I've got a new Chinese USB 6040 engraver, 1500 watt, 110 volt with a Nowforever VFD that I need assistance with. The seller states it will work with Mach3 as-is, but the stepper motors have never moved. We've checked for wiring issues, shorts, fuses, etc. and all is good. Mach3 functions fine if installed with the parallel port driver, even though it is not needed, but it will not work without it (we have tried uninstalls/reinstalls both directly from Mach3 and from the website the seller referred us to). The computer to controller connection is USB only - no parallel ports. The seller did not provide manuals, software, etc. They have referred us to China Desktop CNC, Hobby CNC, Mini CNC Router Machine Manufacturer/Factory/Supplier--ChinaCNCzone for the manuals and "their" USB controller software. We installed their USB controller software but they won't provide the required license so we aren't going down that path. We've set up Mach3 per the chinacnczone manuals, a Mach3 CNC training tutorial 1-5 I found on youtube and the ABC's of Y00CNC 6040Z Setup, all without success. We have been unable to find any instructions for the USB only setup or trouble-shooting - everything appears to be for USB to parallel port connections. Does anyone have any suggestions on how to get this thing to work?