SwingT wrote:I am doing a "wobbling" rotating tamp similar to the video, slightly more wobble maybe, but quite similar to the video.
Well, so the dictionary says about precession: "a gyration of the rotational axis of a spinning body about another line intersecting it so as to describe a cone" to make it a bit more clear. This is the motion I believe is seen in the video and describing above as "wobble"another_jim wrote:precession is 2D physics, the simple rotation of the axes of an elliptical orbit; while nutation is 3D analytical geometry, the motion of a tilted annulus touching a plane at one point and having its axis describe a circle parallel to that plane. This motion will inscribe a circle on said plane whose radius is the cosine of the tilt angle times the radius of the annulus.
However, this is NOT what I meant when I said "wobble." Instead, I am referring to fluctuation in the degree of precession, so that rather than describing a circle projected upon a plane, one would describe a cogwheel sort of shape. This "wobble" is nutation.
I have no problem with the phrase nutating tamp, but I want to be clear on what we are all doing. I think if it is done properly it is a fast reliable way of leveling the puck. If done improperly it can lead to channeling and even crack or dislodge your puck.