Hello! I received a mars 2 pro as a gift about two weeks ago, everything was fine until tonight when i decided to print a new mini after the system set for about 2 days without printing and i hear this almost like a grinding noise from the z axis as it prints. I have attached a video from drop box and hope someone can help me pinpoint what that noise is and how to fix it....I don’t know how to compress the video to fit within the limitations of the message board. But any help would be appreciated. For a description the z axis, makes a grinding sound just before it lifts, it only does this at the bottom, near the home position. I don’t know what is causing it i have cleaned and lubricated the z axis. Thank you for any help.
https://www.dropbox.com/s/rebd9bpyz5fhhc...M.mov?dl=0
https://www.dropbox.com/s/rebd9bpyz5fhhc...M.mov?dl=0