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Hi, i am after information on building a bandsaw blade sharpener using an electric chainsaw sharpener as the motor to spin the grinding wheel
The info I am after is the development of a push feed for the blade and a cam action to move the blade/moror up in the shape of the tooth
Interesting, will you be incorporating a tooth set feature as well?
Not knowing the profile of the teeth I am trying to visualize a single lever advancement which also pulls the saw down once the tooth is in position then raises the saw before advancing to the next tooth. I have a chain saw sharpening grinder an idea is forming in the back of my head but don not have the time to sit and try to work out the design just now maybe someone else will chime in with their ideas
Looks like an interesting project. Might I suggest a microprocessor like Arduino or Pic or.... to run a couple of pinch rollers through a stepper drive, this will allow settings for tooth count. Perhaps an air cylinder and stops for setting and plunging the grinding head, also timed by the processor.
here is a simple sharpener a guy made
https://youtu.be/GRFASuwGodE
Great tool! Elegant in its simplicity and best of all, dirt cheap!
in re the video example;
Plenty adequate on hook [wood and aluminum] profiles, if maintaining minimum removal at top of tooth. I'd guess a well but evenly worn band could withstand 3 full re-sharp grinds, allowing .005 to .010 each time. 3, maybe 6 TPI might take 10-15 minutes, easily 3 blades an hour. A 120" x 1/4" Grizzly is 70 bucks, easy math.
I'd add a screw adjustable stop, a light return spring, some wax, and rail to insure sled rides on the fence. I'm sure those would net a +10% free reduction in time.
This won't work on ferrous raker set blades very well.
you might check the woodmizer web site for ideas. I have a woodmizer and when I got it, it came with a sharpener which has advance, drop to sharpen, an ecentric to drive the advance, a cooling bath all in one
Check out woodland mills sharpener. Just got one. Not meant to sharpen entire tooth profile but can easily be modified to do so. Good results so far and and verry happy for the price.
That's John Heisz. Brilliant guy. His schtick is making tools that at first glance seem to be a bit of cleverness, but are well thought out and at times genius. I've been a subscriber of his YouTube channels since before he talked. I thought he was a member here.
This might help. The blade advance and grinder lift is powered by a DC motor (originally adjusted treadmill angle). Grinding the cam was somewhat tedious, took too much off one area and had to build it back up as you can see.
Attachment 21057
Looks great! Wish I had the time to have built one my self:( I will be building a tooth setter though. Good work! How do the blades cut?
The sharpener works fine, blades cut as good as new if I get the set correct. My tooth setter does not meet my expectations, looking forward to seeing what you build there.
