Laser Edge Goniometer Sneak peak

777 Edge

777 Edge

Dealer / Materials Provider
Joined
Sep 16, 2019
Messages
1,176
I finished another "LE" ("Leading Edge") design last week. It uses my 3D print design goniometer and a very affordable little laser pointer that slots into place in the handle. I designed a switch button to align with the laser pointer's switch when slotted in place. Even with a cheap little laser pointer, it gives very accurate results. In my last pic you can see the knife is sharpened at 15 degrees per side, and the primary blade grind is 2.5 degrees per side (excuse the upside-down angle, I had to do it with 1 hand while taking a photo :) )

I'm hoping to have these available on www.gritomatic.com ...if there is enough interest...?

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Sounds good to me. I would definitely buy on. My old protractor is falling apart.

I was wondering how you overcome the fuzzy reflections of a coarse edge, which don't present is nice clean dots.

I was also wondering about convex edges, which don't have a single angle, but a multitude of different angles that show up as a crescent reflection on the protractor scale. Is there a way to quantify the acuteness of a convex edge? And is there a way to correlate that acuteness to the performance of a V edge at a specific angle?
 
I've never heard of such a thing and now I want one. Any ideas on price?
 
Twindog said:
I was wondering how you overcome the fuzzy reflections of a coarse edge, which don't present is nice clean dots.
Click to expand...

The dots are nice and crisp on a smooth, refined and relatively polished V edge.

With a coarse V edge, there will always be scatter of the reflection of the laser beam due to it striking multiple tiny bits of steel. It creates a hazy line instead of a crisp dot but you can still get a good angle reading for the edge though, just use the approximate center of the line for the reading.

As for convex edges, I haven't played around with those yet on the goniometers.
 
Is there room to fit an 18650 driven laser, The one in your pic never lasts for more then a few session with the dog or cat, I will not buy another. Found 18650 DSK branded red laser "pointer" on the bay that still works great 2 years later and is rechargeable.
 
scottc3 said:
Is there room to fit an 18650 driven laser, The one in your pic never lasts for more then a few session with the dog or cat, I will not buy another. Found 18650 DSK branded red laser "pointer" on the bay that still works great 2 years later and is rechargeable.
Click to expand...
I can design it for any laser, just used the inexpensive little ones to try and keep the cost down as much as possible.

If I can find a different model - very affordable and widely available pointer, then I will modify the design to suit it.

The inexpensive pointers I have been trialing, have been going strong for more than a hundred tests so far.
 
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