Timbuck
Well-known member
I was pottering around this afternoon on my new Tenor jig and tidying up the workshop..When Ding! an Idea came into my head on how to make a radius dish on a Pedestal drill...I've seen all sorts of other methods used ( including the two Guys who suspended a router on a 20 foot length of chain from the roof)...Anyway! so I dug out an old 4 1/2 inch sanding disc and made this experimental set up...the workpiece is a disc of MDF I had laying around and I mounted it on a board with a pivot, on the Drilling table tilted the table at 5 degree's and proceeded to rotate the MDF disc by hand and fed the sander into the workpiece...and "waddya know" in a sort of way It worked!...what amazed me was the speed at which the radius was formed....and the finish is spot on.
I haven't done any calculations yet on what is required to produce say a 22 foot Radius..but it make sense that with a 10 inch sanding disc it's possible to produce a 20 inch wide radius dish.
This is just an experiment and it seems to work ok. so now i'll go back to the drawing board and design a better set up with more accurate tooling...Here is a couple of pics so you can fathom out how it works.
I haven't done any calculations yet on what is required to produce say a 22 foot Radius..but it make sense that with a 10 inch sanding disc it's possible to produce a 20 inch wide radius dish.
This is just an experiment and it seems to work ok. so now i'll go back to the drawing board and design a better set up with more accurate tooling...Here is a couple of pics so you can fathom out how it works.
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