With my recently acquired, used X1C, I cannot turn off the chamber fan. The chamber fan runs constantly at 90%, even without starting a print. As soon as I flip the switch at the back, it starts running and is really loud. I have tried to turn off the fan via the touch display and also through Bambu Studio, but then the display immediately jumps back to 90% and the fan does not respond.
Can someone help me with this problem? Could it be related to the G-code settings? These are only relevant for an active print, right?
It sounds like the PWM output to the fan is blown. These fans will run at full speed when the pwm input to the fan is held high or low depending on the type of fan. It needs a pulsing input to set the speed. The reason you are seeing 90% on the display is because the main board is reading the tacho output signal of the fan. I doubt it’s a problem with the fan, more likely you’lll need to replace this board https://au.store.bambulab.com/products/mc-board-x1-series.
I am really sorry. Unfortunately, I hadn’t found the section for German yet. Here is the translation:
Hello everyone,
With my recently acquired, used X1C, I cannot turn off the chamber fan. The chamber fan runs constantly at 90%, even without starting a print. As soon as I flip the switch at the back, it starts running and is really loud. I have tried to turn off the fan via the touch display and also through Bambu Studio, but then the display immediately jumps back to 90% and the fan does not respond.
Can someone help me with this problem? Could it be related to the G-code settings? These are only relevant for an active print, right?
if your X1C is new and under the EU 2 year warranty, you may request Bambu to replace the defective board with a new one. You can open a ticket with Bambu customer support and provide them with all supporting evidence of your machine malfunction, including logs, videos and other supporting stuff. Be prepared for a longer (or shorter) back and forth, getting standardized replays (that usually have no relevance to your problem) and try escalating your problem past their answering robot, to a real person. Theoretically, though exceptions might pop-up, I haven’t heard from any of their EU based clients to have had real issues with getting replacement parts while under warranty, except for longer delays in the delivery of those replacement parts. Good luck and keep us updated on how it went.
Later edit:
You might want to start stockpiling spares for your printer, starting with those classified as “consumables”, and going through each and every bit of spares made available in their webshop.
I replaced the circuit board, but unfortunately, this did not lead to success. So, I ordered a new fan and then replaced it. This solved the problem. The fan was defective.