I am trying to cut an arch in 2x lumber. (not too steep, about 4" rise over 2' and back down again)
I haven't used a jigsaw a lot, especially curved work that has to look good. I believe I have a good tool, but not sure if blade selection is right - just using a DeWalt wood balde about a 1/4 wide.
I find that I can't stay with the line, and maybe this is just a matter of practice - but when you wander even a little it shows. Also the blade would bend some and make the cut edge out of plane. Sanding makes it a lot better, but still not satisfactory as finish work.
I tried making a jig plate for my router and mounting it to a board to swing a radius (radius needed is 73 1/2 inches, with a 4' swing) (I knew I was going to need to make several passes,increasing the depth each pass), but I abandoned that method as the jig was not firm enough and it did not cut a crisp radius.
Next I used the same board against my jigsaw foot, and followed the jigsaw with the board as I swung the radius. This did ok on my trial 3/8 plywood, but when I tried on my 2x the blade would bend - as it did when free handing 2x material, only worse.
your advice will be greatly appriciated. these problems are really frustrating !!