Longcruise, one method I use is to put it in a vise, back facing up, string side down. Level it as precisely as possible. I use a little machinist level, but any good level will do.
Then stretch a weighted string from one end to the other, centered on the ends of the blank, and 'drop plumb lines down' from the string to find the center of the handle area, and various places along the limbs. A few more marks are generally beneficial in the area with the most recurve.
Instead of an actual plumb bob, I've found it easier to use a good combination square with a level in it to mark the limb center directly below/plumb off the string. I make 5 or 6 marks on each limb then double check them by holding the square on the opposite side of the string at each mark, and when it all checks out... connect the dots with a flexible straightedge. A full length piece of fiberglass clamped down with spring clamps works well.
This is a good method to use in the absence of a big perfectly flat bench and will tell you if both limbs are in the same lateral plane, how well the riser and limbs are all aligned off the press... and perhaps how well your press is constructed.
If I didn't describe that well enough and a picture would help, just say so.
Topic: 2021 what did you do today? (Read 150518 times)
