Trying to get 42" long 6" nominal width boards of nice white oak jointed to glue up for a shelf. Now the boards touch at the ends, but have 1/16" or so gaps in the middle. What did I do wrong with this jointing on my little Delta jointer? Should I try a handplane?
Providing the machine/tables are setup properly, the infeed and outfeed combined may not long enough for the board length, and possibly your technique.
From your description, it sounds as if you may be inadvertently applying downward pressure over the knives in the middle of the pass ... it doesn't take much to get the symptom you are describing above.
Try another pass: when the leading edge of the board passes to the outfeed table to the point where there is enough room (about a third of half way), smoothly transfer one hand, then the other, so that _both_ are on the outfeed table, and far enough away from the knives so that any downward pressure on the board is transferred to the outfeed table only.
See if that doesn't help ... if it doesn't, then you either have a setup problem, or the length of the boards are just to great for the size of the machine ... however, you can often overcome this with practiced technique.
A plane would work, but may take more technique, so either check the jointer setup, or practice your technique on some scrap until you get the results you're looking for.
Me Who Has No Experience says: Your glue-up would go better if it were
1/16" (or probably even more) FATTER in the middle--that's supposed to be even better than FLAT. With that in mind, I would hack out wood away from the middle, of course, the same amount on each side. Maybe a final pass through the jointer, smoothing off just 1/32" with your goal in mind. Then see how two of them clamp.
Please let me know how works out! Hopefully, someone will correct me if I'm too far off base. Good luck! And, careful on the "hacking" part! : )
Han wrote in news:XnsA1259E480E76Fikkezelf@8.17.249.105:
I tried re-jointing, but I think the beds of the jointer aren't long enough. I started a glue-up as a trial with 3 boards (I need a few inches more later). When the glue has dried, I'll saw along the glueline with my fancy Freud blade to make "jointed" edges, then re-glue the boards. I have another shelf to make and the not yet jointed boards line up better ... I tried to make a better shelf, and muffed it up on the first try. Oh well trial and error hits again.
05: > Trying to get 42" long 6" nominal width boards of nice white oak > jo= inted to glue up for a shelf. Now the boards touch at the ends, but > have =
1/16" or so gaps in the middle. What did I do wrong with this > jointing on= my little Delta jointer? Should I try a handplane? I tried re-jointing, bu= t I think the beds of the jointer aren't long enough. I started a glue-up a= s a trial with 3 boards (I need a few inches more later). When the glue has= dried, I'll saw along the glueline with my fancy Freud blade to make "join= ted" edges, then re-glue the boards. I have another shelf to make and the n= ot yet jointed boards line up better ... I tried to make a better shelf, an= d muffed it up on the first try. Oh well trial and error hits again. -- Bes= t regards Han email address is invalid
When you joint, get your down pressure onto the outfeed table as soon as po= ssible then pull the bord across the blades with pressure down in the foirs= t few inches to mid point of outfeed table.
glue up for a shelf. Now the boards touch at the ends, but > have 1/16" or so gaps in the middle. What did I do wrong with this > jointing on my little Delta jointer? Should I try a handplane? I tried re-jointing, but I think the beds of the jointer aren't long enough. I started a glue-up as a trial with 3 boards (I need a few inches more later). When the glue has dried, I'll saw along the glueline with my fancy Freud blade to make "jointed" edges, then re-glue the boards. I have another shelf to make and the not yet jointed boards line up better ... I tried to make a better shelf, and muffed it up on the first try. Oh well trial and error hits again. -- Best regards Han email address is invalid
possible then pull the bord across the blades with pressure down in the foirst few inches to mid point of outfeed table.
i wonder if a hold down, similar to board buddies, would be a good idea to make this an easier repeatable task.
------------------------------------------------------------------- If this is that 4" wide, benchtop jointer, then your 42" long board is the problem.
I always had the same problem on boards much over 30" long.
I ended up using a straight edge and a router with a pattern bit.
I used to straighten my boards with a piece of 12" wide plywood and my TS. Clamp the board to the plywood with the edge you want to straighten overhanging the plywood. Run the edge of the plywood against the rip fence.
If you can get that down to a fat 64th, you've done it just right - compressing that gap with clamps puts enough pressure on the ends to ensure that they won't separate over time.
HomeOwnersHub website is not affiliated with any of the manufacturers or service providers discussed here.
All logos and trade names are the property of their respective owners.