Adventurehill1

I ran a quick print with those settings and support turned on. It definitely improved the stringing problem, but didn't solve it completely. I'm curious what setting you tweaked?

Ok I just realized I used the stock TPU setting accidentally instead of your tweaks. I'm shocked that it even melted enough to do anything at 210 degrees. I'll print one with your settings.

My dryer gets to about 110F, which does seem cold to me. I didn't unspool any filament and I left it in for 8 hours.

I tried those setting sitting flat (Z straight up) and it worked beautifully. I do need a smaller layer height if I can possibly get it though.

Here is another print I did. I plated two cubes, one with supports and one without, similar to how they are placed in the picture. The plastic is stringing, but only from the strange layer on the outside. I did a print without supports and it did the same thing. I also double checked the nozzle setting and, yes, it is a 0.4. As for feed rate settings, I assume you are asking about E steps? I have calibrated those. I just got Cura 5.7.0 yesterday, I will switch. Hopefully that's helpful.

I have a filament dryer, which I used then printed again. The results are, well, exactly like before. the last two cubes have been printed with the settings I attached. I'm really not sure what else it could be. I will print again with line width and flow same for infill and support and see what happens. StrangeCalibrationCube.3mf

It's not underextrusion. (Sorry for not explaining better) It's more like a flaky surface layer that can be peeled off (Maybe overextrusion?) My infill has been having issues with just "bunching up" at the intersections, so I have everything set higher to help it stick where the extruder puts it. Also, I believe my hotend runs hotter than displayed by a good bit, which seems to be a Kobra problem. I've printed everything between 220 and 250 and for me 225 is the sweet spot. There is a stock profile for the Kobra, but it's pretty bad. I added it to the reply so you can take a look. StockCalibrationCube.3mf

Here is the result with a brand new nozzle. The strange stuff on the outside of the print can be removed by hand without leaving too much scarring, but I would still like to know what's happening.

Unfortunately the new layer height and line width settings still make a model that looks like it was 3d printed by hand. I am wondering if it is my nozzle, so I will change it for the next print.

Have you set the print area size to match your printer?

I've been trying to debug this sloppy mess my printer call finished prints for a while now. So far for PETG I've tried changing temperature, print speed, retraction settings, and cooling, as well as some other minor changes. It all looks about the same. I'm no expert, but I think the Z axis on my machine (Anycubic Kobra Max) is pretty decent, it has dual z motors and everything. I don't really want to change layer height more than I have to, since I need a smooth surface, but I can switch to a 0.2 mm nozzle.

I need a smoother surface on my print than a 0.2 height and 0.42 line width will give me. It's an aerodynamic part, and it needs to look good as well.

I'm using a 0.4. I was led to believe that a layer height of 0.08 was possible, so I thought I was being conservative. What is the smallest layer height you would recommend? I can switch to a 0.2 nozzle of it's not small enough. Yes.

Also, the settings on this profile produce some pretty disastrous results...

Cura is filling in the top corners of the X in this calibration cube. Is that a setting I can change? Help with CalibrationCube.3mf