I first got into cnc machines by buying the redleaf system from buildyourcnc.com. However, I'm now needing an electronics setup that is usb compatible. I came across the cbeam build video from open builds: ...and I can't wrap my head around how he is operating the cbeam machine without stepper motor driver's!?! Can someone please explain when the use of drivers is necessary? All I've ever known is that drivers are necessary because that's all I've ever used (redleaf systems come standard with drivers The redLeaf CNC Electronics and Computer Plug-and-Play System ) Also, while we're discussing this video...can anyone provide the link to the laptop he's using in the video?