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Wall strange artifacts in a rail kossel

Posted by masterviana 
Wall strange artifacts in a rail kossel
August 14, 2019 07:13AM
Need some help to identify these problem, in theses model its always getting these strange lines in the middle of the hole, the surface its a circle with a hole on the middle. I've re-printed the model it always getting these line pattern at same place. I thought might be a retraction problem I've start with 2mm now I use 1.7mm and I'm starting to get a lot of stringing. I'm have a bmg extruder mount on my kossel.

These is my configuration in marlin

#define DEFAULT_MAX_ACCELERATION { 4000, 4000, 4000, 10000 }


#define DEFAULT_XJERK 10.0
#define DEFAULT_ZJERK DEFAULT_XJERK // Must be same as XY for delta
#define DEFAULT_EJERK 20.0

In other models its not visible or its not a big a problem, but I also notice that I've some of these patterns in the internal wall

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