don’t know if these two issues are related or not, but my left nozzle is acting up.
Last week the automatic axis calibration stopped working. I don’t know why. It just stopped, and required manual calibration.
Last night the left nozzle started complaining that the filament would run out even though it was loaded correctly. I unloaded the filament, and found some plastic melted around the heating block where on some previous print, the model came loose and the head ended up crashing into it and melting it.
I removed and cleaned the nozzle the best I could, but now the left nozzle won’t retract when switching to the right nozzle. Is this tool head busted now?
Now that I think about it, this is probably why some of the prints have really bad texture when off to the sides of the bed. The nozzle isn’t moving to level the bed.
Your video is not loading for me, but I had the same issue with the filament runout sensor and had to disable it via gcode. Pretty sure in my case the lever for the limit switch got messed up, but I haven’t taken it apart to confirm yet.
Regarding your second issue, the left nozzle does not move when switching to the right nozzle. At least on my machine it remains stationary while the right moves up and down.
Disabling the runout sensor seems like a very bad idea. There’s some instructions about taking the tool head apart and adjusting the switch inside it, but it’s for a different model. Maybe the solution is similar. I guess I’m going to have to try taking it apart.
In my opinion filament runout sensors are mostly useless considering pretty much all filament manufacturers dogleg the end of the filament making it impossible for it to ever reach the runout sensor and as long as you can monitor the machine it’s not too hard to pause and reload at the right time.
If you take it apart let me know how it goes and how easy it is to access the switches.