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power reversion

daniele.marzocchini

power reversion
March 11, 2015 01:25PM

Registered: 11 years ago
Posts: 36

I made a serious error of distraction I reversed the poles supply (+/-), I can retrieve my Ramps, what it is burned? Can anyone help me
thank you

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dc42

Re: power reversion
March 11, 2015 02:00PM

Registered: 11 years ago
Posts: 14,686

I'm sorry to hear of your misfortune. Assuming you reversed the main 12V input and not just the heated bed input, my guess is that all the electrolytic capacitors on the 12V rail are fried, and so are any stepper drivers that were plugged into the board at the time.

Large delta printer [miscsolutions.wordpress.com], E3D tool changer, Robotdigg SCARA printer, Crane Quad and Ormerod

Disclosure: I design Duet electronics and work on RepRapFirmware, [duet3d.com].

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AndrewBCN

Re: power reversion
March 11, 2015 08:57PM

Registered: 10 years ago
Posts: 977

and possibly the Arduino too...

Unfortunately there is no reverse voltage protection on the RAMPS board. Sorry to say so, but basically you can throw out whatever was plugged into the RAMPS and restart from zero.

Edited 1 time(s). Last edit at 03/11/2015 08:58PM by AndrewBCN.

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daniele.marzocchini

Re: power reversion
March 12, 2015 05:52AM

Registered: 11 years ago
Posts: 36

Thanks,, I've already tried the Arduino Mega and load the Blink example and it works. Now I'll try to see the drivers if they work. To exclude what are the problems?

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Dust

Re: power reversion
March 12, 2015 11:05PM

Admin
Registered: 14 years ago
Posts: 7,216

there is primitive reverse protection... thats what d2 is all about.

So check that d2 is not a short. D2 tends to die when you do this...