The printer arrived in a flat-pack of aluminium extrusion and a bag of bolts, and a sensible person would have read the whole manual first. I am not that person, so I had it half-assembled before I realised I'd skipped the bit about squaring the frame. Took it apart, did it properly, and that was lesson one: with these machines the mechanical bit underneath dictates everything the software does on top.
First print was the obligatory test cube. It looked like a cube that had been left out in the rain. The corners curled up off the bed, the first layer was a series of disconnected sausages, and about a third of the way up it turned into a bird's nest. Classic adhesion failure, classic everything failure, really.
the first layer is the whole game
I spent an embarrassing amount of the first week just on getting the first layer down. Everyone tells you this and you don't believe them until you've watched twenty grams of PLA peel off the bed and start dragging around the nozzle.
What actually fixed it was boring and methodical:
- Level the bed cold, then again warm, because the aluminium moves as it heats.
- Set the nozzle gap with a single sheet of paper, just enough drag to feel it.
- Drop the first-layer speed right down so the plastic has time to stick.
- A wipe of the glass with isopropyl, no fingerprints, no grease.
Once the first layer goes down as a solid, slightly squished sheet rather than a row of strings, most of the drama goes away. The print either sticks for the duration or it doesn't, and it almost always does now.
temperature towers and patience
The second failure mode was stringing and blobbing, those wispy hairs strung between separate parts of a print. The fix there was a temperature tower, a single model that prints each section a few degrees cooler than the last. You run one, look at which band came out cleanest, and that's your number. For this roll of PLA it was 205, a good fifteen degrees below the 220 the spool optimistically suggested.
Retraction settings were the other half of it. Too little and you get strings, too much and you get under-extrusion and clicking from the extruder as it chews the filament. I landed on a millimetre of retraction at a moderate speed and stopped fiddling, because the temptation to keep tuning forever is real and the gains get small fast.
the part that surprised me
I expected the failures. What I didn't expect was how good it feels when one finally works. The first part that came out clean was a small bracket to tidy the cables behind my desk, the dullest object imaginable, and I sat there grinning at it like I'd forged a sword. There's something genuinely satisfying about needing a thing, designing it, and holding it twenty minutes later.
A week in, the box of failed prints is bigger than the box of good ones, and I'm completely fine with that. Every one of the failures taught me something a successful print wouldn't have. Next up is petg, which everyone warns me is fussier, so the spaghetti box will doubtless grow again before it shrinks.