OK, this is how I'm making these small square plates.
I'm not saying this is the right way, or the only way, it is just "My" way. If anyone has any suggestions as to how I could improve my method, PLEASE speak up, as I'm still learning how to do this lathe stuff
I'm making fairly small plates here, I understand that this method would not be used for larger plates, but for mine, this works just fine.
The wood is Hard Canadian Maple, and the pieces start out about 7.5 cm (3") square, by about 2.5 cm (1") thick.
I cannot stress how important it is to get the pieces exactly square, if the piece is NOT square, then you will not be able to get the thicknesses the same on all four sides.
I drill a 1 1/8" hole about 1/4" deep on one side of the piece, this will be the top. Again, this hole has to be exactly in the center of the piece, take the time to do this right and it will pay off later on.
Here is the stuff I use; custom built "Jam" chuck, 3" square of wood, masking tape, Nova G3 chuck with the pin jaws.
Here you can see the hole, that the pin jaws go into.
I try very hard to get the piece on the pin jaws square and flat too.........
....... I bring up the tail stock with out a live center in it, to press against the wood, as I expand the pin jaws to hold the piece.
once mounted, I use the bowl gouge, a 3/8" with a traditional grind on it, to make my first cuts, these are roughing cuts, so I'm not that concerned about a smooth surface. I then use the parting tool to make my tenon.
(It is also really important to make sure there is a center dimple in the tenon, as you will need this to remount the piece on the jam chuck)
Now I've done the cutting on the bottom of the piece, I have a tenon and a center dimple, I try to make a small, maybe 1/8" wide flat spot right next to the tenon, so the jaws of the chuck have a flat surface to reference when I turn the piece around. I'll finish the piece here to the point of putting on the sanding sealer after sanding to #400.
OK, now I've flipped the piece around, and am mounting it to the pin jaws. Again I bring up the tailstock minus the live center to press the piece (softly) onto the jaws, sometimes as you tighten down on the tenon, the piece moves a bit, which is not good.
Attachment 14732 Attachment 14733
Just to show you how I cut, I do it in steps, and I cut only about 1/16" at one time, or you WILL break that small tenon off, and bad words will be said
OK, now I've got the inside done.........
....... I sand and finish it to the sanding sealer point........
and take it off the pin jaws, flipping it over and putting the jam chuck on the lathe, then I place a piece of paper towel between the piece and the jam chuck just to keep things from getting scratched etc. I bring the tail stock and live center up, and you can see the center dimple is used here to center the piece on the jamb chuck. I apply VERY light pressure to the bottom, one, I do not want a DEEP dimple, and two, if the curve on the piece does not EXACTLY match the curve on the jam chuck, and you push hard on the live center, you can crack the piece......... DAMHIKT