[reuelt]

Hello, first timer here. Just purchased a SM 19/38 drum sander, I have followed all the adjustments mentioned in the manual. Issue is, I tried sanding a 1”x3” piece of solid stock on edge, it was cut almost perfect on table saw, just wanted to try new sander and clean up saw marks, made very light pass and ended up with more material being sanded off in the middle of the piece when compared to either end, so when butted to anther piece of wood, there is a void between the two pieces. Anyone know why this happened?
Thank you in advance!

I think, the conveyer belt is not level. The two end rollers are probably higher than the middle plate(?) supporting the the belt. The rollers at the end should be level or a little lower.