robert.n wrote:Hi. My first layer starts to extrude than just stops. The extruder starts to skip. when i stop the print it wont unload. i take the hot end apart and it has a ball lodged in the champher in the hot end. i took the hot end completly apart and checked it but it seems fine. i am totaly lost as for the reason it does this. So i reinstalled the old single extruder and it is printing perfectly. I guess i got a dud extruder. my next step is to put the old extruder in the multi kit. i just don't have time at the moment. i have to catch up on the prints for customers.
First thing I would say is that you probably need to set aside a few days without any customer prints so that you can get this upgrade working properly. There's no point in attempting to upgrade when you are under pressure to get prints out.
You say the "first layer starts to extrude and then just stops," There must be a "trigger" for it to stop; what's happening, is it doing a filament change? It may be a good idea for you to upload the (zipped up) gcode so we can have a look for any clues in there.
Please note: I do not have any affiliation with Prusa Research. 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.