Accuracy On Jigs

[Kenneth]

What accuracy do you aim for when building a jig?

I made a routerplanning for necks but I'm not satisfied with the accuracy.

The differance in height at most is 0,3mm (just above 0,01").

I'm guessing I'm way to picky, but I just wanted to check your opinion.

My opinion in these matters are that any errors will multiply as you go along.

Those 0,3mm will increase to 0,6 when I add the fretbord (routed in the same jig),

and after routing the radius I could end up with 3* the error almost 1mm...

/Kenneth

[Mattia]

...as accurate as possible and necessary. Frankly, if the jig's made of wood, just sand it until it's level and square.

[fookgub]

If your jig is just slightly out of square, can't you just alternate the direction of each piece thereby canceling out the error?