I hate to be the bearer of bad news, but the K40 machine is just a mm or so away from being junk. Some people have got them to work, and others have spent hundreds of dollars and they still are not happy. IF you can send it back, and receive a refund go for it. Then save your money up, Automation Tech out of Chicago and LightObject out of Sacramento sell some good lower cost machines. I got one from LightObject and I was using it just today to do a project for my wife. Works great and its a true 40 watt machine. I just arrived Tuesday but I have been using lasers since late 2013.