PETG Filament Printing Issues

[curious aardvark]

given that the printbed on the d9 travels vertically and the printhead just does x&y there is no logical reason for problems at a certain height.

It could be pid fluctuations - I had that very recently. And a firmware refresh sorted it out.

But try different model first.

Benchie haters of the world unite !
lol

Okay - what's wrong with benchies.
1) you learn nothing that you cannot learn from ANY other print.
2) no practical use, they are designed to go straight in the bin.
3) see point 1 :-)

Retraction and flow - are prettt much all that counts.
If your retractions are right, then you do not get stringing. Print two small items a couple of inches or so apart.
When no stringing between them - retractions settings are good.
Temperture, print speed and cooling are responsible for material flow.
Generally speaking, if you get the extraction settings right - the other three are near optimal anyway.
Tweaks to temp and speed can be done until stringing starts back up.

Anything else is down to the mechanical setup of the individual printer.

So not only are benchies a complete waste of plastic - they don't actully tell you aything you can't learn from just printing something small you can use, or give away.