Reply To: Error in sharpening, how to corect them? Welcome! / Forums / General Woodworking Discussions / Tools and Tool Maintenance/Restoration / Error in sharpening, how to corect them? / Reply To: Error in sharpening, how to corect them? bow 7 September 2014 at 3:04 pm #65655 i have sandpaper glass plate and a grinder also….but i’m not able to use grinder with accuracy. So i chose sandpaper Settings