I purchased a 6040 4 axis CNC Router milling engraver from China. I'm using mach3 software which is a really cool program. The program is setup in inches.I tried the road runner example that comes with Mach3 and the first thing I noticed was that the engraving came out about an 1/8the size of what it was supposed to be. I recently purchased Vcarve, another awesome program, and using one of there programs I had the same result. The controller that came with the router is unlike anything I can find on the Internet and the manual that came with it only covers the assembly of the router itself. It has an LED display and some adjustments that you can do but I have no idea what they are. I'm thinking that since it is routing the way it is with two different programs that the controller maybe the problem. It has "jd inverter" written on it. Has anyone ran into this or have any idea what it could be. I would appreciate any help I can get.