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Peter Rand posted a multicenter,dual curvature form in the gallery, i think i understand how to do the outside, could yall enlighten me on how to hollow a multicenter,dual curvature form. i would receive it as a wonderful xmas gift!
Most of the ones I've seen were hollowed on just one center but if the hole is large enough sometimes you can hollow on both centers. The piece I did had sort of a double tenon. In other words I mounted it between centers and turned part of it and then turned a tenon.
Then I shifted the centers and turned another part of the form and turned a place for the chuck on the existing tenon. This gave me 2 different places to mount the chuck. Then I simply mounted piece on the chuck and hollowed through the first hole. Remounted and reached through the first hole and hollowed some more.
You are severely limited in how much you can turn on the second center.
Another way to do it is more involved. You hollow part of it through the bottom and the other part through the top. This requires some serious planning on how to hold it for each half.
thanks and merry xmas to you John, both options will be tried, Peter used mulberry which the grain pattern is to me like ash or sasafrass, are these types of wood better to use than others? the dye highlighted the grain change in wood
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