Edge pro apex: angle confusion

R

Realysm42

Joined
Nov 30, 2020
Messages
105
Today I took delivery of a Hapstone angle cube, set about using it and confusion quickly ensued for me, here is why;

I zeroed the cube, on the surface you hold the knife against (the bit we all tape up).

Then, I placed the cube against the stone holder and had a play with the angle guide (black line = 10 DPS, red =15 etc). This is where the confusion began for me.

If black = 10dps (20 inclusive), why did the cube read 16 degrees?

I then tried red and got 24 degrees...

There's no way these numbers work out and I doubt the edge pro would have been manufactured so out of spec - what gives, am I missing something obvious here?
 
For Hapstone, Edge Pro type of systems, the sharpening angle depends on the knife position, stone thickness, and the primary bevel angle of the blade.

Below is how I set the sharpening angle.

Angle.jpg


In this example, I need to set the stone angle at 8.5 degree to have the edge (sharpening) angle at 15 DPS.
In your case, you zeroed your cube on the stage, so you need to account for the primary bevel angle.

Full guide FYI:
https://www.bladeforums.com/threads/edge-pro-sharpening-tips-mistakes-and-lessons-learned.1771733/
 
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