I just finished a 1 day print of a cylinder and I can say the results were not so good. the cylinder didn't come out with an actual circular cross section but instead of many points joined by straight lines. I used light infill for the print with auto fan so does that have to do with it or is this the limit of Zortrax?
I added some photos and u can see straight lines going across the length of the cylinder
The problem is definitely not the printer! Those surfaces come from poor stl files. You don’t have enough polygons. You can try to fix it with meshmixer or if you have the original cad file you can improve the export settings.
I don't think the trouble is in the STL folder since it is converted using solidworks. I convert all pieces I make through this program and they didn't cause any problem
No thats not a printers fault. The stl is low poly and the issue comes directly from solidworks. Use netfab to check your stl file. Im sure that you will see these straight lines exist. You can see an example of a low polygon cylinder versus a high polygon in the image below
In Solidworks there should be a setting to increase the quality of exported files, one of the experts with the program will know what it is.
There is a setting to view the object in wire frame mode, this will show how large your polygons are if the model its self is being generated in low def.