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I had a problem similar to yours using a table saw with a jig. I kept getting an angled cut. I double checked all my settings and everything seemed accurate. I finally determined that the thin kerf blade on the table saw was a little dull and was flexing during the cut. I switched to a new, stiffer blade and it worked perfectly after that.
Bob

If all else fails, check Kinkeade's method of a stacked neck...no scarf joint...he stacks the head end as well as the heel...if you are careful matching the grain it'll look great.

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[QUOTE=crazymanmichael] and when i built the jig, it took me far less time to build than it did to do a joint with the plane, and it hangs on the wall, always ready to do its thing again whenever i need, with no relearning curve to negotiate. [/QUOTE]

Well, inspired by Michaels advise, and because I love hanging stuff on the wall because it makes me look like I know what I am doing, I went ahead and built me one of them scarf cutting jigs....




Too easy! The most time consuming part was shaping a handle from scrap Jarrah. I just used what was at hand, I had some 1/2" marine ply with a nice teak veneer laying around so that choice was made. The glue blocks supporting the fence came from the same piece as the handle was fashioned from and were left larger than needed to compensate for the thickness downsize of the ply.



The sled runner was fashioned from an old cutting board (which mysteriously disappeared from the kitchen quite a while ago) a quick coat of shellac and she is ready to hang on the wall

Cheers all

Kim   

well kim, by now you should have a couple of scarf joints cut, glued and cleaned up! let's have an after action report on your jig?

What! Take the jig back down from the wall?? Surely you jest??? Make dust in my shop!!! No, No, No! For goodness sake man get a grip! Kolonel Kragenbrink of the Klean Korps would simply not hear of it (Sorry Lance)

Michael, I will post picks when the new blade arrives, the 9 1/4" mounted on the old Gilbro saw will just not cut it so to speak.

Cheers

Kim

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OK here’s an update. I took care of the taper problem by doing a better "setup" on my bandsaw and I modified my jog from something like this.



To something more like this. These are very rough diagrams so take them as such.



Also a couple of hours learning how to use the plan real helps. The joint looks good now with exception of where the headstock meets the neck in the back. I have some ugly glue there that I have not figured out what to do with and the edge of the scarf is ragged and looks ugly. But most of the problems solved! Thanks guys.