I’m having some weird problems with my ramps board. I think it might be fried and there’s two things I did that could have done that 1. Plug it the power supply with the wrong polarities 2. Start it up with a few of the mega pins touch a piece of metal. I tested and know the mega is fine and the ramps is getting 12.5 v but when I turn it on neither the ramps or mega light up and neither does the LCD. The mega only connects to the computer when disconnected. The ramps worked earlier after I did those two things mentioned earlier. Oddly, sometimes flashed the LCD in and off and the mega would sis nnect ever time a limit switch was hit. Then I noticed some of the puns weren’t connected to the arduino and connected them and it hasn’t worked since. There’s so many variables I have no idea what to think. Is my ramps fried?
Best guess. Probably fried a component on the board.
Is there an easy way to tell?
Turns out my power supply that came with actually outputs 30amps, if the board isn’t fried, what should I do with 30amps?
I found a 5a power supply and know that the board is fine but now I need to get a 5a power supply from a 30a one. Any ideas?
Over Amps is not the problem. It will only draw what it needs upto the max the supply can provide.
I see
Judging by all the different potential errors you say you made while having the boards powered/attempting to operate, I think it’s safe to say that you’ve definitely fried/damaged something…
Are you saying you tested with a 5A @ 12V supply and everything works?
Parts of the Arduino and LCD might be fried, even if the Arduino seems to work “fine”. It’s probably better to scrap them and start over with new parts than trying to fix them and running into unexpected issues down the road with the faulty parts.
There is not much on the Ramps itself that could break, but you might need new stepper drivers as well.
Spares… always have spares.
Also, just make sure that your stepper drivers are in the right orientation. That can do some funky stuff too!
Tom is right. The ramps is more of an expansion board with traces than anything else. It has a couple fuses and capacitors but nothing that I could see breaking. The most damage I did to them was mess up a layer and have my endstop stop working
Good reasons to have spares. Makes it a lot easier to troubleshoot.
This might be psu problem, if you mount your psu to a frame bolted, the bolt are the culprit, it’s dangerous and have caused my friend usb cable literally catch fire, unbolting the psu solved it, fyi: it has the same sympthoms
@Aria_C_Bramanta If that happened, I throw that power supply in the trash. That would indicate that it was not grounded properly or the ground plug was not connected properly.
I’ve blown my 5v twice because of that
@Keith_Applegarth but not all psu are created the same, we don’t have expensive psu over here (warranty and all) doubtfully compliant to some safety measures, but computer psu is better, at least the warranty is usable
I see
That’s how most 3d printer fires start. Bad electrical connections.