3DPrinting

It has to go with the brain...

This was the second half of my problem honestly, I can't for the life of me figure out how to 3d model stuff. I've gone through tutorial after tutorial so clearly it's me.

I actually have stuff I'd like to print but I'm not competent enough to model it. I'm the n00b just printing stuff I can download from the internet. Or was I suppose....

Honestly at that point I would tear down the whole thing and use this video as a guide for reassembly. The most important thing to do is to make sure the framework is all squared up, otherwise all prints will suffer.

As for bed leveling... A lot of people think the paper test is all you need, but really that only gets you close enough to start leveling the bed. First thing is to tighten all the springs to within 1 turn of being closed, then adjust the Z switch so that the head homes to roughly that same height. After that you use the paper method to get the bed roughly level, then move on to live testing with a 5-point bed-leveling test print to dial it in. Ideally you want the nozzle gap to be about 75% of the nozzle size, so for a 0.20mm tip you would want a 0.15mm gap to get your print to stick.

As I mentioned to someone else, Creality's QC is garbage. My first glass bed had better adhesion than PEI and worked beautifully for a few years until the coating wore out. My second glass bed was trash, I never could get anything to stick to it without using hairspray, and now it sits in its box. I have a PEI bed now, which seems to have solved the problem. If you decide to try using the printer again, don't forget to clean the glass with 90% ISO. Worst case try flipping the glass over to the smooth side, clean it with ISO, then use glue sticks on that surface (you won't get any adhesion on bare glass without the glue or hairspray).

One thing I learned is that Creality's QC is absolute garbage. When I first got my printer I also picked up a glass plate. Everything stuck perfectly to it, hardly any fuss at all. After several years the coating wore out and I bought a new one. Total trash, nothing would stick without heavy usage of hair spray and I eventually gave up on it.

If you want to try again, look for PEI beds. If you have one with the magnetic base, there are several with the PEI already mounted on a spring-steel plate. PEI is one of the best surfaces you will ever find to print on, although I believe one type of filament (I think a variation of PLA?) sticks too well and can damage the PEI trying to take prints off... but I've used regular PLA, PLA+, and TPU with great success, and have heard that ABS also works well on it. Just keep it clean with 90% ISO and you'll eliminate at least one problem.

Of course there's also the whole thing with bed leveling. I run into a lot of people who think the paper method is the whole process for leveling, when really it's just to get your printer dialed in close enough that you don't ruin the bed when you actually begin to do the leveling. Getting the leveling wrong is by far the most common reason why prints don't stick well so do your best to nail that aspect. You want the nozzle gap about 3/4 of the nozzle size, so for a standard 0.20mm nozzle you would want a gap of about 0.15mm for your first layer (but still use 0.20 in the slicer) to get that proper smoosh. My leveling method involves using a 5-point bed-leveling test print, and you can judge the gap by eye from that. Takes quite a few iterations to get all the corners dialed in, but you shouldn't have to do it often.

Speaking of which... another common complaint is the loose bed springs. You want to Crank those puppies down almost completely closed, then adjust the Z switch to that new position before starting the leveling. Tight springs means you almost never have to readjust the leveling knobs. I check mine about once a year.

That's why I always recommended a Prusa Mk3 to beginners, if their budget allowed it.

Stuff like auto bedleveling is just too good to not have.

I set up and calibrated my Mk3 in beginning of 2020, and I never had to fiddle with anything on that machine again. It just prints.

Assuming proper level, mess with temp settings and maybe try a layer of glue stick glue. Helps big time with first layer adhesion but it gets messy if you don't clean it off. Though my bed is a mess and it still prints OK lol.