Reply by fussy

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Posted on Trailing edge of lumber never touches jointer knives

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980 posts in 3051 days

#1 posted 08-12-2012 05:50 AM


Before you go adjusting things, try adjusting your technique. You say you are applying gentle downward pressure on the outfeed table. Try concentrating and applying a bit more downward force on the outfeed. I think you’re being too gentle and are ending up with a darned effective tapering jig. Unintentionally, of course.

Also, 6 foot boards on a 6” jointer, while not unreasonable, might be a bit much until you get the hang of it. A jointer is a relatively simple tool in design, but demanding in technique. Pressure applied at the wrong point will turn a lot of lumber into wood chips. After getting about 6” past the knives, start shifting more and more pressure to the outfeed side until there’s no pressure on the infeed. Also, be aware of the effect gravity is having on the outfeed pulling the jointed side down and the unjointed side up off the table and skipping the blades. This is especially prevalent with long stock.

I would practice with cheap stuff—2×4s—until you get the results you want. Start with 3 or 4 foot stock and then go to 6 or 8 foot. It won’t take long to determine if the problem is technique or adjustment. Perfecting your method first could save a lot of trouble if you end up messing up what turns out to be a perfectly well adjusted machine.

I had much the same problem when I first started dressing my own lumber. A good friend talked me into trying this before trying adjustments. Try it. It could help.


-- Steve in KY. 44 years so far with my lovely bride. Think I'll keep her.

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