Tool changing 3D printers are hot. The idea is that instead of switching filament, you swap out hot ends or other tools. That isn’t a new idea. However, most tool changers are expensive. [Engineers ...

This month, the 3D printing community has seen the announcement of four different tool-changing FDM printers. First was Snapmaker’s U1, a machine we received for review while still in beta testing.

3D printing’s real value is that you can whip up objects in all kinds of whacky geometries with a minimum of fuss. However, there’s almost always some post-processing to do. Like many manufactured ...