...and be happy it's tying properly. Nothing more exasperating than a knotter that won't tie properly.
I might add that with a NH bailer, adding some weight to the trip arm (I machined a piece of steel bar that slipped over the trip arm and secured to the arm with 2 clamp screws), eliminated most of the odd sized bales. The NH trip arm is light weight and prone to jumping on rough ground if the bailer is bouncing around any, especially when the knurled feed sheave gets worn a bit.
The parts aren't all that expensive to replace and in reality, you only need to replace the knurled sheave, not the trip arm itself. The trip arm is spring loaded so the contact point between the arm and the knurled sheave is pretty constant, new on worn.
The other thing to consider is keeping an audible count of your bale slices as the machine makes a bale. You want a consistent slice all the time. I like to run 8-10 slices and I pay no attention to pto speed at all. Everything I do is by ear, not input speed. That may or may not work for you. All depends on your pto input horsepower. In my case, I'm never running at rated pto speed, always less, but then I have an abundance of pto horsepower anyway.
