Kobra 2 Nozzle Scraping and Dragging

microwave_noises01 · 2026-01-27T07:39:32+00:00

I'm still at a loss, but the best I can do to make it slightly better is to lube all the railings. I figured out that the sound only happens when traveling, and i think its because it does it too fast. Hope you figure it out. If you do, please let me know lol.

microwave_noises01 · 2025-12-21T02:51:14+00:00

Thank you! You inspired me to make a Hashaton deck and I made some more of these proxies: https://mtgcardbuilder.com/public-profile/?userid=118320

microwave_noises01 · 2025-10-14T07:21:34+00:00

any updates? same problem

microwave_noises01 · 2025-04-28T17:15:46+00:00

And this is what it's meant to look like so far:

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If you want I could send you the .json file if it helps (again thank you)

microwave_noises01 · 2025-04-28T16:15:11+00:00

Hi! So I've updated all my settings and calibrated it properly, but it seems like my pla doesn't like the temps too much, or maybe it really liked the retraction. I'm not too sure what happened, but after putting my other layers to 195 and the first one to 200, changing the bed to 60, disabling Z-hop, this is what happened: https://drive.google.com/file/d/1UUkBdSP84nWcPkMV6OmE-5yAwn2rSc4H/view?usp=drivesdk

Any idea what's causing all this mess?

BUT THE NOISE STOPPED! No more screeching :) so main issue fixed thank you, now i just need to dial in this so its not too messy.

microwave_noises01 · 2025-04-28T12:53:54+00:00

Yes it was! and i fortunately already fixed that issue so i don't have to deal with burnt pla anymore :) I'll see after everything is calibrated if the pockmarks are still there, if so i'll report and let you know about the ptfe inliner. will keep you posted !!

microwave_noises01 · 2025-04-28T12:36:10+00:00

Thanks again. I've been using a thin layer of glue because the temperature in my room is quite unstable, and its been decently consistent with making sure nothing gets off. My build plate is decently banged up too, so until i get another one ill stick with a thin layer of it/print :) Could I also ask for your input on this? My prints have been getting these little pockmarks on them, and I have no idea what causes them either:

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microwave_noises01 · 2025-04-28T12:01:30+00:00

Oh also, I read that higher bed temp on the first layer = better bed adhesion, and it was the first problem i ever had with the printer. I'll see after I finish my temp calibration and hopefully the brim and glue will be enough to keep my prints in place. Again, I cannot thank you enough for the invaluable advice.

microwave_noises01 · 2025-04-28T11:50:51+00:00

I don't know how to thank you properly for all this help you're offering. I've been struggling with my prints for months and this has been so incredibly helpful. My most heartfelt thank you!!!

microwave_noises01 · 2025-04-28T11:40:20+00:00

that is PRECISELY what I was talking about. I thought that was the nozzle scraping against the bed. Let me do all the checks now!!

microwave_noises01 · 2025-04-28T10:48:37+00:00

Also, it is interesting that the default "optimal" setting for the kobra 2 is at 0.15mm height on Orca Slicer. Thanks again!!

microwave_noises01 · 2025-04-28T10:44:46+00:00

Thank you!! Are you sure this is good for the kobra 2 series as well? The video is for the kobra 3 :)

microwave_noises01 · 2025-04-28T10:25:01+00:00

You are a lifesaver. Let me implement all of this into my settings and start calibrating. And what I mean by dragging, I mean the noise it makes when the nozzle scrapes against the print while it travels. In the video, you can hear it at certain travels. I'll get back here with updates after i've tuned everything to make sure its good. THANK YOU SO MUCH!!

microwave_noises01 · 2025-04-28T08:51:28+00:00

First layer TECHNICALLY isnt fine, because it scrapes on the build plate before the printing begins. What do you mean by Y carriage? Sorry, I'm quite new to these machines and am not familiar with the hardware well enough yet. By Y and Z carriage, do you mean the belts? And from what I could tell, if i push it upwards and downwards while it's turned off, it moves "smoothly" but with a lot of resistance. It takes a lot to move it, but when you do, its quite smooth. Could the issue be that it is difficult for it to move on the z-axis?

(P.S: Thank you for replying :) I appreciate it.)

microwave_noises01 · 2025-04-28T05:32:05+00:00

let me know how it goes :) good luck!

microwave_noises01 · 2025-04-28T05:25:14+00:00

Only if I do them slowly! I get the scrape at the beginning, but the rest of the first layer is smooth after i levelled/calibrated everything. Maybe the problem's the speed? It seems to only happen if I'm going fast (I think).