Join Date: Mar 2018
Location: Huntington Beach, California
A jointer is an electric powered substitute for a hand plane. It will make the boards flat and smooth with the edge square to the face. For thickness and parallel faces you need a planer.
To set up a jointer, there are two critical steps:
1 ~ Every knife must be exactly at the height of the out feed table. Some prefer that the knives be a few thousandths high, my preference is exactly even with the outfeed.
2 ~ The infeed table must be co-planar with the outfeed table. If this is not followed you will not be able to get a flat face on your board.
The height of the infeed (My preference) is between 1/64 and 1/32 lower than the outfeed. This setting probably will never be changed. I tend to be a lot closer to 1/64.
To use the jointer, with push pads, feed the board through using light pressure. As you pass the board through transfer your downward pressure from infeed to outfeed. It would not be unusual for your jointer to trim only the leading edge and trailing edge of the board. As you make more passes, the jointer will be flattening more and more of the board. You DO NOT want to flex the board and force it into the cutting knives. Your objective is to get the board flat.
There is one other possible problem. The infeed and outfeed tables could be warped. This is exceptionally rare and even with Chinese made junk, this problem is not seen very often. You can check this with a framing square from the home center. Just make sure that the framing square is straight.
In furniture 1/32" is a Grand Canyon