Bruce Thompson
02-25-2022, 7:19 PM
Making a small travel folding chess set. Each half will be 4 1/2" x 9" playing surface. I used 4/4 walnut and maple for the 4 x 8 square glue-up, then flat sanded both sides. Then I re-sawed into two 3/32" thick halves that will be glued onto a 1/4" Baltic birch ply substrate.
The two "slices" have bowed a little bit, so I think I will have to stick them with double stick tape to a 7" x 24" piece of 5/8 BB ply scrap in order to run through the sander to flatten the halves to a uniform thickness.
I plan to run 120 grit abrasive and take .008" in each of two passes to get down to a final 0.200" thickness. After gluing to the 1/4" BB ply, I would take a final .004" with 180 grit on the drum.
My substrate BB piece has a slight bow in its 24" length, such that when placed on a flat surface it is maybe 3/32" high in the middle, easily pressed flat with one finger; nice and flat across the short dimension. I assume that the leading and trailing rollers of the sander - each 2 1/4" offset from the drum - would flatten the substrate board to the conveyor and give me nice flat work pieces. I would stick a sacrificial piece of stock alongside the workpieces overlapping front and back to prevent any possibility of snipe.
What do you all think? Have I missed anything?
Thanks
The two "slices" have bowed a little bit, so I think I will have to stick them with double stick tape to a 7" x 24" piece of 5/8 BB ply scrap in order to run through the sander to flatten the halves to a uniform thickness.
I plan to run 120 grit abrasive and take .008" in each of two passes to get down to a final 0.200" thickness. After gluing to the 1/4" BB ply, I would take a final .004" with 180 grit on the drum.
My substrate BB piece has a slight bow in its 24" length, such that when placed on a flat surface it is maybe 3/32" high in the middle, easily pressed flat with one finger; nice and flat across the short dimension. I assume that the leading and trailing rollers of the sander - each 2 1/4" offset from the drum - would flatten the substrate board to the conveyor and give me nice flat work pieces. I would stick a sacrificial piece of stock alongside the workpieces overlapping front and back to prevent any possibility of snipe.
What do you all think? Have I missed anything?
Thanks