Greetings all, I am new to your forum and I want to first say thanks for all of the Ideas. I have recently purchased a M500 Chinese Laser and am having some trouble. I purchased it off of Ebay brand new with supposed guarantees and support but I am afraid I may have made a mistake. I have tried to set up some support but it has not worked out yet and now the Chinese are on a "holiday" for the next week and I don't really want to wait that long. I am familiar with Laser systems. I recently sold an LMI (now Preco) engraving laser and work with large cutting lasers all day at my Day job. Anyway, I have everything set up, The beam aligned and it works for vector cutting. When I try to Raster I just get a bunch of random dots and usually outside of the area it is supposed to engrave. I push the test button and it "dry runs" a rectangle around the area correctly but when I run it all I get are random dots. Also I have noticed when I push the "Datum" button the laser head moves to the upper right corner. The limit switch for the Y-axis is on the upper side so that works correctly but the limit switch for the x-axis is on the left side but the head move to the right hits the hard stop and keeps trying to run until I push "stop". I don't know if these are related but I am stumped. Any Ideas out there? If someone could help it would be greatly appreciated.