For shot 12, the vertical scale is 100mV/div, and the scope trigger had to be set higher, and it therefore missed the start of the hammer strike.I think the piezo discs are a little too excitable for the task at hand.
If I understand the configuration, once the hammer contacts the valve stem your recording wiper follows the motion of the hammer face until the contact if broken again.
I wonder how long after the hammer strikes the valve stem that will be?.... My guess is 0.05-0.1 mSec....
Quote from: rsterne on July 03, 2018, 12:17:08 PMI wonder how long after the hammer strikes the valve stem that will be?.... My guess is 0.05-0.1 mSec....I am going to guess twice that range