Sharpening carbide teeth on saw blades is pretty much a powered grinder proposition. Harbor Freight makes a pretty simple one @ $54.99, With their 20% coupons, it’s only $44. You can see it here on Youtube. I see a number of other methods and jigs there, too, including with a diamond wheel on a table saw. The blades is held flat on the table saw surface and indexed to put the next tooth in position.
I think there might be saw blades out there with alternating teeth slightly angle to left and right, which would complicate things, but I have a collection of about a dozen blades and they all look straight.
4 users thanked author for this post.