New Prusa XL with blobs and crash
Hello everyone,
I have been the happy owner of a Prusa XL with 5 x push buttons for about a week now.As I have already successfully assembled 3 x normal Prusa as a complete kit, I had also ordered the Prusa XL "partially assembled".The assembly was also no major problem and was completed within 2 x days (with breaks).Before the first print, I carried out all the function tests and calibrations as described.These were all(!) successful.
Then I started my first print, with one colour, and it went through successfully.Perfect print image, no smudges, no threads, just great.
With this success, I wanted to try printing with 2 x colours straight away.A simple model in which only the lettering is given a different colour and is also only 2 x layers thick.And this is where the problems start.The printer started with the first colour and when it stopped (i.e. before the colour change) it left a huge blob of filament behind.At some point, the printer bumped into this blob of filament with its head (logical) and then jumped off track!It then completely lost its position and simply continued printing with a 10cm offset.Of course, this went completely wrong and it then hit the side frame with full force, causing the print head to jump out of the tool changer and lie on the print bed.There were no signs of this beforehand, the printer had printed flawlessly again until the blob, perfect first layer, no threads or anything like that.
I then made a second attempt, but again there was a blob before the tool change.
I now have several questions about this:
1. how can this happen, i.e. the blob?2. why does the crash detection not work? I wanted to switch it on in the settings, but this option is greyed out, so I can't change it.3. what I have also noticed is that my filament is not fed automatically. I have to manually push it all the way to the print head and then through it and start everything manually in terms of loading filament. But the corresponding settings are set and, as I said, the filament sensor calibration ran successfully.