This is not a question, but rather an advice story for those of you new to 3-D printing, as I am.
I printed some fairly simple prints, which I had to repeat several times and the first four came out wonderfully, but the next one was the mess. The first layer was not sticking to the bed, because occasional globs of plastic would interfere with the print head, causing the print to be pushed around on the table. After several hours of research and three different bed leveling sessions, which were all to no avail, I decided that maybe I needed to change the nozzle. When I took the boot around the nozzle off, I found it was impacted with all kinds of plastic. Apparently the nozzle that was installed at the factory was not installed tightly and filament was melting around the threads and seeping into the boot. I never thought to check the factory installed nozzle.
Once I clean that all up and installed a new nozzle and went through a bed leveling procedure it’s now all working like a charm.
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Darn good advice skip, one that I tell people and fail to do myself 7 printers in.
The list of possible “loose nuts/screws/fittings” on this level of machine is long and varied. It isn’t just Creality, but rushed manufacturing and little Quality Control is just the way it is. For the price we pay, they are all a bargain but require some checking before use.
Some screws need to be tight for sure, but there are a couple that need to be a little loose to give a bit of float, ie Z leadscrews.