sharpening jig idea

[cody michael]

i wanted to know if this would work and if not why not. it seems simpler then other jigs. to sharpen bowl gouges

why can't you take a homemade jig. the part you would use to sharpen roughing gouges. and just put one pivot point in directly under the edge of the grinder. then swing the jig from one side all the way to the other? wouldn't this do same motion as the "normal" jig setup? here is a really bad picture

[Thom Sturgill]

I'm having trouble visualizing what you are talking about. The two main methods, grinding with a jig and grinding with a platform, do not produce quite the same profile. In the jig the tool moves along a conical shape and presents the same angle to the wheel. Grinding by moving side to side on a platform while twisting the tool can produce the same profile, but I don't think it will produce the same bevel.

To me, the 'simplest' are fixed jigs like the Ellsworth (http://www.packardwoodworks.com/Merchant2/merchant.mvc?Screen=CTGY&Store_Code=packard&Category_Code=sharp-ellsjig) or Packard (http://www.packardwoodworks.com/Merchant2/merchant.mvc?Screen=PROD&Store_Code=packard&Product_Code=148801&Category_Code=sharp-sgj)jigs that just depend on having a point for the arm to rest on. The two points of adjustment are how much protrusion (handled by another jig (http://www.packardwoodworks.com/Merchant2/merchant.mvc?Screen=CTGY&Store_Code=packard&Category_Code=sharp-guiblo)), and where the pivot point is in relation to the wheel which changes as the wheel wears if it is a fixed point in relation to the grinder arbor. The raptor (http://www.woodturnerscatalog.com/store/Sharpening___Universal_Jigs___Raptor_Set_Up_Tool__ _raptor?Args=) jigs solve that issue.

[JerHall]

Cody,

If I understand you correctly you are asking why you can't put the end of a bowl gouge handle in the "V" of the arm and just sharpen the gouge that way. You can. You will get the "traditional" grind like the roughing gouge. You could do a little swinging from one side of the wheel to the other and put a little fingernail sweep back. Nothing wrong with that that I can see.

But if you want a more extensive sweep back, or fingernail grind, as Thom suggests, you need a "fingernail" jig. You can build one for peanuts and it works as well as any other, safer than most because it is of wood. See plans here: http://docs.google.com/View?docID=admp7zph558w_bcj4t5jchs7kq&revision=_latest

[steven carter]

Cody,

It looks like to me that you want the pivot point to be on the table under the wheel, and then adjust the angle where the two pieces meet. It seems to me that the pivot point would need to be a ball and socket type arrangement, and also would need to be moved forward and backward.

There is a great site for making you own stuff, run by Darrell Feltmate. He does homemade sharpening jigs, as well as a lot of other tools, you might want to check it out. It is aroundthewoods.com.

STeve

[Michael Gibbons]

It looks like like a pendulum motion you have there. The bowl gouges almost have a " compound curve" I guess you would call it. The handle of a bowl gouge needs to move in a pointed-rainbow arc motion versus a golf swing. check out the Ellsworth gouge jig.

[cody michael]

ok thanks i'll check out those. :)