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Printer not working after Cura update.

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Posted · Printer not working after Cura update.

Hello everyone. I have this issue, hope somebody can help me: 


I have a Prusa with Marlin firmware. It have been working fine, up to I decided to update my Ultimaker Cura slicer from 3.2.1 to 4.6 (latest version until now). 


Now, printer doesn't work. This is what happens on Cura: 

- Printer gets connected as usual.

- Extruder temp shown a fixed 358°C value with extruder at ambient temp (about 20°C). 

- When bed heater order is sent from Cura, cooling fan starts (such as if ports were swiped). 

- When bed temp sensor is disconnected, extruder temp shows 0°C, and viceversa for the extruder temp sensor. 


What I found when tried to open Repetier Host: 


- When connected, it shows: "Extruder switched off. MAXTEMP triggered !". 

- X and Y axis works fine. 

- Z axis sometimes doesn't word. 

- Cooling fan works fine. 

- Bed heater and extruder don't work (heaters don't turn on). 

- Bed heater temperature is shown fine. 


What I have tried so far: 

- Send M999 code. Nothing happend. 

- Send M562 to reset temperature fails. 

- Send D0 and D1 to clear EEPROM and Reset. Echo: Unknown command. 

- Sensors are ok, I tested them and in both cases resistance is about 100k. 

- I uploaded again Marlin software to the Arduino (the version I was using and I was sure it was working fine). 

- I uninstalled 4.6 version and downloaded 3.2.1 again, but the problem is still there.


Be warned that I haven't made any change in the printer hardware or connections. Just updated Cura software and that made all this ha´ppenns. Hope you can give me some tip to help solving it. Thank you. Gabriel. 

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