Hi there, I know Arduino gets 12V through RAMPS and in Arduino it goes through 5V regulator and powers on the Arduino. I know about frying the 5V regulator on Arduino. I have fried mine and replaced it with 7805. I'm printing from SD. i just saw Arduino reset itself during warming up. The screen went blank and displayed Marlin boot screen. So, Is there anything else on the voltage path between RAMPS and Arduino that might black out for a moment and reset Arduino/Marlin? I just got a new RAMPS and it was a cheapo. I'm suspecting it, but will not rule out PSU problem or Arduino problem. I'm mentally prepared to replace some parts from the RAMPS, because cheap chinese shit. :) Currently my printer is running under load and seems stable. I'm printing some molds to make silicone damping thingies for heatbed. It might be a firmware issue? I'm still running RC6. https://reprap.org/forum/read.php?219,717888,717888#msg-717888 Wed, 17 Jun 2026 16:14:34 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?219,717888,717993#msg-717993 https://reprap.org/forum/read.php?219,717888,717993#msg-717993 frankvdh RAMPS Electronics Fri, 28 Oct 2016 15:24:55 -0400 https://reprap.org/forum/read.php?219,717888,717923#msg-717923 https://reprap.org/forum/read.php?219,717888,717923#msg-717923 polyfuses!

Those polyfuses are pain from the experience. I have 2X40mm fans to cool RAMPS, but of course this new RAMPS and new polyfuses might not be happy with it.
I will jump those when/if this problem starts happening during print. Moving the fuses near PSU was my long term plan anyway.]]> Veesta RAMPS Electronics Fri, 28 Oct 2016 07:58:26 -0400 https://reprap.org/forum/read.php?219,717888,717918#msg-717918 https://reprap.org/forum/read.php?219,717888,717918#msg-717918
I've seen really cheap ones that are just not 'right' If if doubt remove the polyfuse and put a large wire in its place.
Now put a inline fuse into the wire from the power supply to the ramps. (dont run without a fuse)]]> Dust RAMPS Electronics Fri, 28 Oct 2016 07:36:31 -0400 https://reprap.org/forum/read.php?219,717888,717888#msg-717888 https://reprap.org/forum/read.php?219,717888,717888#msg-717888
I know Arduino gets 12V through RAMPS and in Arduino it goes through 5V regulator and powers on the Arduino.
I know about frying the 5V regulator on Arduino. I have fried mine and replaced it with 7805.
I'm printing from SD.

i just saw Arduino reset itself during warming up. The screen went blank and displayed Marlin boot screen.

So, Is there anything else on the voltage path between RAMPS and Arduino that might black out for a moment and reset Arduino/Marlin?

I just got a new RAMPS and it was a cheapo. I'm suspecting it, but will not rule out PSU problem or Arduino problem.
I'm mentally prepared to replace some parts from the RAMPS, because cheap chinese shit. :)

Currently my printer is running under load and seems stable.
I'm printing some molds to make silicone damping thingies for heatbed.

It might be a firmware issue? I'm still running RC6.]]> Veesta RAMPS Electronics Fri, 28 Oct 2016 06:20:16 -0400