absolutely agree this is the first profile i am trying to design, which would be closest to a pump machine that i use now with a declining pressure profile of spring I plan on making other interchangeable mechanisms that would do other profiles as well, linear spring, lower pressure, etc as an engineer, we like to overthink and overcomplicate a

The gauge is stuck at 7 Bar. But otherwise moves when I use it. You think that is its new or current "0"? If all I have to do is move the needle, then fine. I just assumed something would be stuck inside the mechanics somewhere. I can't get the damn face off the gauge

Adjusting the grinder while it is running avoids going too far compressing grinds still sticking to the burrs and stalling the motor. Your grinder dial may not be calibrated to a burr chirping zero point. With clean, running burrs you should be able to readjust your dial to zero at the chirp