0mpilchfamily 7 years ago It can be done but requires some reworking of the commonly used controller boards. Otherwise the controller boards are wanting access to more pins then the uno can offer. But those are for added sensors and limit switches so your prints are easier set up and you can monitor the status of the whole system like the temp of the extruder head. But once you eliminate those sort of things and remove those from teh code then the sketch should be small enough to fit on the Uno. But if all you want to do is play around with 4 motors then you can get motor controllers for each individual motor and connect it all up to the uno. The sketch you'll use depends on what your objectives are for this project.