Do you know what coplanar is?? That isn't what you are looking to do, or for, coplanar the correct spelling means, in the same plane. A jointer is a simple machine to adjust properly. Here's where you and all interested must start. A simple dial indicator is a necessary evil for anyone having a wood shop, ask any machinist. if you want anything to be within .001 of an inch, Starrett is the best but, any decent one will do, don't forget the magnetic base and tool post holders. This is the essential tool for precision!! 1- Set your new indicator on the outfeed table number cutter head with knifes installed 1-2-3. If your knifes are not sharp, this is the time to replace them, sharpen them, replace them etc. New knifes, should not be installed no higher than 1/8" above cutter head, at that approx. height move new dial ind. to that end, and record setting eyeball one end of knife, snugged down, not tight, you need to be able to adjust them!! Move ind. to other end check it, and adjust till same reading is achieved. Now, you have a benchmark, at which all other knifes are to be set too. Now, the outfeed table has to be at the same height, as your newly installed knifes, this also has to be changed when knifes are worn, depending on use, and wood you're jointing! Again, the outfeed table has to be adjusted to the same height of your knifes. When all is done, and blades at are the same height, and gibs are all tight, one more check wouldn't hurt, just to confirm nothing has moved, and heigths are still the same. Carefully turn cutter head by hand, make sure knifes, do not hit anywhere. Now finally, raise cutter head to take approx. 1/32 of an inch, that should be a good starting point. I take about .015… fifteen thousand of an inch, if you take 1/32 you'll be taking .031. The infeed table, must be lower than outfeed table, for the jointer to work correctly!! You do not want coplanar!! I hope that this helped you, and everyone else, and hopefully I didn't miss anything!!