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We’re gonna need way more than that if we’re going to help you.
Edit: did naiboofTabr drop photos of the problem? on that assumption... how's you're layer adhesion generally? I would recommend testing that with a spiral-mode tower- take any solid shape- I use calibration cubes changed in the slicer to be 10x10x50mm and print it in spiral mode, testing layer adhesion by seeing how well the single perimeter is stuck- and also, filling it with water and checking for seeping. this also lets you check for flow settings and such.
if that test print comes out good, then, it's possibly being created by stress risers in the part itself. Specifically near where the bridges come down. As you drop each layer, it cools off, shrinking a bit, changes in cross section between layers, that force can cause it to be weak in that specific spot no matter how good your layer adhesion normally is.
The other thing I'm seeing is a nice long tall lever being printed on. While normally negligible, there is some pull as the nozzle moves over the part. Being tall and skinny like that turns it into a bit of a spring.
Assuming your layer adhesion is okay, I would suggest tackling the other two problems with a change in the part itself. increase the number of bridges connecting things, while also staggering their connections across the vertical axis. Also, consider changing the bridge's geometry. Another option here is, to instead angle the pillars so they criss-cross, becoming both the pillar and the bridge.
also, I would suggest checking your flow and estep calibration as well as running a temp tower if you've not done it. I like the teaching tech guides, and their troubleshooting section is also generally helpful.
Ender 2 pro, using PETG (offering to the goddess of spaghetti prints) https://previews.dropbox.com/p/thumb/ACCu0iDFgAuIf12PdScFyfgBu5f92ltGXkf1W5QuB2fjbNtB8FhegjBAwwp-GJOca2XoL1Sn1-iZr3xBdM53PAomijdgWT5Pq7PKfNAhlncv3fDX09iAugiLd21fyRRH4kLtYz0a8AP-mnf3KxyWpxQSDwPO84CBfgMF06nSeJk94lY3cXEm-ta6jOCNVKAEh89gbonYC0Hi5P6Pfj152R8cw_hkqJHFYFB0H8rN_MKM5dymh-BHanC_zCVMXgsvX41ocaOESlcHumvo0MVoyE19pcrEB7QYQhVvIAqdMO-PawYbS7t8AITZOpKqsR-SeX_LfRfYQ3NoylC1u8JFBAoU/p.jpeg
He did. The layer adhesion seems ok, generally? I'm still pretty new to all this. I'll give your spiral mode tower a test soon, thanks. I'm currently printing a temperature tower, so I'll see how that turns out too.
I could definitely add more bridges and stagger them like you said. The design was made by using slot cutouts in Fusion360. I'd have to play around with it to figure out how to alter the design for cutouts to form an x pillar/bridge combo like you mentioned.
Thanks for the help.
so, in f360, the way I'd do it is to create a is create a pair of pillars- one in each direction- then create patterns. use the combine tool to join them into a single body. Then I'd create the top and bottom of the box. When using the combine tool, I would advise not selecting 'keep tools'. this will help keep you from bogging down the computer and you can always go back in your history. (its a problem in f360 whenever you start going crazy with patterns. or patterns of patterns...)
but it should be okay if you stagger the braces, I've had some idiotic design choices myself. (including a spirally-fin-shaped lamp shade that would have looked sWeEt. like a long sort of jet turbine. except it was 200mm tall and the fins were bobbing and weaving. ooops. sometimes it's only obvious in retrospect.)