I've got a Jet 10-20 drum sander. I've had it and used it for several
years. Today I used it for the first time since we moved and discovered
a strange problem.
I was thicknessing some maple boards by taking them down to 1/16"
oversize on my planer and then taking off the rest with a few passes
through the drum sander. Something I've done many times with no problems.
The boards are 4/4, about 6' long and 4"-8" wide. I set up infeed and
outfeed stands, each about 3' from the drum. The sander was set to take
off about 1/64".
What I get is a board that is, for example, 49/64" about one foot in,
50/64" two feet in, and 51/64" three feet in. Then it starts getting
thinner again until the other end. It's like the drum is gradually going
up and then back down.
I've tried running either face up and either end in first. Seems to make
no difference. I'm stumped. Help!
I'll call Jet tomorrow, but I thought I'd see if anyone here had a
solution. Probably more expertise here than at Jet :-).
Where have all the flowers gone? Pete Seeger 1919-2014