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Ordered PCBs for v.2

A project log for μ3D: RatRig V-Core 3 EVA wiring over RJ45

A daughter board that mounts on a 3D printer hotend assembly to enable all wiring over RJ45

Alexander WilliamsAlexander Williams 10/25/2021 at 11:410 Comments

I've made a production order for v.2 PCBs. They'll be available for purchase on Tindie as soon as I receive them.

The thermal tests are mostly complete. Essentially I wanted to confirm if the 3mm PCB traces can handle a 50W hotend heater: they can with no temperature increase @ 2A/24V.

Based on some calculations, with a conservative 5deg C temperature rise, one trace should handle at most 3.9A but since I doubled the traces on both sides of the PCB, it could handle possibly 7.8A, however that's extremely theoretical and I would caution against more than 5A. I haven't tested with that much current so it's at your own risk.

Moreover, it's probably a good idea to fuse the cables to be extra safe.

Here's a view of the final front and back of the PCB:

A few things to note:

Stay tuned for the next update within a week or two.

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