angryfatcat

I tweaked both the Jerk and outer wall acceleration upwards (7 to 10 for the jerk, 500 to 650 for the acceleration) and this seems have fixed the problem without introducing any ringing. So, I think your suggestion was spot on.

I do the same thing when using cura. But a text file is so clunky. Adding a simple notes field would be a huge, huge help when fine tuning settings.

Both the 35 mm/s and the 15mm/s used outer before inner. Maybe my thinking is wrong here but if at 15 mm/s works but normal speeds do not - then it must be some form of overshoot. Essentially, I've taken Jerk/acceleration out of the equation at these speeds. If Prusa can print this at speed - then I would think Cura could as well. I'm looking at some of the differences in the gcode: Prusa: M201 X9000 Y9000 Z500 E10000 ; sets maximum accelerations, mm/sec^2 M203 X500 Y500 Z12 E120 ; sets maximum feedrates, mm/sec M204 P1500 R1500 T1500 ; sets acceleration (P, T) and retract acceleration (R), mm/sec^2 M205 X10.00 Y10.00 Z0.20 E2.50 ; sets the jerk limits, mm/sec M205 S0 T0 ; sets the minimum extruding and travel feed rate, mm/sec Cura: M201 X500.00 Y500.00 Z100.00 E5000.00 ;Setup machine max acceleration M203 X500.00 Y500.00 Z10.00 E50.00 ;Setup machine max feedrate M204 P500.00 R1000.00 T500.00 ;Setup Print/Retract/Travel acceleration M205 X8.00 Y8.00 Z0.40 E5.00 ;Setup Jerk So it looks like the X/Y jerk is higher in Prusa, but the Z/E jerks are higher in Cura. The accelerations are also much higher in Prusa than in Cura. I guess my question is - am I on the wrong trail here in thinking that the jerk/acceleration could be the cause?

Setting it to 35 mm/s didn't do it, but bringing everything down to 15mm/s did. Other than the z-seam, its just about perfect. I still wonder if this could be handled at a more normal print speed with jerk and acceleration control - which were not enabled.

I'm relatively new to Cura and I'm running into a problem that looks like its related to slicing and not printing. I've tried about a dozen times to print this object with out the defects that appear around the curves areas on the front and back (where it curves in, out and in again). After making no improvements, I re-sliced this with PrusaSlicer using the same basic settings and the defects were gone. There is an exposed z-seam on the side, which is not in view. I'm a big fan of Cura, so I'd really love to know how ot print this successfully without having to use a different slicer. Printed on an Ender 5 Pro with AMZ3D Dark Violet PLA Nozzle: .4mm Layer Height: .2mm Wall line count/thickness: 4/1.2mm (have gone down to 2 - no improvement) Infill:40% (have gone down to 0% with no improvement) Printing Temp: 205C (Also printed at 185C, no improvement) Build Plate Temp: 65C Print Speed: 80 mm/s (60 mm/s and 50 mm/s look about the same) Wall Speed: 40 mm/s (also tried 30, 25) Retraction: 5mm at 25mm/s Fan Speed 100% after layer 4 Coasting enabled Sliced with Cura 4.6.1, printed via SD card, Bed leveled with BLTouch. Firmware is Marlin 1.1X . I've tried: Slower speed turning off coasting fewer walls/no infill Equalizing nozzle pressure Reducing flow rate for the outer wall down to .95 Turning off/adjusting retraction speeds I'd really love to figure out how to print this without those defects from Cura. Any help or suggestions would be greatly appreciated.