Originally Posted by
grandisleman
I have been having problems with my 100w chinese laser for over a week. All went well for the first week or two. 1st the main power switch failed. Replaced. New switch failed after an hour. Decided to jumper out DPST switch and used an external powerstrip. Began having erratic behavior, such x axis shifting while engraving a section of text, and in the middle of engraving a section of text, suddenly laser head shoots directly up (y axis),comes back to original y coordinate, and resumes. About the same time, the emergency stop switch failed. Replaced. I should mention that it also kicked a 15amp breaker in my house. It doesnt happen with every run but about 50% of the time. I had two electricians check out house wiring, and added a solid 8' copper grounding rod tied directly to machine ground lug. So far, suggestions from supplier havnt resolved problem.. I have watched while it was engraving, and when the shift in x axis occurs, I can see a quick back and forth shudder (just a few mm, then it resumes with lower part of text slightly off in x axis. This was to be my only retirement income, and Im ruining more work than I produce.. Please, any suggestions.