Someone posted in a thread showing a magnetic thickness checker that uses a small steel ball on the opposite side. I cant find the thread. I wanted to research the device. Any help?
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Magnetic Thickness Gauge
- Thread starter Doug Freeman
- Start date
Saw this in the journal
www.spexor.it
Home | SpeXor Measuring Tool
Spexor misura dello spessore del legno.Spexor is a magnetic system used in woodturning to measure thickness.
www.spexor.it
Couldn't find pricing but and interesting idea.
Doug, if you get one and try it out, would you post on here an explanation of how it works?
Looked it up on Pat Carroll's website. I placed it in the order box. Price came up as 270 Euros. Have no idea of the shipping costs.
Being an instrument builder, I'm quite familiar with these. The older version (what I have) is called a Hacklinger Guage. It's a magnetic/mechanical device. Not sure if it's still available, but a few years ago they were a bit north of $200. There's an electronic version called the Magic Probe. It's a bit more than the Hacklinger Guage, but not rediculously so.
Absolutely… but dont hold your breath. At north of $200 I wont be participating. I will research it to understand it better. I have many calipers that work well, and an excellent bottom thickness gauge using a laser that I cobbled together, so I have better uses for that kind of $. The use of the technology in this application is interesting.
Would the different wood densities give one a different reading?
No. They use a hall effect sensor that uses the magnetic field change caused by the distance the rare earth magnet is located (the ball in this case). Any non magnetic material can be checked.