Just a little heads up. As I was writing the PM sheets for our machines today, I found a somewhat hidden air filter. You must remove a rectangle cover with 4 button head cap screws to get to the filter for the axis drives. Its located on the back of the machine about eye level, approx 10 X 12. Ours are pretty new, so no big deal, but when was the last time if ever you checked yours ?
Better go look !