Quote Originally Posted by 32t View Post
You weren't striking that fast on average.

I am surprised to see the hammer bounce as much as it does. Is that from the wood under it?
I looked again and it does seem to bounce rather a lot. Well, not a whole lot but too much. I have spring washers between the machine and the nuts, and I think those are the culprit. It doesn't seem to come progressively loose, so I think it is resonating within the margin of the washers. I'm going to try and a) tighten them to remove the springiness, or b) remove them completely and see if the nuts will stay in place with those nylon bushings alone.

This is one of the reasons that I benefit from those videos. It allows me to look in detail at what's going on without tunnel vision.