Typically, turners use a grinder to sharpen. Most turners sharpen by hand, that is holding a gouge or other tool in both hands and presenting it to the grinder. The problem is, most people are not sure how to put an edge on the tool so they step up to the grinder with fear, trepidation and thus stiffness. Gingerly, the tool edge is rolled over the grinding wheel. Then, not sure if the edge is sharp, the whole tool is raised to the nearest light and the edge carefully examined and found wanting. Unfortunately, by the time the tool is returned to the grinding wheel, both hands have moved to different positions, the sharpener is more nervous than ever, and the grind is made worse instead of better.
Here are a few hints to make sharpening easier and the hobby of woodturning far more fun.
First, fix the grinder up for sharpening. Use an aluminum oxide, 80 grit wheel for sharpening and leave the coarse grey wheels for those occasions that you need to grind away a nick or restore an edge entirely. Make sure the wheel is clean. You will get steel filings imbedded in the stone as you continue to sharpen. Dress the wheel with a star wheel dresser to clean the surface.
Second, relax. A gentle touch will produce smooth movements and thus smooth surfaces on the tool edge. Go to the grinder to perform a gentle movement and first go with the grinder off. Practice the grind you want to do with the grinder off and get a feel for the surface of the wheel. Then, with the grinder on, gently sharpen the tool.
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