Originally Posted by
robtown
There’s quite a few factors outside of the machine itself that determine how perfectly a 3D carve can go. Material and heat/humidity are two biggies that come to mind.
As for the machine, I just posted some 3D stuff that my old 2004 PRT (not alpha) can do in my “Big Blue” thread.
I built a centroid based controller for it a few years ago, but used the gecko drives that were used in the prt 4g upgrade controller Shopbot offered a few years ago, and I bought some newer (Shopbot, used) steppers for my x axis off the forum here. I reused all the original Shopbot cables and proximity sensors and stuff.