On Monday, January 15, 2018 at 10:16:23 AM UTC-5, dadiOH wrote:
"DerbyDad03" wrote in message
...
On Monday, January 15, 2018 at 8:28:15 AM UTC-5, dadiOH wrote:
"DerbyDad03" wrote in message
...
On Sunday, January 14, 2018 at 1:56:44 PM UTC-5, dadiOH wrote:

There is no need to, left hand holds the work against the outfeed
fence, right hand moves it along. Now, if the work were much more
than
36"
long, you would have to move your right hand but not your left; no
matter,
left is still holding it where it should be.

I just changed my feed method and hand positions. I did not change my
fences.
I was able to joint a 36" board without any bumps.

I was previously holding the board down and against fence with both
hands
on the out-feed side. Even tried paddles. This time, partially based on
your wording, I installed a feather board to hold the board down and
placed
my left hand on the table, keeping pressure on outside edge of the
board
to
hold it against the out-feed table while moving it with my right.
Perfectly
jointed edge.

YAY!. As a refinement, you don't need the featherboard, your left hand
can
easily hold it both in and down.

Belt and suspenders. Easily attached, provides peace of mind.


There remains the reason behind your bumps. Even holding it as you
described, there should have been none. For a bump to arise, the board
has
to have slightly moved away from the bit, then moved laterally, then
returned to the bit.

Exactly - as previously stated very early in this thread.

The simplest explanation is that there was a fulcrum;
ie, the fence halves were not parallel.

I'm not sure why you keep going back to the fences. In the post you just
responded to I stated that I did not have to adjust the fences to
eliminate
the bumps. It was all caused by improper hand positioning.

Because if the fences were parallel and you kept the work against the fence
when changing hands you should not have made a bump. If they were NOT
parallel there would be a fulcrum; if you applied greater/lesser pressure
toward the fence on the work piece on one side or the other of the fulcrum,
you'd get a bump; if you applied pressure correctly, no bump even if the
fences were less than parallel.

IOW, holding as you did should not cause a bump.

Do you know how I was holding it when the bumps were created vs. how I
modified the holding process?

It should be painfully obvious by now that fences are/were fine based on the
fact that I have repeatedly said (and if I ever wanted to post in all caps,
this would be the time) I am now able to get a perfectly jointed edge without
ever having changed the positioning of the fences.

If the fences were part of the problem I seriously doubt that I would have
been able to eliminate the bumps simply my changing the feed method/hand
positions.

Please stop bringing the fences into this situation. I'm not saying that a
fence mis-alignment wouldn't cause this problem, I'm saying that the fences
(imagine all caps again) were not a factor in this specific case.


The other explanation is that you
were physically moving the work to create the bump.

See your "For a bump to arise" sentence above. Also, that fact was
previously
stated very early in this thread.

In either case, I'd
think the problem would be immediately obvious. Why wasn't it?

It was. Why do you think I started this thread?

I should have said, "In either case, I'd think the SOLUTION would be
immediately obvious."