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Steverd
(@steverd)
Trusted Member
Crazy external lines - Images

I started to get these lines on the external surfaces on one of my Mini's (I have 6)

What normally causes this? I am thinking I need to do a Z adjust (Maybe raise it a little?

Thank you for ANY Help

The FILE - CUBE

 

Posted : 13/12/2021 6:45 pm
Chris Laudermilk
(@chris-laudermilk)
Estimable Member
RE: Crazy external lines - Images

Looks like same issue as in this thread: https://forum.prusa3d.com/forum/assembly-and-first-prints-troubleshooting/surface-problem-not-smooth/#post-545182

Mini+ (kit) - Revo Micro | Antler Cooling | WiFi (4.4.0RC1)

Posted : 13/12/2021 6:51 pm
Steverd liked
Steverd
(@steverd)
Trusted Member
Topic starter answered:
RE: Crazy external lines - Images

I also forgot to mention that this is eSun Silk green PLA

 

Posted : 13/12/2021 8:28 pm
FoxRun3D
(@foxrun3d)
Famed Member
RE: Crazy external lines - Images

Has nothing to do with live z. Live z only affects the first layer.  Check out that article linked to by cwbullet in the thread mentioned by Chris. 

Formerly known on this forum as @fuchsr -- until all hell broke loose with the forum software...

Posted : 13/12/2021 11:42 pm
Steverd liked
Steverd
(@steverd)
Trusted Member
Topic starter answered:
RE: Crazy external lines - Images

I sent this photo to PRUSA Support and here is their offical reply: Please make sure that the extruder idler screw tension is set correctly exactly as mentioned at https://help.prusa3d.com/.../idler-screw-tension_177367/

SO I Have a spare Bondtech Extruder here, Maybe I should install on this Mini?
Thoughts?

Thank you

Posted : 17/12/2021 3:17 am
FoxRun3D
(@foxrun3d)
Famed Member
RE: Crazy external lines - Images

Both my Minis have Bondtech extruders. Never had to adjust the idler again, never had a clog. So I definitely recommend it. Having said that, I have a hard time seeing the idler as the culprit here. 

Formerly known on this forum as @fuchsr -- until all hell broke loose with the forum software...

Posted : 17/12/2021 5:44 am
Steverd liked
Steverd
(@steverd)
Trusted Member
Topic starter answered:
RE: Crazy external lines - Images

I thought the same thing as you about the Idler, but I will install the Bondtech tonight and print a wobble cube.

Thank you

 

Posted by: @fuchsr

Both my Minis have Bondtech extruders. Never had to adjust the idler again, never had a clog. So I definitely recommend it. Having said that, I have a hard time seeing the idler as the culprit here. 

 

Posted : 18/12/2021 12:13 am
StinkyPete
(@stinkypete)
Trusted Member
RE: Crazy external lines - Images

I saw something similar with my Mini (Bondtech Exrruder and Heatbreak) when trying a new PLA.   I ran a Temperature Tower, and found that the problem went away with a higher nozzle temperature, so I am now running 235 degrees with this particular PLA and am getting VERY good prints.  The high temperature worried me at first, but after some months using that setting I have had no issues and prints remain excellent.

Posted : 26/12/2021 8:46 pm
Steverd liked
Steverd
(@steverd)
Trusted Member
Topic starter answered:
RE: Crazy external lines - Images

Great tip - I will do this if the problem returns! Thank you

Posted by: @stinkypete

I saw something similar with my Mini (Bondtech Exrruder and Heatbreak) when trying a new PLA.   I ran a Temperature Tower, and found that the problem went away with a higher nozzle temperature, so I am now running 235 degrees with this particular PLA and am getting VERY good prints.  The high temperature worried me at first, but after some months using that setting I have had no issues and prints remain excellent.

 

Posted : 26/12/2021 9:39 pm
sandysasmita
(@sandysasmita)
Estimable Member
RE: Crazy external lines - Images

Have you tried to use another filament? Or have you try to drying your filament? I have this problem before, and the only solution is dried my filament. I live in moist environment, its about 75% humidity, so if let the filament in the open air, a few days later the print results is terible. So i have to dried the filament or i use filament dryer while printing. Here is sample image similar to yours. The left side is moist filament, after drying my filament, the layer lines going to disappear.

Posted : 28/12/2021 5:23 pm
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