Poor outer wall quality Cura 3.x/4.0

[nagygabor679 0]

I would like switch from Repetier+Cura 2.x to Cura 4.0. I use  same printer, same filament, same speed, layer height, nozzle. But Cura 3.x and 4.0 make much worse quality wall, as you can see on photos. I tried hundreds of settings, but nothing not changed with this issue. Please help , how can I try fix it? Thanks!

 

 

[burtoogle 516]

8 hours ago, nagygabor679 said:

Please help , how can I try fix it?

 

Hello @nagygabor679, to help us diagnose the problem, please save a project file (File -> Save) and attach the resulting .3mf file to this thread. Then we can see the settings you are using. Thanks.

[nagygabor679 0]

Hi, the file is attached.  I use my printer with bowden , the lenght of the bowdwen is about  50 cm . Many thanks!

CFFFP_suti 77 virag.3mf

[burtoogle 516]

Hi, thanks for the file. I would recommend two changes, enable the Optimize Wall Print Order setting to reduce the amount of travel required and also set Max Comb Distance With No Retract to some non-zero value (10 or 20?). Hope this helps.

[nagygabor679 0]

Hi, thanks for  fast answer. The result is maybe better, but not good 😞

[burtoogle 516]

Do you still have the gcode that produces a better result? If so, please attach it to this thread so I can compare it with what is produced now. Thanks.

[nagygabor679 0]

Here is the gcode of Repetier, what is perfect , and the Cura 4.0 better version:

cura4.gcoderepetier.gcode

[burtoogle 516]

Thanks for the files. The most obvious difference is that the cura4 file has part cooling fan running and the repetier file has no part cooling fan.

[nagygabor679 0]

Sorry, I forgot turn off fan, when I made the sample code with Cura4. But I can't remember exaclty the fan setting, when I made the first pictures, so I print a new test without fan. This isn't good still. 

 

Cura4_fan_off.gcode

[burtoogle 516]

The next obvious difference is the repetier code is doing 6mm retracts at 80mm/S and the cura4 code is doing 4mm retracts at 30mm/S.

[burtoogle 516]

BTW, are you printing these two gcodes using the same method? i.e. both from SD card or both using USB with the same host program?

[nagygabor679 0]

I printed both using USB, but the good version  printed with Repetier Host+builtin  old Cura slicer (I think 2.xx version), the worse version printed with Cura 4.0.

[burtoogle 516]

28 minutes ago, nagygabor679 said:

I printed both using USB, but the good version  printed with Repetier Host+builtin  old Cura slicer (I think 2.xx version), the worse version printed with Cura 4.0.

 

So maybe it's a USB comms issue?

[nagygabor679 0]

I tried print Cura4 gcode from SD card. No change.

[burtoogle 516]

OK, so what about the difference in retract amount & speed I mention above?

[nagygabor679 0]

I tried lots of different retract lenght and speed, but I will do a test with same retrect settings, if you think. But Im tired, it will be tomorrow. Many thanks, because you try help me.

 

[nagygabor679 0]

The outer curved wall unchanged (Signed with blue). But I noticed, inside curve of my test object is almost good. I took a picture about inner curve, what I signed with red. (I think it was changed, before I made the last retract settings, but I notcied only now.)