17
Troubleshooting a fully custom build
(lemmy.world)
Hey y'all, I managed to hack together a printer from scratch and I'm struggling to get it to print well. It's a CoreXY system that's being controlled by a Octopus 1.1. Dual z screws, the works.
I have it moving under it's own power and all. It's able to actually print, but the results are atrocious.
I'm just trying to diagnose what's wrong here.
The bottom/first layer actually looks kinda good. It's just completely shredding subsequent layers.
Any advice would be appreciated!
This is quite toasty, at least for the PETG I print. I'm usually at around 240 for my first layer and 230 or 235 for all subsequent layers.
Have you run a temp tower?
https://ellis3dp.com/Print-Tuning-Guide/articles/extrusion_multiplier.html for more info. In a nutshell, you lower it for oozie filament and increase it for more viscous filament. For PETG I lower it some, but the exact amount varies by filament brand and color.
That said, I don't think this is your issue.
I haven't run a temp tower. I'm not fully convinced that it won't damage itself so I've been trying to think through it before trying another print.
If you are suffering a clog and/or under extrusion issue the worst I've ever seen happen on my printers is the extruder clicking because the e-stepper is trying to step, but can't. It might not be a bad idea to go over all the connectors in that path. When I finished building my Voron one of the factory terminals in the LDO stepper's connector had a terminal that was backed out, causing weird extrusion issues.
The print before this one, the blobbing/shreds were tall enough that one grabbed the BLTouch probe and bent it a little. I was pretty mad about that tbh.
I'll double check my connectors. That's a solid shout actually.