Poor surface quality on parts with retarction

[targeter 15]

http://umforum.ultimaker.com/index.php?/gallery/album/1009-bad-surface-quality/

Ive uploaded some pictures in this album of my attempt to print emmets folding lamp shade thing.

And the print quality is horrible. Lots of odd layers and blobs.

I need help and advice to what im doing wrong, or if its something worn down on the printer.

 

[gr5 1,372]

You have two completely different problems. The lower area has problems caused by overhangs I think. The upper area has basically slicing issues. What version of Cura are you using? There was a bug introduced recently and then fixed in the latest version that can cause the problems on the upper areas of the shade.

You might be able to improve the upper area by having a shell of .8 (2 passes).

The lower area will be improved if you slow it down quite a bit and it's critical that the fan is on 100% to get good quality surfaces. Try 20-35mm/sec just to see what happens. Let it print for 24 hours if that's what it needs.

A third issue: there are some layers that look thicker - as though the Z didn't move enough. I would grease the Z screw and move the bed up and down to make sure it isn't getting stuck on some layer moves. Also consider .2mm layer height as the thinner you go the more likely you get these long horizontal bands.

 

[targeter 15]

Im on cura 14.03.

Both parts are printed on 40mm/s, the big figure was printed with 0.8mm Shells.

I will try to print a new one using your advices.

 

[targeter 15]

I have uploaded 2 new Pictures in my album

The Picture shows an entirely other part than the lamp shade. Still i get very rough surface quality when retracting.

Any suggestions?

 

[DidierKlein 723]

Cura 14.06 gives better results there was a quality problem with 14.03

 

[targeter 15]

Where to get that? The software page says the current version is 14.03?

 

[DidierKlein 723]

http://software.ultimaker.com/

I just saw there's a 14.07 version

 

[Daid 297]

http://software.ultimaker.com/

I just saw there's a 14.07 version

 

Yes, just pushed that to address some UM2 firmware issue that I didn't fix properly. (Or, "I should have listened to Simon")

 

[DidierKlein 723]

Yes, just pushed that to address some UM2 firmware issue that I didn't fix properly. (Or, "I should have listened to Simon")

 

I guess it's the same as the hex file that illuminarti linked in an other subject?

The new feature with first layer width (there's a typo in the label with instead of width) is it possible to specify more than 100% ?