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Diagnosing UM2 Problem

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Posted · Diagnosing UM2 Problem

Hi all and thanks in advance for any assistance. 


My faithful UM2 has been acting up lately and I am trying to figure out if its my Cura settings or something mechanical with the machine. 


Attached are two prints.  The blue one is printed on my UM2 using ESUN 3mm PETG.  The black one printed on my BIBO2 using ESUN 1.75mm PETG.  Exact same Cura profile but no matter what tweaks I do to the UM2 profile (lower temp, retraction and combing adjustments,  etc), I can not seem to get it to print clean. The UM2 use to print as clean as the BIBO but now its shit.  UM2 has new .4mm nozzle.


Any thoughts? 







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