Hi there. I’m really getting crazy here. I have my snapmaker for quite some time now and was initially very happy, but that happiness is constantly deteriorating. I can’t get “complex” prints to work. I had big issues with stringing, but gut them pretty much under control with changing print temperatures and retraction parameters. I printed a Building recently after these adjustments and stringing was ok, but I still have a major issue. Some layers seem not to print ok. They don’t seem to adhere right (see picture one and two). To rule out a mechanical issue I printed a simple part and had no issues. I can pretty much rule out wet filament, since I opened a fresh new role just for the print and printed the simple model after the complex one.
Does anybody have any ideas what I could try. Really frustrated here 
I’m using Cura slicer, 1mm retraction at 35mm/s, and 205°C printing temp (after Temp. Tower tests).
I think you see counterforce on the extruder which causes this underextrusion or maybe up pulled extruder..
Get sure your filament path is free, your spool not tangled and the force of the feed path is as less as possible.
Maybe try it with the spool inside the enclosure as test.
Or, other possibility: You have too many retractions in short succession. This may cause the feeder gear to gnaw away your filament until it looses grip and does not feed any more. In Cura, you can select a maximum of retractions that should happen within a given window of filament length. Default is 99, and I find this too much. I go with 25.
Thanks for your reply. That was one of my ideas as well. Sometimes I can also hear a clicking noise, which interpret as a problem with the retraction and the filament slipping. I played around with the settings you mentioned to reduce the parameters as much as possible. Maybe it is not enough? These are my current settings:
Thanks for your idea. The filament rolls easy off the spool, as far as I can tell. The tube the filament is going through seems to be free as well. So I think it’s not a “mechanical” issue, but I am not sure