My best guess... 17:59 Feb 8, 2017
Although I am not personally familiar with this specific term, I am familiar with the general engineering principles of the kind of techniques being described here. I believe what it means is to move the objet in question (as relevant) very slightly and gently, in such a way as it JUST touches the other object (e.g. indicator) — then when there is relative movement between them, it will be possible to see how much the moving object has moved w.r.t. the 'fixed' reference object (and so on...). So a very light touch, for the sole puprose of positioning as close as possible... |