AC Inlet Switch burnt out | VORONDesign | Page 1

tardy ridge Nov 4, 2023, 8:32 PM

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Hey all, so my well used Voron printer randomly turned off this morning while heat soaking. I wasn't in the room with it so I'm not sure if there was any magic smoke or not but now it won't turn on.

Examining the electronics bay it looks like the prongs on the inlet switch burnt out. I checked the fuse and it looked fine to me, I also looked over the PSU and the terminals there looked good as well so I am thinking this is just related to a cheap switch.

I'll attach some photos of the inlet, switch and fuse to let you guys take a look at it and let me know what you think.

My questions are:

Is there anywhere else I'd be able to check for damage in the case it's not the blown switch?
Is there anything I could have done to prevent something like this?

I'm still pretty new to the electronics side of things so any help is appreciated.

Thanks,
Jacob

wild salmon Nov 4, 2023, 9:07 PM

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I wonder if it was a bad crimp on one of those spade terminals at the back maybe 🤔

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and I don't think you really could have prevented it

tardy ridge Nov 4, 2023, 9:54 PM

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That makes sense. These came as part of a kit so I'm sure the quality isn't the best.

I've ordered the one recommended in the BOM and I'll hope nothing was damaged. If anyone else has any suggestions let me know if not I'll close this thread tonight

urban cloud Nov 4, 2023, 9:55 PM

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I’ve had this exact same issue. My switch burnt out on mine. Wasn’t actually rated for the continuous current that was going though it. Solution was to use the BOM switch and inlet plug

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tardy ridge Nov 4, 2023, 11:04 PM

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urban cloud I’ve had this exact same issue. My switch burnt out on mine. Wasn’t actually rat...

Oh wow yeah that looks pretty bad! Thanks for confirming what I thought. I'll go ahead and mark this resolved!

near falcon Nov 4, 2023, 11:23 PM

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Out of curiosity what kit is that from?
Formbot kit contains inlet and the switch as separated parts.

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At least both of kits I've got.

urban cloud Nov 4, 2023, 11:48 PM

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Mine was just a generic switch off Amazon, said it was rated for 10A, but in reality it’s 6.3 for the switch, and 10A for the Nema plug

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Add a 750W heater and 3 power supplies to it, and it lets the magic smoke out

tardy ridge Nov 5, 2023, 12:46 AM

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near falcon Out of curiosity what kit is that from? Formbot kit contains inlet and the switc...

The Fysetc Rev 1.1. I believe the switch and inlet were all one preassembled unit with the wires Preterminated. I know there's been a few revisions since then so there's a good chance it's changed already

left seal Nov 5, 2023, 2:16 AM

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the built in switch on cheap inlets like those melting has been known to be an issue for a long time, that's why PIF only supports the version with separate switch and inlet

tardy ridge Nov 7, 2023, 4:32 PM

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@wild salmon @left seal @urban cloud @near falcon

Hey all, just wanted to say thanks for the help. I replaced the switch with the BOM one and the printer is up and running again! You guys are awesome

wild salmon Nov 7, 2023, 5:06 PM

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Nice

#AC Inlet Switch burnt out