<p><a href="https://i.stack.imgur.com/WwWuN.jpg" rel="noreferrer"><img src="https://i.stack.imgur.com/WwWuN.jpg" alt="3D printing problem stringing"></a></p>

<p>So these past few days I have been 3D printing again with my Ender 3 with PETG and 0.4&nbsp;mm nozzle and while I have been using the same setting as usual I am seeing an unusual amount of stringing between the prints. Does anyone know why? If you're wondering regarding the settings here they are, I'm using Cura for slicing, see options:</p>

<p><a href="https://i.stack.imgur.com/ialqzm.png" rel="noreferrer"><img src="https://i.stack.imgur.com/ialqzm.png" alt="Quality"></a> <a href="https://i.stack.imgur.com/Tc2Blm.png" rel="noreferrer"><img src="https://i.stack.imgur.com/Tc2Blm.png" alt="Shell"></a> 
<a href="https://i.stack.imgur.com/3SpNZm.png" rel="noreferrer"><img src="https://i.stack.imgur.com/3SpNZm.png" alt="Temperature"></a> <a href="https://i.stack.imgur.com/6H1M6m.png" rel="noreferrer"><img src="https://i.stack.imgur.com/6H1M6m.png" alt="Retraction"></a>
<a href="https://i.stack.imgur.com/0KMAQm.png" rel="noreferrer"><img src="https://i.stack.imgur.com/0KMAQm.png" alt="Speed"></a> <a href="https://i.stack.imgur.com/xWib6m.png" rel="noreferrer"><img src="https://i.stack.imgur.com/xWib6m.png" alt="Cooling"></a></p>

[{'answer_id': 13602, 'author': 'M lab', 'author_id': 21079, 'author_profile': 'https://3dprinting.stackexchange.com/users/21079', 'pm_score': 0, 'selected': False, 'text': '<p>Petg it stringy material, all I can do is keep it dry to prevent blob. but I live in hot country with high moisture so I decide to keep filament in heat dryer box while print. It help a lot. </p>\n'}, {'answer_id': 13808, 'author': 'R.. GitHub STOP HELPING ICE', 'author_id': 11157, 'author_profile': 'https://3dprinting.stackexchange.com/users/11157', 'pm_score': 3, 'selected': True, 'text': '<p>The travel speed of 160 mm/s is a big red flag. PETG is not tolerant of a hot nozzle moving over it at high speeds, especially unretracted (combing). The nozzle will drag material in a stuttering pattern, every so often, marring the surface and pulling what it dug up into strings.</p>\n\n<p>Lower the travel speed to the same as the print speed, and then experiment with whether you can increase it without problems. I would not try going over 80 mm/s and probably not even over 60.</p>\n\n<p>For what it\'s worth, this <em>sounds like</em> softened/molten PETG is a non-newtonian fluid, where at low stress (slow moving nozzle pushing/pulling) it deforms gracefully, but at high stress (fast moving nozzle) it strongly resists deformation and has a discontinuous breaking point. A quick Googling turned up this article, <a href="https://link.springer.com/article/10.1007/s10924-019-01544-6" rel="nofollow noreferrer">Thermal, Rheological and Mechanical Properties of PETG/rPETG Blends</a>, which might explain what\'s happening.</p>\n'}]
['https://3dprinting.stackexchange.com/questions/12226', 'https://3dprinting.stackexchange.com', 'https://3dprinting.stackexchange.com/users/20341/']