I made a few unfortunate discoveries today when I tried to start a print on the Prusa mk3.
The fan housing around the hotend has melted and the Bed Sensor is now at a 45deg angle. Trying to start a print in this state will fail the Bed Levelling Check because the sensor can’t see the bed.
The fan housing (other parts?) will need to be replaced.
I started taking it all apart then stopped since I don’t have any replacement parts. Best to keep it together so nothing gets lost.
I also noticed that the hotend does not have a Silicone Sock on it.
It needs one. A sock would have prevented the housing from melting and will also improve print quality as it helps separate the “heating” from the “cooling”.
And yet another unexpected discovery was that the power cable needs to be replaced IMMEDIATELY.
It’s an actual FIRE HAZARD !!
When I was moving the printer from the enclosure to the desk to investigate the bed sensor issue, I grabbed the power cable to unplug it. It was VERY Warm and VERY Soft. This cable is clearly not rated for the current that the printer is pulling. The printer wasn’t even on for 10 minutes!! It’s connection to the printer was even super loose too!! It’s just a really crappy cable and should be thrown away so it doesn’t cause a fire.
I plugged a different cable into the printer. The problematic cable (light grey) is still on the desk beside the printer.
It's worth checking all the other power cables being used by printers to ensure they are capable of carrying the required current loads.
I’m looking at printing replacement parts but exactly which parts should be printed (looks like upgraded parts) and which printer can be used to print them?
Prusa’s STL’s are here: