Even though the heater temperature has dropped during printing, it is still measuring a high temperature, so the heater does not operate and cools down, causing the nozzle to become clogged and printing to fail.
Also, even though the heater temperature is normal, it may detect a high temperature and issue a “nozzle temperature too hot” error.
The timing varies, and if you’re lucky, you may be able to print without any problems.
However, there seems to be a problem with the control and correction of the temperature sensor.
The bed also has a heater and sensor, but their behavior is clearly different from that of the nozzle. It seems that the nozzle sensor reading response is slow.
It seems like the problem is with the circuit, not the heater or sensor.
I suspect that the capacitor has deteriorated.
I will fix it myself, so please give me the UPBOX circuit diagram manual.
Hi, can’t find a circuit diagram but did you ever fix the problem? I just got a practically brand next upbox plus but there seems to be heating issues. When preheating it climbs to the correct temp but then cannot maintain it even when no filament is being loaded but still says it’s at the correct temperature. For example it goes to 220c measures at 220 then drops to 160 and displays at 220.
Hi have you got any further with this issue? It seems to be common but I’ve not found a quick/cheap fix. I’ve checked the ribbon cables as advised by Tiertime but there are no shorts. Works occasionally but then it says 400degC when switched on and room temperature. Our UpBox has had very little use.
