Setting the initial angle on Edge Pro w/ angle cube

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Jan 9, 2014
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First off let me say, I received my Edge Pro Apex yesterday and I love it. I would like to clear up a couple questions I had before I start using it, if anyone would be so kind to answer them.

I like to utilize precise measurements to sharpen, if possible, because yes, I'm anal. I don't have an angle cube, but am using the iHandy level app for iPhone and have found it to be fairly accurate. I was playing around checking some angles last night which led to a couple questions I have before I begin sharpening.

I placed my phone on its side, parallel with the Edge Pro table, and zeroed it. With a stone in the arm, I rested the stone on the edge of the EP table and moved the adjustable end of the arm to just underneath the red dot (15 degree mark), placed my phone on top of the back side of the stone parallel with the arm, and this yielded a measurement of exactly 15.0 degrees. Outstanding! On another note, the next mark up was 18 degrees as advertised, but the yellow yielded exactly 20 degrees instead of 21, and the blue yielded 22.5 every time rather than 24. If someone else has checked these with a cube, feel free to comment. It's not that the dots' respective angles matter that much to me, I'm just looking to verify if my phone is correct.

For testing purposes, I placed my Paramilitary 2 on the EP table laying flat on the ricasso with the edge just over the end of the table and placed the stone on the edge as if I was going to sharpen. The angle changed to roughly 14 degrees, which is more acute than I want to go. This makes sense because if the height of the table edge increases, then the angle of the arm will decrease. My question is, when setting my initial sharpening angle with an angle cube on the back of the stone, should I always set the angle with the stone placed on top of the blade as if I were going to sharpen? (I do plan on using a drill stop collar so initial angle is important to me)

Additionally, if I were sharpening a FFG blade with the grind laying on the table, the method I've used is zeroing the cube on a flat surface, laying the knife on that surface along the grind with some overhang to balance the cube on the grind. I've tried doing this with two different knives which both yielded exactly 5 degrees so it seems correct. So if I were to sharpen either of these knives at 15 degrees would I lay the knife on the EP table, place the stone on top of the blade, then adjust the arm until I got an angle cube reading of 17.5 degrees (5 degrees divided by 2 plus 15)?

I apologize for making this so longwinded, but I wanted to add enough detail to give you a better understanding of my reasoning/thought process here.

So in summary, my 2 questions are:

1: When setting my initial angle with the cube, should I set it with the stone on the blade rather than the stone on the table? (I would think stone on the blade would have to be correct due to differences in blade thickness, distance of knife edge from edge of table, etc.)

2: Do you agree with my method of determining angle setting for a FFG blade or blade that doesn't have a sufficient flat area to hold on the table?

Thanks to all.
 
I'll answer the markings part... I've checked mine with an angle cube, and they're pretty much spot on.

(If, by chance you got a 'generic' EP, the markings on those are off).

There's a video on EPs website, I think it's the "Setting the Angle" one, that talks about adjusting for a FFG, you may want to check it out. http://www.edgeproinc.com/Videos.html. It's easier than trying to calculate it. :)

I don't think it matters how you set the angle in the two ways you mentioned, as long as you're consistent. Obviously, if you're trying to set an exact angle, you would want the blade in place, but either way you mentioned will work. The slight difference won't affect the end result.

Hope that helps.
 
For #1 you definitely want to set the stone on the knife and not just on the table. As you already said changing the height of the table edge with the blade will affect the angle.
 
By generic are you referring to the Amazon knockoff? Mine was ordered from KW. Kit 4

That's the real deal. :thumbup:

You may want to try a different app,,, I found some to be more accurate, although I decided it was better to just get a cube. Even the cheaper plastic angle gauges worked better for me. (If you're not aware, there was some issues with iOS 7 and angle accuracy too.)
 
About the markings I have to say that the top 3 markings are equidistant from each other; however, the gap between 18 and 15 is wider and those two markings are dead on. Weird..
 
That's the real deal. :thumbup:

You may want to try a different app,,, I found some to be more accurate, although I decided it was better to just get a cube. Even the cheaper plastic angle gauges worked better for me. (If you're not aware, there was some issues with iOS 7 and angle accuracy too.)

Yeah I may try a different app and check. FWIW, I checked the 4 slots of the sharpmaker also with stones inserted, and the 15 dps slots both yielded right around 15.5 degrees and the 20 dps slots yielded right around 20.5 degrees. Yeah may just bite the bullet again and invest in a cube. Sucks since I'm already waiting on the stop collar and a couple magnets to try out.
 
FWIW, here's a pic of mine, the one on the left is the real one, on the right is a generic.

AngleMark03_zpsae56e060.jpg

Mine is several years old, it's possible something has changed I suppose, although his QC has always seemed consistent.
 
The one on the left is exactly like mine, and I know KW doesn't sell knockoffs. I really think the app made me squint at the markings and think that one was just a hair further than the other. OK, I tried a few different apps and only really found one other that allows zeroing. Turns out it was the iHandy level app that was the problem . The other app I tried is called Bubble Level (Spirit Level) and it was basically dead to nuts at each marking after zeroing on the table. So if you're going to go the cheap route and use an iPhone go with this app and not iHandy Level. I am positive that Mr. Dale ensures the highest QC possible with his systems and I would never want to give the impression that it's anything other than the highest quality. Totally my fault for not testing more than one app; didn't know they could interpret the phone's accelerometer differently. Tested the new app on the Sharpmaker also and it gave the same readings as the old app so apparently iHandy Level is not very accurate past about 20 degrees from zero. Thanks for the help everyone. :)
 
Just in case you're interested (or anyone else)...

I can't remember what the angle cube costs, but HF sells one that regularly goes on sale. It's on sale right now at my local store actually.
 
FFG knives will yield a lower angle than a "tactical" or high flat grind, you would need to raise the arm to hit the degree you are aiming for.
 
I always zero mine on the knife resting on the blade table in the sharpening position.
 
I always zero mine on the knife resting on the blade table in the sharpening position.

I confess to being mathematically challenged!
My work bench, on which the EP stands, is level at 0º (not sure if this is relevant).
Measuring the flat area of the knife which is resting on the table as if I were about to sharpen (I am using a riser block; again, not sure this is relevant) reads 19º
Placing the angle finder on the top of the stone holder with the stone resting on the edge of the blade, ready to sharpen, reads 2º (i.e. the arm is sloping up slightly from the back pivot towards the handle, relative to the worktop.
Is the edge angle 21º per side? Or 17º per side, or can I not tell from these measurements?
Thanks
 
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after reading this a few times, I realized that the Clinometer app for 4X4 riding that is on my iPhone, had an angle scale. I fired it up, and after zeroing, held the phone on the top of the rod holding the stone in my Apex.

This should help me get a better edge when I sharpen now.
 
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