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Poor outer wall quality Cura 3.x/4.0


nagygabor679
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Posted · Poor outer wall quality Cura 3.x/4.0

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!

 

Nem érhetŠel leírás a fényképhez.

 

Nem érhetŠel leírás a fényképhez.

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    Posted · Poor outer wall quality Cura 3.x/4.0
    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.

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    Posted · Poor outer wall quality Cura 3.x/4.0

    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.

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    Posted · Poor outer wall quality Cura 3.x/4.0

    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.

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    Posted · Poor outer wall quality Cura 3.x/4.0

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

    cura4.gcoderepetier.gcode

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    Posted · Poor outer wall quality Cura 3.x/4.0

    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.

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    Posted · Poor outer wall quality Cura 3.x/4.0

    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. 

     

    image.thumb.png.7cb93139e31c7556d88e5c6a442db892.png

    Cura4_fan_off.gcode

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    Posted · Poor outer wall quality Cura 3.x/4.0

    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.

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    Posted · Poor outer wall quality Cura 3.x/4.0

    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?

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    Posted · Poor outer wall quality Cura 3.x/4.0

    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.

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    Posted · Poor outer wall quality Cura 3.x/4.0
    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?

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    Posted · Poor outer wall quality Cura 3.x/4.0

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

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    Posted · Poor outer wall quality Cura 3.x/4.0

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

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    Posted · Poor outer wall quality Cura 3.x/4.0

    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.

     

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    Posted · Poor outer wall quality Cura 3.x/4.0

    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.)

     

    image.thumb.png.4ee0824448ed29ffc09688e50b952780.pngimage.thumb.png.2f6d13011954536070e96591237321ea.png

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