3d printers are so simple to fix nobody is willing to repair them for money.

i got one fucking up on me. had a print come loose and clog the nozzle. plastic filled most of the head. destroyed a bunch of wiring getting it apart, but a lot was lost because it was filled with plastic. new covers, new fans, new extruder, new hot end. (everything but the head's frame and the pcb, basically.)
now it'll print like the test files that ship with the printer, and does a fine job, but on my own prints, i can't get the z-offset to work right. i do the stupid calibration, the auto bed leveling, then the stupid part with the card under the nozzle, and i keep coming up with the same number: -1.96mm. but when i try to print with that offset, it's dragging the nozzle through what it just laid down. it actually does the first layers and outer walls ok, but when it does infill it fucks it up.

>>2933905
>but when it does infill it fucks it up.
z anything cannot have an impact past the last bottom solid layer, your problem is something else

>>2933917
>your problem is something else
could be. the first few prints the bottom layers did come out fucked up. wavy & thin in areas.
i don't think i have the nozzle i think i have. if that makes sense. printer came stock with .04, but i think i replaced it with a .02. or maybe i didn't. but it's that, or i selected the wrong profile in my slicer - again, that would be a mixup between .02 & .04.
but what makes this all the weirder is that i have 2 of these printers, the same exact thing happened to both of them (plastic explosion inside the head) on the same print on the same day, and the other one is up and running flawlessly, cranking out good parts.
fml i guess.

>>2933929
>plastic explosion inside the head
that happens because chinks give 0 fucks on assembly and you didnt do your homework bruh.
It used to be mandatory to rebuild these shits from the ground up after opening the box, because desu a 3d printer is a sick piece of machinery that doesnt leave much room for error.
Try setting your sparse infill speed to the same as solid infill speed and see if it comes out right

>>2933932
>doesnt leave much room for error
those things are literally the most crude and primitive possible devices, you can get away with literally anything and usually don't even notice problems existed until you accidentially stumble upon them
those machines are the embodiment of 'screw rigidity and precision, the confuser and designing for the process will handle it'

>>2933935
no creality went out of its way to maje the crappiest shit possible.
si you unbox the 3d orinter right?
you open the glass, whats the first thing that happrns?
The screen falls off.
Thats the start of a long journey fixing that piece of shit.

>>2933932
>that happens because
they both had hundreds of hours of run time on them before it happened. 0 problems. the same thing happened to both printers at the same time. i'm more inclined to believe it's because i forgot to glue stick my build plate. but we can blame chinks if you want, sure.
>>2933935
not me
>>2933936
>creality
these are qidis. xmax-3. i also have two plus 4s that have been running flawlessly since ~jan/feb.

>>2933936
not in my case
more like
>buy 2nd hand anycubic thing
>dumb outta box
>gantry is bent the fuck out of, scew is off the charts
>ask seller - allegedly has no clue
>bend straightish
>hardcode skew and compile marlin2
>pimp her out and ride her till the wheels fall off
never gave me zero issues, except. for the not moving ultra slow thanks to 16 bit timers in mega2560 and the stepsticks only ustepping 16 - fixed that issue but its niche

>>2933942
anycubic wasnt on my radar nice.

>>2933935
>ose things are literally the most crude and primitive possible devices
Nope, just like on machining tools your standards are simply low and you'd be good with a clapped out 1920s watchmaker lathe. And the hotend pissing plastic is the embodyment of botched assembly

>>2933905
You have Z backlash problems, it's nothing to do with the print head at all.

>>2934061
>ad hominem
>zero argument
lel

>>2934094
>zero argument
ahem
>And the hotend pissing plastic is the embodyment of botched assembly

>>2933905
>infill
Your hotend nozzle combo doesn't have enough flow for the infill flow/speed you're using for that filament and temperature

That 72d tpu is so crazy, I wonder what it'd be like with CF