Submitted 8 months ago by franzfurdinand@lemmy.world to 3dprinting@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!
Partial clog, possibly due to not a high enough extruder temp.
Do a few cold pulls and bump your print temp 10
I’d be surprised if it was too cold, but I’ve heard stranger. This is PETG at 250. I’ve actually pulled the nozzle and Bowden tube and pushed a very small Allen key through, so it shouldn’t be clogged.
Z height is calibrated, and I’ve calibrated the e-steps for the z axis. I’ve tried disabling the fade height to see if that was doing something but it didn’t seem to make a difference.
I ran through calibrating the extrusion e-steps. It’s feeding 100mm when I tell it to do so. I haven’t messed with the extrusion multiplier, do you have any information about that?
250 for PETG
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?
I haven’t messed with the extrusion multiplier, do you have any information about that?
ellis3dp.com/…/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.
You z-step might be off. I.e. z i mooving too far each layer.
I think you might be onto something but the other direction. I think it’s not moving quite enough per layer.
If you’ve not done a full calibration? If not, start and work the process. Take your time with it, do each step multiple times.
teaching tech has a good guide on it,
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IMALlama@lemmy.world 8 months ago
Have you verified that you can extrude filament with the extruder stationary and a decent height above your bed? While you’re at it, you might as well do e-steps.
franzfurdinand@lemmy.world 8 months ago
Yep. I calibrated all the e-steps too. Not just the extruder, but the the movement e-steps as well.
Shadow@lemmy.ca 8 months ago
Yeah this is a good call to check. Can you even just squirt filament into the air consistently?
franzfurdinand@lemmy.world 8 months ago
Yep! It actually extrudes just fine. I’m starting to wonder if maybe my z axis e-steps are just slightly off and it’s enough to compound over the course of the print. It seems to hit a certain spot and start grinding itself into the print, which suggests that it might not be moving up enough per layer.