[[Ender 3] [PETG] Blobbing on Corners of Print]

Please let me know asap if you have had any luck with this.  I am also printing PETG with Overture black, however I am using a 1.2mm nozzle.  I have ranged temperatures from 235C to 280C, played with Retraction, speed, etc.  I always get a little oozing that then clogs the tip of the nozzle when it slides scross an existing line.

[PETG Clogging on Large Prints]

I have been stuck for several days on this issue using PETG.  No matter what I try it is the same problem.  I am using a 1.2mm nozzle, Volcano Hotend, on a  Modix Big 120 and I am printing an object 1100mm long.  Nonstop parts are fine, but when the extruder travels from one part to another and it crosses over an existing line, there is a little bit of oozing that wipes and then clogs the very end of the nozzle. It happens usually in the same spot.   I have messed with retraction settings, sped 150mm/s across the machine, adjusted temperatures from 240C to 280C, and nothing seems to work.  Has anyone printed PETG with a 1.2mm nozzle before and can get me the best settings?

[How to setup CURA for Modix machine]

I have had a Modix Big 120X for almost a year and a half now.  I will tell you it is awesome.  I have printed giant prints (like 4 foot long) with NylonX, PLA and ABS.  I found this site as I am having some issues with PETG and am hoping the Cura slicer helps.  While I am looking for the settings as well, I saw TwoFiftySWB's comment and wanted to weigh in on your components.

 

Immediately upgrade the bearings in your rail cartridges to ceramic bearings.  I had shifting problems as well and it took forever to finally diagnose the issue.  It is real easy to do.