This is a 600mm wide drum sander attachment I made for my wood lathe, it was built "ad-hoc" and the majority out of bits of scrap things I had laying around ect., so unfortunately no plans are available, this enabled me to save on floor space in the shed and also to save on buying another motor, controller ect. for the full build and pics here is the URL:
Made a drum sander attachment for my wood lathe, - Pic heavy - Shop Floor Talk
Here is a link to testing out the conveyor belt on it.
Needed a couple of adjustments so the belt wouldn't slip and would track straight, but all working now.