+- The BESS Exchange is sponsored by Edge On Up (http://bessex.com/forum)
+-- Forum: BESS Forums (http://bessex.com/forum/forumdisplay.php?fid=1)
+--- Forum: Relevant General Discussion (http://bessex.com/forum/forumdisplay.php?fid=19)
+--- Thread: Gritomatic Goniometer (/showthread.php?tid=524)
RE: Gritomatic Goniometer - chino - 02-27-2020
Looking forward to a review of the gritomatic
RE: Gritomatic Goniometer - CasePeanut - 02-29-2020
Would the Goniometer work on a scissor blade?
RE: Gritomatic Goniometer - grepper - 03-01-2020
I don’t have one so this is just a guess. I think it would depend on the scissors.
It measures bevel angle up to 40°. I’ve seen scissors with angles greater than that.
Reflectivity of the bevel is important. A polished bevel will reflect light with less diffusion than a coarse ground bevel. Many scissors leave a coarse grind on at least one blade to help prevent pushing of the media being cut. I looked at all the scissors in my house and all have coarse ground bevels that would do extremely poorly at maintaining a focused laser beam when it is reflected off the bevel. I don’t know about beautician shears. All of mine are just regular scissors.
I would think that a quick check of how polished the bevels on the scissors you want to measure are would give a pretty good idea of how well it would work.
Hopefully someone who has one or a similar unit will chime in.
RE: Gritomatic Goniometer - BeSharp - 03-01-2020
Yes it does. Just measured a pair of Wiss scissors sharpened on a WSKO (55 degrees) and it shows 55 degrees. You just have to align it so the flat edge dot is at zero.
RE: Gritomatic Goniometer - CasePeanut - 03-01-2020
(03-01-2020, 10:51 AM)BeSharp Wrote: Yes it does. Just measured a pair of Wiss scissors sharpened on a WSKO (55 degrees) and it shows 55 degrees. You just have to align it so the flat edge dot is at zero.
Great to hear. Thank you!
RE: Gritomatic Goniometer - chino - 03-10-2020
FYI, he gritomatic laser edge goniometer is back up on sale. They go fast!
RE: Gritomatic Goniometer - BeSharp - 03-23-2020
[attachment=1000]
I have used the $75 USD Gritomatic (basic) goniometer for about three weeks. Gritomatic sold out their first batch. It's now back in stock. They also just introduced a Pro model for $101 USD more:
https://www.gritomatic.com/collections/essentials/products/laser-edge-goniometer-pro
TL
R: I'm happy with what it does for the price. It's one of the cheapest ones available (I just missed the cut-off for Ken Leonard's $40 USD laser edge knife reader on Kickstarter). Besides, I didn't want to wait.I run a sharpening business. I use it to give me a (rough) idea of the existing angles to set up the sharpener (I still use a Sharpie to see if it needs fine-tuning).
It works best for straight bevels. Had a ceramic knife with straight bevels and the image was crisp and clean. On the other hand, convex edges scatter the laser beam. I measured the Japanese sword in the picture, circa 1630 (as confirmed by the NBTHK Hozon paperwork). The convex edge measured about 20 degrees per side. As a side note; the BESS = 270. (I'm sure it has been sharpened since 1630!)
The goniometer is made out of plastic and looks a bit fragile, but seems well made. The fit and finish does not reflect (get it?) its $75 price. Nevertheless, I'm going to put it in a foam-cube container along with the angle block, the PT-50B, the caliper, the loupe, and the lens for the cell phone camera.
In short, highly recommended. I'm not sure if the Pro model is worth the extra $101 as I haven't used it.