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Have you seen the construction of this machine?
Drum Sander - Thickness Sander Making Video & PDF Dimensions
I updated my Drum Sander. This drum sander now has a motorized slide. No need to use your hands anymore to push and pull. Sanding any woods easly. You can download the gears template (PDF). Print it 100% scale. I used for print the chrome browser.
Making Video :
Go to this video's Youtube page and make a comment.
PDF Download : Drum Sander Motorized Feed Mechanizm
This is the page that contains the desktop jointer's videos. You can view the 3D model video. You can download the PDF plan.

Circular Saw I made using an old saw blade.It gets its power from the drill.