To zero a dial indicator after mounting it on your CNC machine, you need to move the plunger or probe to the point or position you want to use as your reference point, then rotate the bezel or ...

A dial indicator is a device that consists of a needle, a dial, and a spring-loaded plunger. The needle moves along the dial as the plunger is pressed or released by the surface it contacts.

This compliant mechanism 3D-printed dial-free indicator is perfect for a lot of simple tasks, including the bed leveling chores that [SunShine] designed it for.

Carefully place the piston on the rod, compressing the dial indicator plunger in the process. The amount indicated on the dial indicator's face equals the piston top's thickness.