Dpb,

More likely the adjustment isn't correct so it doesn't clamp tight. W/
my slow dialup I didn't wait for all the pdf doc to load so didn't see
the blownup diagram so not positive the exact details of the locking
mechanism on that fence. The old Craftsman I had had a jamb nut that
had to be at the proper distance for the handle to catch it and lock
tightly. I presume this is similar. It may be the mounting bolt needs
to be brought in closer or similar. Whatever it is, the secret is in
that adjustment -- there's nothing else required to lock the fence
rigidly for use...

Fixed it. The angle adjustment on the jointer was loose. As soon as I
tightened it, the
fence became more rigid and didn't swing. Next is to remove the cutter
head
and perhaps replace the bearings and most assuredly replace the knives
or at
least sharpen them up.

Thanks,

MJ Wallace