Hi all
I’ve been tuning my new jointer, a small 6″ Grizzly, and have run into a weird issue. When face jointing a piece of wood, the front part being fed first through the blades loses more material than the back, even if the piece is perfectly flat to begin with. Thus the front edge is a little thinner than the back. It gets worse with more passes.
I don’t think it’s my technique since I’ve used a Powermatic 8″ (tuned by someone else) without the issue. Also, I don’t have any issues with the wood sniping at the end of the board or binding against the outfeed table at the beginning, thus assuming my knives and outfeed table are set right.
Anyone know what could be causing this?
Thanks
Scott
Replies
If the infeed table was not parallel to the outfeed but slanted up away from the cutter, that would cause your problem. John White's "Care and repair of shop machines" describes shimming jointer tables.
Thanks for the info. I'm pretty sure they are parallel, but I'll check again to make sure. Your help is much appreciated!
I have a 6" Grizzly jointer as well and encountered the same exact problem a few months ago. I knew it was something I had done because it was working fine until I had the blades sharpened and had reinserted them into the jointer. Oddly enough it seemed to magnify with softer woods (??!!! Explain that one). My infeed and outfeed tables were parallel, but I discovered that my outfeed table was raised just a hair too high. It wasn't enough to catch the board when I was feeding it, but enough to pull it just a bit off the cutters and taper the cut. Recheck your outfeed table and try lowering it just a tad to see if that fixes the problem.
Thanks Jay! I'll check that since I just adjusted it last night. I was also doing all of my testing on softwood, pine and fir, since it's plentiful where I live. I'm going to test it tonight :)
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