The working principle of the digital caliper is so mysterious, we never thought about dismantling it, let alone improving it, right?Well, think again, because [Limi DIY] Refit the processing elements to a custom track, Extend the caliper measurement distance to an astonishing 650 mm. Combining with the previous project of extracting measurement data, the result can be made into a working multi-axis digital reader, which is a convenient device suitable for machine tools such as manual lathes or milling machines.
The working principle of a digital caliper is to measure a variable capacitor array.If we scratch our heads and look back at our Physical notes, We will remember that the capacitance between two parallel conductive plates is linearly proportional to the surface area. By fixing one size of two boards and sliding one board to the other, we effectively changed the area and gave ourselves a simple linear displacement sensor! (There are also some classic error correction techniques, which [PDF] It’s a good place to find more details. )
The theoretical point is that this parallel plate array can be directly embedded in a printed circuit board. We only need to know the size. After some close measurement work, [Limi DIY] The key measurement values were extracted and a PCB was made with a pattern reproduced over 650 mm. After retrofitting the original processing element to this new track, they have a working measuring device that is much longer than the original one!
If you ever wanted to disassemble the calipers, but were too nervous to refuse to invest, now is your chance to follow [Lima DIY] Demonstrate the process of free disassembly in video format.The fruits of their labor are also captured in a Project position If you want to do the same thing, which includes key dimensions.
If you are looking for other ways to improve your calipers, why not start by drastically extending battery life.
thanks [absd] pass [Jubilee Discord] tip!