MK2.5 Upgrade - Extruder Too Hot!
I disassembled and reassembled the kit (2S to the 2.5).
Installed the firmware. At first I installed the Rambo10A and was getting a constant sound from the board. I realized I loaded the incorrect firmware and then loaded the Rambo 13A firmware. Sound went away (thank goodness).
I then went through the Pinda 2 height adjustment procedure.
I know I am skipping some steps here but I then did the following:
I then performed a preheat for PETG. The bed reaches temp but the hot end got very hot (smoking) but the LCD display was indicating 25 deg C the whole time. It may have went up to 26 deg C. during the warmup.
I figure that the thermistor is bad at the hot end. I just ordered a new thermistor but I have to wonder why there aren't safety protocols preventing this from happening, which then makes me believe there is another issue going on.
Is it just a bad thermistor?
Re: MK2.5 Upgrade - Extruder Too Hot!
Firstly: There is some possibility that you burned your rambo sensory part. You will see if new thermistor helps, if not (partially) dead board appears as most common problem (especially if you considering you rambo FW issue).
Safety protocols are in there and it is working (probably save my flat several times), I don’t know why them not triggering. I thing that if set point of temperature and manipulated value difference (error) is greater than 15°C for more than few minutes, printer will trigger alarm and switch heating off itself. Maybe it is switched of for “heating procedure” just because you need (should) to sit in front of printer and wait for passing calibration.
University: MK2S upgraded to MK3 with MMU2.0
Home: MK3
Materials: ABS; ASA; PETG; PET; PLA; Nylon; Nylon Carbon; CPE;
SW: Freecad 0.18; Slicer PE And still generating more troubles than whole forum together.