2 errors in one day. "BED PREHEAT ERROR" and "BED THERMAL RUNWAY"
1. Hello to all!
2. Here is my problem:
The first "BED PREHEAT ERROR" error occurred during printing (ABS-T material). I tried to print same model again and then another "BED THERMAL RUNWAY" error appeared.
I followed the advice from this forum and made the following:
In idle state:
1. Checked voltage on bed (11.47V)
2. Checked voltage on PSU (11.99V)
3. The connectors in RAMBO are OK
4. The wires on the bed are well soldered
5. Thermistor is where it should be
Preheating for ABS:
1. Checked voltage on the bed (11.43V)
2. Checked voltage on the PSU (11.58V)
I set the output voltage on the PSU (12.62V)
Then the voltage on the bed is 12,01V
After all I still have a problem with printing the ABS-T models because after 7-10 minutes,printer shows one of these errors. Temperature starts to noticeably decrease after the fan is switched on.
The same models in PETG (by Prima3D) were printed very well.
Does anyone have an idea / solution?
Printer: Prusa MK2S
Firmware: 3.0.12
Greetings from Croatia!
Re: 2 errors in one day. "BED PREHEAT ERROR" and "BED THERMAL RUNWAY"
Another user has reported that the nozzle cooling fan hitting right over the bed thermistor caused this problem for him when doing ABS on a small object. By moving the object away from the center of the bed, his problem went away, since the fan didn't hit right over the thermistor.
(This is from memory - if you search those errors, I am sure you will find that thread.)
Any advices given are offered in good faith. It is your responsibility to ensure that by following my advice you do not suffer or cause injury, damage or loss. If you solve your problem, please post the solution…