Use a 3pin MLX connector (see the official sourcing guide) to allow your bed to be removable without disconnecting from the SSR directly. Adding Molex connectors to all stepper motors is useful. JST connnectors are not available as mid-wire connectors so they must be mixed. The recommended MicroFit 3.0 connectors are specified for up to 5A and should be used for all connections to the stepper motors, hotend and limit switches The JST connectors are used for connections to the MCU board(s). If using an AC powered bed, be sure to ground the bed regardless of if the assembly manual specifies it or not.Dont run your bed above 110☌, this reduces the lifespan of the adhesive holding it onto the build plate.Add a 115-125☌ thermal fuse to your bed heater as an additional safety measure Buy a quality SSR (see the official sourcing guide), cheap clones may overheat and fail closed causing a heater thermal runaway.Use at least 18 AWG (0.75 mm²) for mains AC wiring, even better would be 16 AWG (1.25 mm²) AC wiring should be properly dimensioned.Bad crimps are a major source of problems later on and sometimes hard to identify! Tipsĭepending on your level of expertise it may be useful to practice crimping and soldering before wiring everything up. In particular the stepper drivers can be easily damaged by connecting or disconnecting stepper motors while powered. In addition to being a safety hazard, it is very easy to damage electronic components. Never plug or unplug any device while the printer is powered. The recommendations made in here are typically out of an abundance of caution to prevent fires. Always double check to make sure your printer is unplugged and the capacitors in the power supplies have discharged before touching any wire or terminal. When wiring your printer electronics, you will be working with line voltage wiring (120V / 220V AC).
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