Suddenly poor print quality

[MrBorg]

I bet this could be a Slicer issue more than a printer issue. But I don't know where to start looking.

From having the most incredible prints done by my Geeetech A20M I suddenly get very ugly blobs on my projects.

I have lately upgraded to Cura 4.2.1 - and I can't say if it started before. I think a good idea would be to include Cura version in my gCode files (then I always could compare and check versions).

Here is a picture of my present problem:

2019-08-19 14_38_57-Window.png (548.23 KiB) Viewed 8438 times

And this is a print I did a week ago which was so perfect (I'm very impressed by the A20M printer):

2019-08-19 14_51_34-Window.png (395.18 KiB) Viewed 8438 times

[William]

Hi, You can try to reduce the printing speed appropriately, the reference range is 30-60mm / s.

[MrBorg]

Thank you for your reply - I think I will try that out. I actually tried to print with my second material (color) and that came out without blobs so it is somehow related to my white color printing and yes it could be the speed.

[pplg]

I don't like to confuse you. So please go on with your forseen changes.
If this does not bring you success, try to change your nozzle.
I had similar looking Problems and tried a lot and when I finally changed the nozzle everything was good again.
(My explenation as a dummy was, that there was some change in the nozzle e.g. small parts or the nozzle was slightly damaged at the outlet edge that disturbed the proper flow of the liquid filament).

[MrBorg]

Thank you for your suggestion - it is highly appreciated.

But as my printer has only one nozzle but two extruders (I think it is called) and I made some good prints afterwards with my other filament (a more flat project) so I think it could be a slicer setting issue.

[MrBorg]

Well I think I have solved it - fiddling around with my slicer gave a new and better result. Very nice print:

[3DAngel]

hello Mr. Borg,

I'm assembling my A20M....(long story)...
would you be willing to share your config profile for the A20M?

I'm spending much of the time fixing my "new" A20M, and wish to have a "short-cut" from the slicer tinkering....
only if you have time.... thanks in advance

[MrBorg]

Hi I'm willing to share what ever can helps you - at the moment I get some fine printing - but I'm using Cura 4.3.0 - send me your email in a PB then I will send you my slicer but i don't know if that's what you are asking for.