I have struggled with this same question for over a year. I set and reset my Wolverine Jig and Vari-grind countless times. I got close but never perfect. I also had several persons tell me it doesn't matter. Just get it close.
A month ago I attended David Ellsworth's School of Woodturning. It was great. I took my grinder, Wolverine Jig and the Vari-grind with me to have Mr. Ellsworth himself help me set it up. I found out the following things:
- The Wolverine Jig arm on an 8 inch grinder is too far away from the center of the wheel to be set up correctly. Mr. Ellsworth helped me make a small add-on wood block to set in the cradle to raise the height up to the proper level (about 1.5 inches higher on mine).
- The vari-grind does not work as well as the one that Mr. Ellsworth sells. I purchased his. It had the correct angle and the correct distance for his recommended setup. It also does not hit the side of the grinding wheel when turning from side to side.
- The shape of the flute of the gouge you use can make a difference. My old gouge will not look exactly right even when the grinder and the jig are set up correct. His signature gouge works great.
Woodcraft has a page that shows exactly how to set up the dimensions for this kind of grind. The web page is at the following address:
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there click on "Instructions for 140194" on the right side of thepage. If you use his jig instead of the Vari-jig the dimensions aregiven on this sheet along with drawings to help you visualize. Grinding this gouge correctly coupled with the tips on using it that I got from Mr. Ellsworth are making a big difference. He does not show all the cuts he uses on his current tape. You have to take the class.
Good luck, Ted