Howdy,
Thanks, yep still vertical. It's been awhile so I hope this isn't a rehash.
Anybody with one grinder that is sharpening different pitches of chain or a square grinder that every customer wants a different grind geometry will appreciate this. We used to match mark our grinder arbors to our wheels. Vitrified wheels generally have a loose fit. Unless you mount and dress them in the same position, you end up with a wheel that vibrates because it no longer centered. The other most noticeable thing is that the wheel might only engage the tooth for a quarter or less of the wheels circumference. You end up with the wheel loading up quickly and excess heat.
Pick a spot on your grinder arbor and make a mark. Then make a mark on your unmounted wheel. When you mount the wheel, make sure the arbor mark and the wheel mark are pointing down. This way gravity is used to help the wheel find the same location every time it's mounted.
Ok, the next part is sketchy safety wise. I put the grinder head and vice to 0 degrees. Then I lay my dressing brick on the chain vise guides. I introduce the wheel as I slide the brick back and forth. Do this until the wheel has a square edge all the way around on both sides. The sketchy part is if you get aggressive it can rip the brick out of your fingers. You can do this with horizontal wheel grinders. You just need to decide whether you want to pull, or push on the wheel with the marks aligned
Anywho, once you do this you will only have to clean and shape for the rest of the wheels life.
Regards
G