Hi Bobc, as far as I know, it doesn't matter with AC current. You can have live and neutral connected anyway you want (you can plug it in turned 180°) as long as ground is connected to ground. My power sockets aren't misswired, I power computer and everything else from same power outlet multiplier. Thing is, it worked with the same power outlet, then it didn't work and now it "works" again (at lby madmito - RAMPS Electronics
Thin wires soldered, connected ramps to 12V, connected arduino to USB, nothing happened, no smoke no whatever..... Gonna wait for new Arduino's and test again.by madmito - RAMPS Electronics
I tried to establish contact between arudino and the computer, without ramps connected. 1. board dead (I guess, USB controller is completly dead, ATmega alive, but no help) 2. board, can be found by windows, but no programing of ATmega.(I guess it can be helped) gonna try and solder a very thin wire instead of a fuse and see what happens, just wanna prevent fatal injuries to my soon to arrive neby madmito - RAMPS Electronics
What do you mean USB ground pin ? As far as I know, where the fuse was blown is where USB ground touches USB on Arduino ? This is what I measured: (all of it) Should I measure anything else ? If it is about zero ohm, can I just use a very thin wire ? BTW really thank you for all your help, I'm an architect, so I'm really not knowledgable about electronicsby madmito - RAMPS Electronics
They are both blown, one fell off and I desoldered second one, if we think of the same thing. (both are small black SMD elements, so badly damaged, I can't read anything of them) Here's the photo of where the damaged parts were. On first controller that is totaly dead, even the printed circuit board on Arduino got damaged (on second try, the next day, without the fuse), I think more than coupleby madmito - RAMPS Electronics
ShadowRam Wrote: ------------------------------------------------------- > connected ramps to power outlet > > Provide picture please of your power supply and > how it is connected to the RAMPS board. > > endstops(two wires only) where connected. > > Picture of these plugged in as well please. Thanks for your reply, this is how it is connected. I don't have the sby madmito - RAMPS Electronics
redreprap Wrote: ------------------------------------------------------- > to find out, use a volt meter, measure the ground > to ground voltage -USB to GND. where there is a > voltage difference, it is effectively shorting 1 > power supply to the other when you "short" or > connect the 2 "grounds" together via the USB. > > most likely, the VSS supply is not a real positivby madmito - RAMPS Electronics
Hi I'm building a delta 3D printer. Electronics are 2 kits from gadgets3d.com bought on ebay.(arduino mega, ramps 1.4, sdramps, G3D drivers.....) Power supply is 12V 30A, switching... I tested tested the motors couple of weeks ago, everything fine. So I guess, this far everything was connected correctly. On saturday evening, I put everything in the printer, connected ramps to power outlet anby madmito - RAMPS Electronics