This is a first test of a Scarf-joint jig I built this afternoon. Thanks to everyone who has posted a similar picture. The ideas I get on this forum really help. It looks like this jig is working the way I had hoped. And, best of all, building this jig did not require a single trip to the lumber store.
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The plywood is cut at 90 degrees on the side facing the blade. However the plywood is turned 11 degrees to point into the blade. I used a cheap protractor when making this alignment just before screwing in the wooden guide on the bottom. There is a slight 11-degree cut into the 1x3 face of the sled, but this was made after the sled was built. I ran the sled through the saw blade. I hope this helps. Sometimes it is easier to show than tell someone how you built something. The angle cut in the ply opposite the blade I did after construction by running the sled through the saw blade using the other miter slot just to cut off what I saw as waste. I guess the key isn't cutting plywood at an angle, but screwing on the wooden guide on bottom at an an angle.
I can see how you built it , that was not the question , at what angle did you cut the ply to get the 11 degree angle of the scarf cut ?, or give me the link to where you got the idea from .
I tried to avoid complicated measurements when building this jig. I cut a piece of wood for the guide bar about 3/4 x3/8 and longer than I needed. I tested the fit to be tight in my saw. This wood guide bar was set aside, and the sled was built with all 90-degree angles. The plywood started out about 16x9, but got trimmed a little in width as I built the sled. Only after the 1x3x16 face, and the 2x4 braces were attached to the plywood base was it attached to the wooden guide bar. I placed the wooden guide bar in the miter-gauge slot on the saw, placed the rest of the sled on top and positioned it at the proper angle and distance from the raised blade. When I was happy with the position, I slid the pieces to the edge of the saw where I could get a clamp on them. I then flipped the pieces over and countersunk some screws into the guide bar. I cut the extra length of the guide off after it was screwed in place. I used screws, but not glue on the wooden guide in case it ever needs to be moved for a different angle.
This is great. I was working on the same thing this afternoon and having problems with the clamps getting in the way. I was working on the other side of the blade with a smaller layout of the jig. Going to try again tomorrow with your setup.
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Great link that , loads of stuff on there thanks .
I looked at a number of pictures online before building this jig. The jig I liked best was for cutting scarf joints for boat construction. That jig can be found here http://www.woodworkingtalk.com/f27/show-your-table-saw-jig-9968/
The plywood is cut at 90 degrees on the side facing the blade. However the plywood is turned 11 degrees to point into the blade. I used a cheap protractor when making this alignment just before screwing in the wooden guide on the bottom. There is a slight 11-degree cut into the 1x3 face of the sled, but this was made after the sled was built. I ran the sled through the saw blade. I hope this helps. Sometimes it is easier to show than tell someone how you built something. The angle cut in the ply opposite the blade I did after construction by running the sled through the saw blade using the other miter slot just to cut off what I saw as waste. I guess the key isn't cutting plywood at an angle, but screwing on the wooden guide on bottom at an an angle.
I can see how you built it , that was not the question , at what angle did you cut the ply to get the 11 degree angle of the scarf cut ?, or give me the link to where you got the idea from .
I tried to avoid complicated measurements when building this jig. I cut a piece of wood for the guide bar about 3/4 x3/8 and longer than I needed. I tested the fit to be tight in my saw. This wood guide bar was set aside, and the sled was built with all 90-degree angles. The plywood started out about 16x9, but got trimmed a little in width as I built the sled. Only after the 1x3x16 face, and the 2x4 braces were attached to the plywood base was it attached to the wooden guide bar. I placed the wooden guide bar in the miter-gauge slot on the saw, placed the rest of the sled on top and positioned it at the proper angle and distance from the raised blade. When I was happy with the position, I slid the pieces to the edge of the saw where I could get a clamp on them. I then flipped the pieces over and countersunk some screws into the guide bar. I cut the extra length of the guide off after it was screwed in place. I used screws, but not glue on the wooden guide in case it ever needs to be moved for a different angle.
Thanks , but what angle do you cut the timber to make the jig ?
This set up cuts an 11-degree angle.
Great work , so what's the angle on the sliding jig ?
This is great. I was working on the same thing this afternoon and having problems with the clamps getting in the way. I was working on the other side of the blade with a smaller layout of the jig. Going to try again tomorrow with your setup.
That's awesome. Im going to build one of those. Thanks for sharing the pic.