About the CNC software and connection with computer, now Mini CNC routers made by ChinaCNCzone such as CNC 6040, CNC 6090 have mainly below different selections: 

First, Mach3 software and parallel port connection with desktop: this is the method that most hobby CNC routers are using as far as now. And after you connect your mini CNC router to desktop by the 25 pin parallel port, then set the parameters through Mach3 software on the desktop to realize the functions you need. 

Second, USB CNC software and connect with notebook by USB interface: now our CNC 3040, CNC 6040, CNC 6090 are also having USB interface for your selection, and the price are competitive, if you select USB interface, you can only use the USB CNC software. and if you want to use mach3 software, you have to connect with you desktop by 25pin parallel port as above mentioned first.

Third, desktop CNC router with Mach3 USB controller, use the Mach3 software and connect with notebook by USB interface.at the same time: Now ChinaCNCzone added this new selection for customers, and as far as now, only our CNC 6040 and CNC 6090 can realize this function, because the cost of adding the mach3 USB controller much higher, so the cost of them are a little higher then the above two ones. 

And some customers asked us, why the mini CNC machine from us can not use mach 3 software by USB interface, just because the one you select can only support USB software by USB interface, if you want to use mach 3 software, you still need to connect your mini CNC router to desktop with 25pin parallel port.

So before buying, please kindly make sure what kinds exactly you need? Our sales team will keep you informed that the different cost for your selection.