I have been having trouble since I bought a new brass nozzle. I replaced the old one with the same type, after over a year of daily prints. Now I have two problems.
1. When doing the Checkup using Cura 3.1, the nozzle temperature never says "checked", even though the nozzle heats to 180C and stays with in +/- 0.5C.
(I won't worry too much about that, since it's heating.) The X, Y, and Z-stops and also the bed temperature Checkup just fine.
2. The first layer is not good. I have set the Z-stop, and with blue Loctite for vibrating screws, held it in place, in the right place. The