As all we know, for a cnc router, we normally have two types of controller–one is PCI card type and the other is DSP handle type.
See Redsail mini router RS-3636, we use PCI card for it for quite long time; but its quite complicated because now people prefer USB for router working now. They think its convenient. Then if we have USB, why do we need PCI?
Everything has its good and bad side. DSP handle is convenient,but USB memory has limit memory, and so does the handle. So it will be very slow if we import a large file for big cnc router design. And its easy for PCI card.
But PCI card means you also need another software to support the whole working.
So what kind of machine you want to use, depends on what kind of job you want to do.
So what do you prefer when choosing a cnc router?