6″ Jet Jointer/thin planning impossible
I’m having trouble trying to adjust the thickness on my 6″Jet jointer. It doesn’t seem to want to level out to an almost zero cutting thickness. I’ve loosened all the adjustment locks; and that does not do a damn thing.
Help….. I’m in the middle of a project needing to joint 18 boards on both edges. ( and,I don’t want to hand plane them)
Replies
I don't quite understand the problem as stated. Are you saying that, for example, you continue to remove material from the left side of a piece while the right side just floats over the cutter head?
The first thing you need to do is ensure that the outfeed table and each knife in the cutterhead are in alignment. The process is a bit too involved to describe in a forum message, but there are numerous online and published sources that explain how it's done.
After you've gotten the outfeed table and cutterhead aligned, take a plank about 5" wide and 18" long and joint one face until it's perfectly flat. Next, take a pencil and scribble over the entire flat surface. With the infeed table adjusted high, so that you're taking the absolute minimum cut, take one more pass on the flat/scribbled surface. Is the jointer only taking material off of one side? If so, the infeed table isn't aligned. This is a bit of a problem, because infeed tables usually don't have much in the way of alignment features--you usually have to disassemble and shim them. (If the difference from one side to the other is very slight, you can usually live with it.)
-Steve
Normally you can raise the infeed table high enough that the wood won't even be touched by the knives, are you saying you can't do that? This is called adjusting the depth of cut, there is no adjustment for "thickness", as you call it, on a jointer.
If you are loosening the three or four small set screws that run along the edge of the joint between each of the tables and the base, you have thrown the entire machine out of alignment and will need to correct that first. One of the screws for each table may have a thumb turn head to lock the height setting but the remaining screws are only adjusted to take up wear on the dovetails, which is rare.
John White
FWW Experts column contributor
"If you are loosening the three or four small set screws that run along the edge of the joint between each of the tables and the base, you have thrown the entire machine out of alignment and will need to correct that first. " Let the nightmare begin. Yep, the Jet has one of those floppy thumb things that you use to unlock the infeed table to adjust for depth of cut. Problem is, the manual is completely useless in its instructions for same.forestgirl -- you can take the girl out of the forest, but you can't take the forest out of the girl ;-)
Have you confimed that the outfeed table is at precisely the same height as the top of the cutting stroke? If yes, then it seems that you infeed table is not travelling high enough (to limit the depth of cut). That's all I can say if I understand you question and without being familiar with the model.
Correct.... I removed all the lock stops "with Knobs" cleaned everthing and reinstalled them. All working OK now.......
Thanks for the help everyone !!!!!
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