3G 5D Mini

Add a reliable stepper extruder to your original MakerBot Cupcake using this little board.

This board adds a fourth stepper channel to the original RepRap Gen3 electronics by repurposing one endstop pin from each axis. It's software-compatible with Tinkerings' original 3G 5D Shield, so it works with firmware available through RepG. No hacks required.

Unlike the original, the Mini doesn't break out separate endstop connectors, or provide ANDing of endstops. But fear not! Endstops still