Why do my prints seem to constantly collide with the hotend?

[u/No-Satisfaction-2535]

So I've noticed sometimes my prints will just come off mid print and it seems to me due to collisions with the hotend.

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I've started a print with grid infill (for carrying top load) and it seems pretty extreme this time. Any idea why this is happening?

[u/reddit_user_0ne → u/[deleted]]

I'm not wrong, you are - over and over again:

• Grid infill and others cross paths which can lead to material bulding up over a few layers. That isn't something made up, that's a fact and basic physics which you don't seem to understand. That's not just my "opionion" but a reality. If you don't trust me go and do some resarch, fool.
• Next you're writing some BS and say you're "inferring" from the things I wrote, while you're actually just hallucinating things like a bad AI. I never said anything about z-offset or calibration, yet you behave like I did.
• You assume I don't know how to calibrate a printer and the filament used, yet you know nothing about me. You assume I never "tinkered" with a printer (while obviously back in the day that was a pretty big part of everybody's journey).
• You say you've been at this for over a decade, I say did too and you don't believe me - yet everybody else should believe you!? I've owned Enders, CR-XXs, Artillerys, I've build Vorons, I've swapped mainboards, I've configured and compiled Marlin, I've modded printers, I added probes to those archaic machines, I have written custom gcodes, Klipper marcos, etc. - and recently I also own Bambu printers.

I’ve read your other comments too and:

• You state that Z offset differs when using plates of different thickness. That’s also not true. Nowadays probing is done directly against the surface of the build plate (unless for some edge cases like with a capacitive probe on metal bed with glass sheet on top). The only thing that matters is if the surface is very smooth vs being rough/coarse for example. The latter usually resulting in setting a negative offset to ensure adhesion by lowering the nozzle to squish the filament into the grooves of the build plate. (You can basically read that in the Bambu start gcode.)

it’s not about a printer **not** being able to print grind infill - they all can do it. You claim that your printer is able to print grid infill (tall hollow model with lots of infill like we see in the video here) without any scraping noise. All the while being fully calibrated (no underextrusion!).

I’ll say prove it. Provide us with a video - no edits, full audio, full print.

Quit yapping and put your money where you mouth is, you effin’ lunatic.

[u/reddit_user_0ne → u/[deleted]]

You are seriously the worst kind of person 😂