I recently killed something on my ramps setup from my MPCNC. I have a Printrite DIY printer I picked up cheap. Paired with Simplify 3D it printed incredibly well, until the main board failed and a new one was like $80. After research I found that most people just switch to ramps anyway because the oem board is plagued with issues.
So I borrowed the ramps setup from my mpcnc since I didn’t have any projects lined up for it anyway. I took the firmware that most people used and modified it by using the extruder settings from Ryan’s firmware since that was the extruder I was putting on it. I didn’t feel like connecting everything when I was playing with the firmware so I just connected the LCD and power. Min temp error showed up. I figured that an easy fix to make it go away was to set it to 0 since I didn’t have anything connected. Well, it worked for a few seconds. I turned around to pick up something that I dropped and when I looked back at the ramps board it was letting out the magic smoke.
I don’t think I have ever unplugged something from my computer so quickly or violently before. Then I disconnected the main power. I’m not really sure if it was the arduino, ramps board, or both that died. As long as the stepper drivers are fine, it is super cheap to get a new arduino mega clone and ramps board.
Anyone know why changing the extruder min temp setting to 0 would cause that? Literally nothing else was plugged in (power, usb, and LCD) and the board was on a non conductive surface.