There are my techniques to sharpen knives for a mincer. I like to use the second one and the second shape of knife is preferred.
Timing:
► 0:14 With the use of an electric drill or screwdriver, dowel and sandpaper
► 3:13 Making hand wood brick support for a piece of sandpaper and a screw conveyer
► 7:17 Standard grindstone sharpening - right angles

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