Hi everybody,
After a lot of readying finally my first question on this forum. I have build my own reprap 3D printer based on the delta-pi with some modifications. A couple of days ago I finished the hardware and I am actually quite pleased with the result so far. I just have one problem. When I turn on the printer, the PSU cuts out, with what looks like some safety feature.
After disconnecting some components, it turns out the PSU has enough power for the basic electronics (RAMPS 1.4, mega 2560, display, three small fans) and the stepper motors tuned down to about 25%. When I tune the stepper motors higher than 25%, or when I connect the hotend or heated bed, the PSU cuts out. When I then disconnect the hotend and the heated bed and restart the PSU, it works again...
The PSU I used is an ATX version I modified using the manual on this site. I used the 4-pin molex connector (that originally is meant for the CPU) to power the electronics. It should have enough amps for the printer (see attachment).
[attachment 23529 foto.JPG].
I have three questions I hope you can help me answer.
I know the PSU might be a little low-powered, but I would expect it to at least power the hotend and the electronics. At this point I'm stuck on options except for buying another PSU, but those cost money and the budget is tight... So any help is welcome!
After a lot of readying finally my first question on this forum. I have build my own reprap 3D printer based on the delta-pi with some modifications. A couple of days ago I finished the hardware and I am actually quite pleased with the result so far. I just have one problem. When I turn on the printer, the PSU cuts out, with what looks like some safety feature.
After disconnecting some components, it turns out the PSU has enough power for the basic electronics (RAMPS 1.4, mega 2560, display, three small fans) and the stepper motors tuned down to about 25%. When I tune the stepper motors higher than 25%, or when I connect the hotend or heated bed, the PSU cuts out. When I then disconnect the hotend and the heated bed and restart the PSU, it works again...
The PSU I used is an ATX version I modified using the manual on this site. I used the 4-pin molex connector (that originally is meant for the CPU) to power the electronics. It should have enough amps for the printer (see attachment).
[attachment 23529 foto.JPG].
I have three questions I hope you can help me answer.
- I know I have to draw power from the 5v extension in order to get power to the 12V extension. For this I used a 12V 25W halogen light bulb on the 5V extension. Is this enough or should I draw more power from the 5V extension?
- Do I need to use another connection than the 4-pin molex connector to power the electronics? This regarding the rail 1/rail 2 power from the PSU? And if so, how should I connect it?
- Or do I just have a bad (low quality) PSU that I need to replace? I have read this is quite common... And if so, what should I look for in a replacement PSU?
I know the PSU might be a little low-powered, but I would expect it to at least power the hotend and the electronics. At this point I'm stuck on options except for buying another PSU, but those cost money and the budget is tight... So any help is welcome!