This is the CNC router that I’ve been working on for the last two months; the first one I’ve ever worked on. It’s a 4×8 PRT Alpha from Shopbot, and we bought it used, which means that it’s the older model, but it did come all wired up. That means that we got it up and running quickly, but it also means that I don’t really know what I’m doing when I have to find a wiring issue. If I’d wired all the connections from scratch, I might actually remember what things are. As it is, I find that I have to talk to tech support about once a week.
All in all, I’m pretty happy with this machine. In function, price, and capability, it sits somewhere between a DIY hobbyist tool and full-fledged production machine. It’s cheap (for what it is), and you are expected to be pretty handy with a multimeter and machine code to keep it working (I am not handy with these things). There is no hand-holding or helpful software wizards or internal digital diagnostic checks on this machine. On the other hand, it is a sturdy steel table equipped with fast and powerful stepper motors and a 4hp spindle that can do a lot of serious work.
Here are a few “starting-out” lessons I’ve learned that seem really obvious in hindsight. As you might guess, these are trial and error kinda lessons: