.
In engineering there are many ways to " skin " the proverbial! I have worked out a plan to create a large diameter plastic disc without a lathe.
I'm intending to use those 2" Brass balls, of which I have many. My intention is to " press fit " them around the edge, my PCD being an 1,1/4" less than the OD.
What would be the ideal separation distance between one ball and the next?
Kind regards, Graham.
Dear Graham, For cutting large discs I use a radius arm attached to my router and use a fine point vee bit, then cut both sides about halfway through the material. Sometimes I experiment with the speed of the router so I don't get melting. I'm sure you have done this in the past, I'm just thinking out loud. Also cutting a small circular groove to accept the edge of the hemi-spheres where the they are to be bolted will keep them from walking under high speed. If this is done on each side of the disc it should be very rigid. I'm a little fuzzy on what is needed here. I imagine a large sphere will have more capacitance and more of a surface effect that cannot be obtained by just using doorknob capacitors inside smaller spheres for more capacitance. Or is this thinking wrong? Kind regards ION
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