Noise with straight lines

The toolhead makes noise when filling the surface layers of straight lines.

Please take a look at the videos:

  1. Dropbox

  2. Dropbox - IMG_1943.MOV - Simplify your life

I completed manual bed screws adjustment several times and it does not change anything.

I removed some dirt from the X-rail, add lube. Tightened a bit more some screws. Did one more bed screws allignment. Printed again and now there no noise.