On 3/14/2021 9:53 PM, John Grossbohlin wrote:
"Leon"Â* wrote in message
...

On 3/12/2021 10:39 PM, John Grossbohlin wrote:

I've been thinking about that roller and also about some of the boards
I've run through my DJ-20. The beds on the DJ-20 are 76.5" and I've
run 12'-16' stock through it. The wood drags on the edge of the infeed
table as it's fed. I'm thinking that the roller would likely reduce or
even eliminate that friction and make it easier to feed the wood.


Yes.Â* But when the end of the board clears the roller it falls and
drags on the end of the in feed table....Â* ESPECIALLY on boards less
than 8' long.

Eliminating that friction or drag would be temporary with every board
that is longer than the in feed table.

Yes, it's temporary. However, when you have 12-16' boards in play the
last thing you need is more friction while you've got all that wood
hanging out there!

By the time the end of the board reaches the roller it's a non-issue.
This as the problem of the board drooping, even a little, over the end
of the infeed and dragging is all but gone by then... The feed pressure
is on the outfeed table within a foot or two of feeding and that
generally controls the cut. When face jointing, if a board is so bowed
or twisted that more than droop is creating a lot of friction at the end
of the infeed table I'd think it should be cut to shorter lengths. This
as there might be nothing left by the time it's flat!Â* Likewise, for
edge jointing, if the crook is real bad it should either be straight
line ripped or cut into shorter lengths.

Me... bow/twist/crook assessments take place before the wood gets to the
jointer and if they are bad enough a saw will be involved before the
jointer is used.Â* It's the droop induced friction on the long boards
that would be nice to moderate and a roller could help do that.



Gotch'a I can clearly see how this would be a good feature with
loooooong boards. They likely would bend and straighten as their ends
reached the roller.

I was thinking more in lines of the lengths that "I" would likely be
running through the jointer. Less than 8' and really likely less than
6' and boards with bends.