My homemade potato digger 

I share my self-made potato digger, built for a row width of 70 cm
It also contains the dimensions at the end of the video and details of the construction
Please note that, he swing arm bearing should not be self-centering, I had to weld it.
I have observed that in these devices with systems that reverse direction, it is advisable to install a flywheel, which absorbs the small impact produced by said change so that it is not transmitted to the entire transmission.