sophocha

I know this is old but I wish I had this option. I have a fan duct ending on 10 tiny posts. I have the printer retracting on every single one but it starts printing with blobs and ends fine on the final post. I just cannot figure out the best setting for the situation. Changing flow will start great but end with a weak final post that breaks. Coasting helps a bit but still the same. More retraction will create bubbles in filament so I cannot retract more....it is a never ending cycle. I wish I had an option to chose more retraction at the beginning and less at the end.

....also, if you want to avoid stringing on PETG, do this mod. Take a dab of silicone, and cover your nozzle with it. Raise your temps @ 100 to cure it. Take it off and cut the very tip with a razor, just barely seeing your nozzle tip. Voila. Now the extra filament won't stick to your nozzle and make a stringing mess.

More testing on this profile. It looks really good for a PETG print on a 0.6 nozzle.

Here is my new Cura profile on 4.3 (0.6 nozzle and PETG) I think something is terribly wrong with the outer wall settings of Cura. I was always ending up with uneven walls, over-extrusion on the edges, under extrusion at the beginning of a layer, LOTS of stringing on PETG, etc. Here is a Calibration Cube print. The one on the left is my perfect print after I tweaked my settings. Things I have done: 1) Decrease my flow to 96% (Except the initial flow 98%).That helped a lot on the definition of the prints.Much cleaner prints now. 2) Make the out wall count to at least 3. That eliminated infill showing on the outer walls. 3) THE MOST IMPORTANT SETTING.....Z seam alignment to SHORTEST and seam corner to "hide seam". This is crucial. Any other combination of settings produced uneven outer walls, blobs and lines on the outer walls (see the obvious line in the middle of the calibration cube...middle cube in the photo).The start of each of the outer layers is slightly off with any other settings, so this produced a smooth,even outer layer. 4) Printing temperature @ 210 no matter what everybody is saying!! (printing at 230-240) produces a lot of stringing on PETG. Printing at 210 made all of my prints perfect! I also have a Petsfang mod with a big fan, but I have all my fan speeds at 50%. Also, "filter out tiny gaps" (enabled). If you don't have this ON it also produces a lot of stringing cause it tries to fill the gaps and the extra filament sticks to the nozzle. 5) Obviously enable retraction( in my case 6mm, 50mm/s speed). 6) Printing speed around 30 to 40mm/s except the 1st layer.Also, buy a creality glass bed and some hair spray. No more problems with elephant foot or not sticking to the surface. This solved all of my issues with big prints coming off the plate. Now I have to wait for them to cool down in order to take them off the bed! 7) Enable jerk control and change the outer wall jerk to 5 mm/s.That also solved the over-extrusion/bulgy edges. Much more smooth edges! 😎 Enable coasting. I wasn't having any luck in the past with this, BUT with all these settings in mind, enabling this (default settings) will help alleviating any seam showing too much on the outer wall.....and last.... 9) Outer wall wipe distance....make this 0.4mm to 0.6mm. This creates great starting layers because it wipes the nozzle. There! You now have the perfect profile for PETG. 2020 PETG 0.6 coasting less flow.curaprofile

well well, look at that....perfect outer layer. 1) Stick with Cura 4.2.1. Much better improved profiles. 2) No more old customized profiles.I just ditched everything....Choose the draft profile from the settings. 3) In my case, raise the temp up a little bit (210). 4) Z seam alignment (shortest) with "hide seam" 5) See the photo. Almost perfect outer wall. I knew it wasn't my printers' fault.I can go really fast as well. Do not know what the problem was. Maybe I over-tweaked some settings...

I have changed the feeder gear into a metallic one.No more grinding the filament.I think the problem lies elsewhere. Everything is perfect except the very beginning of a layer.Maybe I will change the speed to a very low setting so that I can pinpoint where the problem is and go from there.

Hi all, I always had underextrusion problems on my ender 3 since day one (specifically on long runs).Tried to fix it by slowing the speed down and it did work for the majority of my prints.I have recently switched to cura 4.2.1 and it seems that the problem is more severe now on cylindrical models.Look at the pic.Same profile, cura 3.6 on the right, cura 4.2.1 on the left. When the nozzle switch from infill to outer wall (even with retraction off!!) it still underextrudes! Tried some prime setttings but it seems nothing works. The rest of the print is spot on except the dreadful start of each outer layer.