Heres a machine i made a few years back when I found myself with a need for micro thin wood
Its a sander thicknesser using an old tumble dryer motor turning a n 80 mm roller wraped in 80 grit emery cloth it revolves at 1900 rpm and is adjusted by a pair of opposed wedges the bottom one conected to the screwed rod and wnen its screwed in it rases the bed up towards the roller controling the thickness. More in the next post