Power Outage Protection

thingiverse

This device safeguards 3D printers from power outages, preventing the printer from restarting when electricity returns. A personal experience involved printing via a laptop; during a blackout, the Arduino was powered by the laptop, but upon restored power, the extruder switched on without pushing filament, ruining a J-Head and necessitating replacement. Upon applying power, depress the push button for output activation. Building this device requires caution as it handles 16A per printer, risking fire with improper assembly or incorrect components. It can manage only one device at a time; upgrading for dual printers demands replacing wiring gauge, relay, switches, etc. Designing and printing a case is unnecessary due to its low value; a cheap alternative costs less than $5. The Bill of Materials includes a car relay (NVF4-4C-Z30A-12VDC), bolt/nut, four/two posts terminals [CONN2/CONN1], switch with 12VDC light [S3/GL1], push button (normally open) [S1], 12VDC light [GL2], printer selector switch [S2], resistors [R1/R2/R3], solderless terminals, and 6 feet of 12 AWG wire. The Hammond case is a 1591XXSSFLBK model; resistors are optional if using a 13.8VDC power supply.