Why reverse it?
I have been putting an edge on my blades on the belt grinder. I have seen some makers have dedicated grinders with the motor reversed just for sharpening.
What do you think?
I was thinking of putting a drumswitch on my grinder to reverse the motor for sharpening.
Why reverse it?
I think the belt moving away from the edge might be easier on the belt instead of turning into the edge. Hopefully I can get some feedback
Ahh, so you want the edge up...
I just sharpen with the edge down, and mine IS reversible...
So little pressure is used when sharpening on a moving belt there is little affect to the belt's surface.
I sharpen with the edge towards me the belt turning towards me, in the slack part of the belt. Frank
Some folks feel they have a better idea of the blade angle when observing it from the spine, so they hold the blade edge away from you and run the belt the same way. This does allow the blade to be more evenly ground from both sides, as well as tosses the blade away from you if an OOPSIE happens. If they set up a dedicated grinder for this, the belt is often run at a very slow speed, and they use a different gearing ratio in the pulleys and wheels to allow more torque and much slower speed than a blade grinder would run at.
That probably doesn't make it worth having a dedicated grinder for most shops....but who doesn't want more equipment.
I have one I built that runs 2.5X48" belts on a VS 3/4HP motor that has a max output speed of 75RPM. It will run from crawl to about 100FPS without any possible stalling. It has jigs to sharpen the blades at any angle desired. While a really cool tool ( no pun), it is hardly ever used.....maybe in the new shop it will get a permanent spot and get used more.
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I use my 1 x 42 belt sander for sharpening. Edge down.
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I like the edge away from me. Instead of switching wires, I just turn the grinder around. I've found paper wheels work better that way too on a Baldor buffer.
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I use a variable speed Wilton and sharpen by slowing the machine right down and using a fresh belt dedicated for sharpening. Once the belt begins to lose its performance i toss it in the mix for general work and use another fresh belt for sharpening. This is the primary sharpening step, then I fine tune the edges by doing the final sharpening by hand.
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