"George" wrote in message
t...



There is no parallel reference on a jointer.

Really?

Yes really.

Unlike a TS, a thickness planer, a thickness sander, or a RAS the jointer
has no fixed reference to insure exact width or thickness. On paper the
jointer should give you parallel edges if you started with parallel edges
but with the jointer you enter the human factor that controlls the
reference.


I thought the cutters took off a measured amount all along the
length, based on their height. If you started parallel, you should get
parallel, less the equal amount removed by the cutters. I can't measure
the difference.

With a single pass, perhaps but if you want a board 1/2" narrower the
accumilated error will probably be measurable. Better to have the TS set up
properly and there would be no reason to revisit the jointer.