Edge pro angle measurement

So... Is what I've been doing incorrect then?

I've been placing the angle cube lengthwise on the flat of the Edge Pro and zeroing it. I then put the knife in place on the Edge Pro (held by magnets) and set the arm of the Edge Pro (with sharpening stone in place) on the edge of the knife and adjust the angle by placing the Angle cube lengthwise on the flat of the sharpening stone.
 
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You are probably off 2~3 degrees because of the blade primary grind.
So if you are sharpening at 15, it might actually be 12-ish.
 
I see a lot of factory blades that are not ground evenly. Since many of these are hand-ground, that's not so surprising. When I get one in and need to re-profile, I put it on the Edge Pro with a 2" x 6" x 5/16" DMT Extra-Coarse Plate for the Edge Pro and even out the bevels. Super-steels tend to cry when they see it coming... available on various Google sites (and DMT) for about $40.
 
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miso2 said:
You are probably off 2~3 degrees because of the blade primary grind.
So if you are sharpening at 15, it might actually be 12-ish.
Click to expand...

Makes sense.

So if I was to zero the angle cube on the flat... And then place the knife on the flat and measure that angle... Divide that by 2... And then subtract that from whatever the angle cube is showing when I have it on the sharpening stone to measure the knife angle... That would be correct? Or am I still missing something.
 
Yes.
That is what ApostleP did in the vid.

You can write down the primary grind angle for future reference and add the half of it to whatever angle you want to sharpen the knife.
If the primary grind angle is 6 degree, and you want to sharpen the knife at 15, then set the angle of the stone flat to 18 degree.
 
miso2 said:
Yes.
That is what ApostleP did in the vid.

You can write down the primary grind angle for future reference and add the half of it to whatever angle you want to sharpen the knife.
If the primary grind angle is 6 degree, and you want to sharpen the knife at 15, then set the angle of the stone flat to 18 degree.
Click to expand...

Gotcha, I must have missed that part when I was skimming through the vid to check his technique.

Perfect. That's an easy enough fix. Thanks a lot! :)
 
This is a great thread, gentlemen. Thankfully for me I have no need nor obsession to be quite so precise, but the information is nonetheless useful.

I don't have an angle cube but when I've done such calculations in the past, (from curiosity), I've used one of these which I've had in my workshop for years:

johnson-specialty-hand-tools-700-64_1000.jpg


No digital readout but the info is roughly the same.

(BTW, Miso, my Edge Pro Apex table read at the same 29.5* angle when I checked it last night.)
 
miso2 said:
I measure the angle of the stone, when it is set on the blade but not on the table edge.
So, it doesn't matter how much the edge sticks out from the table edge.
Click to expand...
Agreed. I included that only because so many instructions out there tell people to measure from the table edge. Wanted to show people why this isn't correct.

Blues said:
This is a great thread, gentlemen. Thankfully for me I have no need nor obsession to be quite so precise, but the information is nonetheless useful.

I don't have an angle cube but when I've done such calculations in the past, (from curiosity), I've used one of these which I've had in my workshop for years:

(BTW, Miso, my Edge Pro Apex table read at the same 29.5* angle when I checked it last night.)
Click to expand...
That's a nice gauge. I often prefer analog to digital. Digital tends to give a false sense of precision. I'll check my EP table later today.
 
RipD said:
That's a nice gauge. I often prefer analog to digital. Digital tends to give a false sense of precision. I'll check my EP table later today.
Click to expand...

They're pretty inexpensive, about $14 at the big online shopping venue, in case you want an analog angle finder without need of batteries. It can be used with either the magnetic or non-magnetic side down for convenience and functionality.
(Of course you have to supply your own "memory". ;))

It comes in handy from time to time.
 
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