I am in the middle of a cutting project and the laser no longer focuses. The laser bangs into my work piece and it also bangs at the top of of its travel. I completed three large pieces and it worked fine . I was using the recommended settings for the project (100/15) and it stopped because it recognized  a flame, There was no flame. I restarted them\ process with (65/%) settings and it did run but was not focused. I even reset the  focus