Modular Fab Stepper Driver
This is a Fab-Labbable (i.e. easy-to-pcb-mill) design for a networked stepper driver. Check the dev log for more details.
This uses the SAMD21E18 microcontroller, 2x A4950 H-Bridges to drive, and is connected to osap networked controllers using the uart-clocked bus data link, an RS-485 powered deterministic bus.
Building Fab-Step
Circuit files are available here.
BOM
I have published an online Bill of Materials, here or you can download the spreadsheet or csv.