john_hartman
03-23-2012, 07:33 AM
I'm running a new PRS Alpha with 2.2 HSD and air drill. The following issue is something that I have been "living with" on my old machine but would like to try get it resolved.
Two issues-
1) When cutting dados I get a ridge along the center-bottom of the dado. Its about 3/32 tall and about 1/16 thick (See attached photo.) This is the case when using .5" ply and using a .25" compression bit. I would simply like the bit to make more than two passes. Apparently the "pocket settings" with step-over values has no affect on this. It is controlled by the "dado" settings which just allows you to choose climb or conventional. Plywood is generally around .47 to .48; I have a fit clearance of .015. The math with a .25 should overlap enough to avoid this bit it doesn't. What am I missing? Is there anyway to get multiple passes when cutting dado's?
2) On tenons I get a wavy edge. (See attached photo.) This only occurs where assembly marks are located. If you look closely you can see where the cooresponding holes has a bump right behind it. I'm thinking the when the bit encounters the holes where there is less resistance the bit deflects somehow..? Again this is using a .25" compression bit. Any ideas on a remedy? My thought was to have the holes drilled at the end, but I don't believe that is possible.
Two issues-
1) When cutting dados I get a ridge along the center-bottom of the dado. Its about 3/32 tall and about 1/16 thick (See attached photo.) This is the case when using .5" ply and using a .25" compression bit. I would simply like the bit to make more than two passes. Apparently the "pocket settings" with step-over values has no affect on this. It is controlled by the "dado" settings which just allows you to choose climb or conventional. Plywood is generally around .47 to .48; I have a fit clearance of .015. The math with a .25 should overlap enough to avoid this bit it doesn't. What am I missing? Is there anyway to get multiple passes when cutting dado's?
2) On tenons I get a wavy edge. (See attached photo.) This only occurs where assembly marks are located. If you look closely you can see where the cooresponding holes has a bump right behind it. I'm thinking the when the bit encounters the holes where there is less resistance the bit deflects somehow..? Again this is using a .25" compression bit. Any ideas on a remedy? My thought was to have the holes drilled at the end, but I don't believe that is possible.