1st print great, 2nd print cracking/seperation
Any ideas on what might be happening here?
1st print went great.
2nd print there was layer separation ~3/4 through the print.
The separation happened 10 layers after a bridging routine. I have a 4028 fan.
I thought I had it turned down but looks like not. it's running 100%. Does the excessive airflow and small part size cause the separation?
![No description](https://cdn.answeroverflow.com/1150558437151871047/PXL_20230910_220814376.jpg)
![No description](https://cdn.answeroverflow.com/1150558437487423588/PXL_20230910_220744727.jpg)
9 Replies
(PLA)
extended-salmon•13mo ago
May have been a clog that caused it to print "empty" for a layer or so.. if you are using an enclosure, are you keeping it open?
I'm not using an enclosure
it's open air in the garage
![No description](https://cdn.answeroverflow.com/1150829504986611753/PXL_20230911_162432447.jpg)
Similar outcome on another part
extended-salmon•13mo ago
Still looks like clogging to me. Too much retract or too weak heatsink cooling.
not sure if this helps but after the print, I was able to extrude filament without needing to take any steps to remove a clog
and another attempt with nozzle temp increased to 220°C was successful
useful-bronze•13mo ago
A nozzle clog can be partial (a bit of filament or dirt that’s not completely blocking the exit) and extruding filament outside of a print might appear fine in spite of the presence of a clog.
Does this mean you were able to reprint the part successfully at 220 or that the nozzle extrudes freely at 220?
I would follow the “cold pull” instructions from the Prusa KB to clear the clog. I agree it might be a partial blockage.
Can you print a test cube as well? The standard features make troubleshooting easier.
useful-bronze•13mo ago
Annex: https://github.com/Annex-Engineering/Misc_Designs/blob/e3fa169/3030_test_object/STL/Test%20cube%20logo%203030%2075deg.STL
Voron: https://github.com/VoronDesign/Voron-2/blob/3b4c0e4a4/STLs/Test_Prints/Voron_Design_Cube_v7.stl
GitHub
Misc_Designs/3030_test_object/STL/Test cube logo 3030 75deg.STL at ...
Misc Designs that dont have a home. Contribute to Annex-Engineering/Misc_Designs development by creating an account on GitHub.
GitHub
Voron-2/STLs/Test_Prints/Voron_Design_Cube_v7.stl at 3b4c0e4a4e8808...
Voron 2 CoreXY 3D Printer design. Contribute to VoronDesign/Voron-2 development by creating an account on GitHub.