Vernier calipers

I've seen quite a few caliper designs online, but none of them are very good or accurate enough, so I'm going to make a refined caliper. The accuracy is 0.2, the measuring range is 150mm, the embossed numerals are more refined, it has a hand guide wheel for more convenient control, it has a depth gauge, and after installation, it has a travel limit and is not easy to fall out. Note that the depth groove position does not need support, the assembly video is on the print real shooting.

Online to see a lot of caliper works, are not very good accuracy is not enough, then I will do a delicate caliper, accuracy 0.2, measuring range 150mm, more refined figure, with a hand guide wheel control accuracy is more convenient, with the depth of the ruler, installed after the travel limit, not easy to fall out, pay attention to the depth of the groove position without support, assembly video on the print real shooting.

.