Bad fan boards can cook the m12 controller boards

tetrabiodistributed / papra-pcba

Printed Circuit Board Assembly (PCBA) for the PAPPRa m12 controller

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Bad fan boards can cook the m12 controller boards #36

Closed mechatroniks-git closed 3 years ago

mechatroniks-git commented 3 years ago

When testing a "bad" fan board, multiple m12 v2 controller boards and a Milwaukee m12 charger were all rendered nonfunctional once power was applied to the system when testing a fan.

mmroden commented 3 years ago

Should be solved by the 0.3 board

mmroden commented 3 years ago

Now will be solved by not having a fan board

mechatroniks-git commented 3 years ago

Possible bad wiring in fan box (dead short on fan power wiring or in fan itself) can cause same issue. PCB V3+ should protect.

mechatroniks-git commented 3 years ago

Added 1A fuse on 12V to DC blower, tested with dead short on fan output, board survived and is fully functional once short is removed. Recommend adding 2nd fuse to DC blower on v.5 PCB, so board should have 2 fuses in parallel, one for DC blower, one for everything else.

mechatroniks-git commented 3 years ago

mmroden commented 3 years ago

Closed by #43

mmroden commented 3 years ago

closed by #49