Help with Anycubic i3 Mega S - 1st layer just not printing :-(

[thegoodguy]

Hi all,

I posted a problem similar to this before, and curious aardvark pointed out that I am setting the nozzle too close to the plate. Remedying this helped for a few prints, but now I'm havingf a very similar problem again :-( .

The print begins. The skirt is a bit shoddy to begin, but I think that's "normal" because this is the purpose of a skirt, right? To settle into a nice print-flow before begining the main event. The skirt doesn't really print well by the time it's completed either. Then when the main print starts the nozzle simply gathers a large blob of PLA on itself :-( .

I have adjusted the plate so that the paper-measure fits:

with little resistance - poor print
with medium resistance - poor print
with high resistance - poor print.

The nozzle/plate distance doesn't seem to make any difference.

I have uploaded a video of one of the (8!) attempts here: https://youtu.be/9yRwQ9FfI4M and I've uploaded the g-code file.

If anyone with with more expertise than me (not difficult) can take a look and help, I would be grateful.

Thanks.