The aperture can oval, it would vary more on one axis than the other the fur along the edge is a possible tell. It is way easier than some of the other possibilities.
Hello all you guys. Thank you for your valuable information. But my printer has broken down alltogether, so my first action will be to get to repair it.
As soon as it is up and running again, I’ll check your sugetions. For now, i’d like to close the subject.
Well, OK. But I’m curious: what happened that it “broke down alltogether”?
@LEGOManiac
The bracket holding the BLTouch has broken off and the cover of the heat bed s gettiing unstuck.
I’ll need to print a new bracket, but my second printer develloped a clogging problem. So that needs to be fixed first, then I can get onto the repair of my first printer.