File guide

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unky_gumbi

Joined
Aug 28, 2009
Messages
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I just got this today, had a friend make it for me to keep my bevels even.
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Tell me what you think, I have given it a couple of passes on a blank I made for practice and it works like a dream. I still need to get a couple of bubble levels to mount to the base so that my angle gauge reads accurately. Not too sure on the Quick releases may just switch to vise grips to hold the blades in place.
 
Wow, that looks to be both an excellent piece of engineering and construction. Kudos to you both. It'd be great to see more action photos. ;)
 
yup he would, takes about 2 weeks for him to gather the parts, do the machining and assembly. Its a fair size, 20"x20" base I I would guess around 25lbs when finished
 
Farmer Phil said:
Wow, that looks to be both an excellent piece of engineering and construction. Kudos to you both. It'd be great to see more action photos. ;)
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There eare a few bugs to work out, think the arm could use to be about 4" longer. I will be putting to the real test in a couple of weeks once my steel gets here. Was thinking of doing a "fist knife WIP" thread here.
 
Just to point out, this rig has the same problem as most sharpening jigs: the angle (taken perpendicular to the edge) will vary as the edge "bends" up the belly, as well as the angle varying if you stick the belly out from the support.

Although you may not be as anal retentive as I am, and thus not see the variation as a problem, the solution would be to (possibly after having gotten the bulk of the material off with the blank clamped in place) hold it in place with your off hand, translating and rotating it as you go along so that the part you're grinding is perpendicular to and in line with the edge of the support.

If you've ever seen the EdgePro instruction video, it's the same kind of idea as moving the knife along the support there, except that with your rig you don't have to worry about the file/stone rotating along the vertical axis.

Yes, I am an engineer in training, why do you ask? :p
 
Lucky Bob said:
Just to point out, this rig has the same problem as most sharpening jigs: the angle (taken perpendicular to the edge) will vary as the edge "bends" up the belly, as well as the angle varying if you stick the belly out from the support.

Although you may not be as anal retentive as I am, and thus not see the variation as a problem, the solution would be to (possibly after having gotten the bulk of the material off with the blank clamped in place) hold it in place with your off hand, translating and rotating it as you go along so that the part you're grinding is perpendicular to and in line with the edge of the support.

If you've ever seen the EdgePro instruction video, it's the same kind of idea as moving the knife along the support there, except that with your rig you don't have to worry about the file/stone rotating along the vertical axis.

Yes, I am an engineer in training, why do you ask? :p
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Being that niether end is attached you can move the file to get just the right angle of attack, and how did you know I got the idea from my knife sharpener:p

I had done a couple of freehand test runs to see if I could hold a constant angle and realized I wasn't that good at it. When I sat down and started laying this thing out on the computer, I realized exactly what you are pointing out, and realized that i had two options rotaate the knife or the file, the file was the simple (cheaper) solution, but not the best.
 
Well if he's interested in making another, after all the bugs get worked out I'd be interested in knowing what the price would be. Although if he's in Canada the shipping to the US might be a bit interesting.
 
unky_gumbi said:
Being that niether end is attached you can move the file to get just the right angle of attack, and how did you know I got the idea from my knife sharpener:p

I had done a couple of freehand test runs to see if I could hold a constant angle and realized I wasn't that good at it. When I sat down and started laying this thing out on the computer, I realized exactly what you are pointing out, and realized that i had two options rotaate the knife or the file, the file was the simple (cheaper) solution, but not the best.
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The only problem with rotating the file (clever way to look at it, by the way) is that you increase the effective distance between the rear support and the edge you're cutting. Effectively, you trade the issues with not cutting perpendicular to the tangent of the curve for a whole bunch more of the issues from the belly sticking out from the blade support.

Again, this is me being anal-retentive. As long you're happy with the results all this talk about angles and geometry is moot.
 
I was just wondering, now that I have this thing, what would be the best files to use in it? It is set up with a 10" Nicholson Mill Bastard in it in the picture, but there must be something better for quick material removal
 
12345678910 said:
That's one of the most interesting uses of a "T" steel fence post that I have seen.
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I just wanted to clear this up, its not a fence post, its from industiral overhead doors, much stronger and a higher quality of steel. its also thicker and larger dimentions then the standard T fence post steel
 
that's really cool.
 
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