Fiddle Jameson: Trimming the margins. Once the ledge for the top and bottom plates is a uniform 4.3 mm then the top and bottom plates are “tacked” glued to the blocks. The rib out line is then used to trim the plate edge margins to 2.5mm. I use the CNC machine to “rough” out the margins. By fastening a guide pin on the CNC table and then positioning the router bit about 5mm from the edge I can move the instrument body against the guide pin to get a uniform edge margin. Once the edge is consistent, I can move the CNC router 1/2 to a 1/10 of a mm towards the body to sneak up on my final measurements. As with the ledge, I bring the CNC within .3 to .5 mm and then finish by hand for those final 1/10ths


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Fiddle Jameson: Trimming the margins. Once the ledge for the top and bottom plates is a uniform 4.3 mm then the top and bottom plates are “tacked” glued to the blocks. The rib out line is then used to trim the plate edge margins to 2.5mm. I use the CNC machine to “rough” out the margins. By fastening a guide pin on the CNC table and then positioning the router bit about 5mm from the edge I can move the instrument body against the guide pin to get a uniform edge margin. Once the edge is consistent, I can move the CNC router 1/2 to a 1/10 of a mm towards the body to sneak up on my final measurements. As with the ledge, I bring the CNC within .3 to .5 mm and then finish by hand for those final 1/10ths. .
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