HynaBoard for controlling the vacuum. It has 2 outputs for SSR (230V prevacuum pump, 230V prevacuum pump valve), 2 outputs for vent valves, inputs from pirrani and CCG gauges and port for TMP controller.
Vacuum controller
A project log for Metal 3D printer
Making an electron gun is a first stage of my future plans - to make DIY electron microscope/EBM metal 3D printer.
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