6″ Delta jointer not producing straight joints. Boards are coming out with a convex bow to them. Is the outfeed table set too high for knives? Tables are true to each other.
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Replies
Do a search for this question, but I think that you are correct. Outfeed table too high.
John
Dam ,
The knives should be a bit proud of flush to the outfeed table . Also dull knives will give way poor results . I was actually looking into purchasing a new jointer , while I was thinking about it I got the knives sharpened , well I'm not thinking about it much lately. It is amazing how sharp knives turn my old machine into a well oiled piece of equipment .
dusty
Dam
I believe your outfeed table is lower on the far end than near the cutter.
If the table was set too high, you could not pass the wood over the knives. The knives should be .001-2" above the outfeed bed.
I would check again that the infeed and outfeed table are planar across their entire length
_________________________________
Michael in San Jose
"In all affairs it's a healthy thing now and then to hang a question mark on the things you have long taken for granted." Bertrand Russell
I recheck and you were correct. It was low by 1/8" Thanks
Friend,
Would check/adjust in this order:
1. Outfeed table lined up with cutter-head (knives later).
2. Line up infeed table with outfeed-table height and check for alignment throughout the total table surfaces (coplanar), adjust as necessary.
3. Then raise outfeed table and line-up blades to it.
4. Then set infeed table for about 1/32" cut or even less. The larger the cut-set, the more the effect of uneven hand pressure, and the more effort required of the jointer, and the more error, or difficulty.
Make sure the tightening bolts which fix the tables in place are tight when cutting (before operation check tables for movement by applying some reasonable hand force), and blades are sharp.
When at all possible, joint boards close to final length, for the longer a board, the larger the correction required, and the more work and difficulty encountered.
Good luck.
-mbl-
MBL's post pretty much covers it, but you might want to look at this thread titled "Jointer technique"
forestgirl -- you can take the girl out of the forest, but you can't take the forest out of the girl ;-)
Another proud member of the "I Rocked With ToolDoc Club" .... :>)
I had a similar problem. After trying everything I took it in and it was a case of dull blades.
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