- Joined
- Oct 17, 2010
- Messages
- 2,424
Ok, the one thing I'll say is, that if as you're grinding, you see the finish looking dimpled, usually it's time to redress. When you took those first passes after dressing the wheel, did the dimpling seem to get better, or stay the same?
The only other thing I'll mention is that you engaged the dresser quite heavily before taking a few more thou passes, but if you engage 10 thou on the first pass, you may need to go more than that much in thou increments to get past any fracturing you did from that huge initial engagement. When I dress my wheel, I make sure the diamond is under the wheel, I feed Z down slowly until I hear it engage barely, then I pass Y in and out before feeding down Z another thou or two. Unless I'm shaping a wheel, I never go more than a couple thou. Even that is pretty excessive if you're shooting for fine finishes.
Is this wheel a Norton or other quality wheel? Some of my wheels are probably 20+ years old and they work fine. Although some wheels that are highly friable don't give good finishes no matter what.
I can probably scoot down Wednesday if we don't figure this out otherwise.
Also, you had me cringing when you were cleaning the chuck with the wheel running and no guard. I'd recommend stopping the spindle. If you accidentally hit the wheel when it's running with something, and you shatter that wheel, massively bad shit is going to happen, most likely to you and everything around you. If you just accidently brush it with your had, massively bad shit is going to happen to your hand. I've been bitten by wheels before, under much safer circumstances, it's bad news. I'm no safety sally, but you really need to be careful around this.
The only other thing I'll mention is that you engaged the dresser quite heavily before taking a few more thou passes, but if you engage 10 thou on the first pass, you may need to go more than that much in thou increments to get past any fracturing you did from that huge initial engagement. When I dress my wheel, I make sure the diamond is under the wheel, I feed Z down slowly until I hear it engage barely, then I pass Y in and out before feeding down Z another thou or two. Unless I'm shaping a wheel, I never go more than a couple thou. Even that is pretty excessive if you're shooting for fine finishes.
Is this wheel a Norton or other quality wheel? Some of my wheels are probably 20+ years old and they work fine. Although some wheels that are highly friable don't give good finishes no matter what.
I can probably scoot down Wednesday if we don't figure this out otherwise.
Also, you had me cringing when you were cleaning the chuck with the wheel running and no guard. I'd recommend stopping the spindle. If you accidentally hit the wheel when it's running with something, and you shatter that wheel, massively bad shit is going to happen, most likely to you and everything around you. If you just accidently brush it with your had, massively bad shit is going to happen to your hand. I've been bitten by wheels before, under much safer circumstances, it's bad news. I'm no safety sally, but you really need to be careful around this.
