Ahh. Maybe some internal resistor was causing noise on the pin… or even the MCU.
Like trying to debug a pc issue only to find out it’s a faulty motherboard
Comment on [Troubleshooting] [LONG] Clog test write up - this time with pictures!
papalonian@lemmy.world 6 months agoThank you for asking! I have a follow-up post here detailing what the actual issue was (incorrect temp readings from the printer, hotend only reaching ~half reported temp), but the actual root of the issue remains unknown. The board seems to have been the issue, as swapping in an SKR mini has fixed it (and improved a couple other things, definitely recommend this board!), yet I still have no idea what could’ve been the problem with the other one. It was relatively new, had been working for weeks, tested completely fine on a multimeter, and even read correct temps for the heated bed when the thermistor was plugged into the hotend port.
In short, the gremlin did not move out, but I’ve bulldozed the house and built a new one around it.
SzethFriendOfNimi@lemmy.world 6 months ago
papalonian@lemmy.world 6 months ago
… So you wanna know something brilliant.
I replaced that board maybe 2 weeks ago and have been printing fine since then.
About an hour ago, the new board has replicated the problems of the previous one. Not getting hot enough but reporting target temp. It’s a completely different board from a different manufacturer, and it’s failing the exact same way as the last one.
SzethFriendOfNimi@lemmy.world 6 months ago
Wiring from the PSU to the board?
Or any kind of backfeed on the motors like when you move them by hand quickly? Which I’ve done and not, so far, fried anything but it can.
Man… Gremlins suck.
johnb48@mastodon.online 6 months ago
@papalonian
But did you change the wire between the board and the thermistor? It seems about all that's left.
@SzethFriendOfNimi
papalonian@lemmy.world 6 months ago
Someone asked this in a different post of mine, all of the thermistors I used were a single piece, meaning that replacing the thermistor replaced everything between the pins on the motherboard and the unit that goes into the hotend.