Obligatory “I got a 3d printer for Christmas” and I’m absolutely loving it, fell down the rabbit hole head first. However I’m currently dealing with an issue where my Neptune 4 Pro is slowing down to 7 mm/s when it is printing the outer walls despite being setup in Cura to print at 25mm/s. Filament is Overture PETG. Pictures show the Neptune touchscreen with the 7mm/s speed shown in the bottom left and a screengrab of the speed settings from Cura. Any help is greatly appreciated!
There’s a lot that goes into the print speed, including volumetric flow (measured in mm^3/s) and minimum layer time, used for allowing layers to cool enough before printing the next one so the print doesn’t end up a blob. You want to slice the object and then look at where the speed changes in the preview. That will give you an idea of what’s happening. It could also be down to the settings Cura uses for PETG.
Ah! Thank you for the explanation! I will mess around with the slicer previews more, I was actually unaware you could see the speed changes in the preview. I’ve mostly only used it to make sure the printer wasn’t going to try and print in mid air because I dislike printing supports if I don’t have to.