My nozzle stole my print
Hi, so I recently got back into 3D printing. Re-configured my v-core 3.0 500. And my nozzle seems to be stealing my print? I don’t think the layers are adhering properly or printing properly, as I tried to print a calibration cube and the perimeter seems a little thin, and the first layer seems to have not printed very well at all. The first picture shows the print after I stopped it on klipper. Printing with PETG @ 250C extruder and 80C bed temp. Might be a slicer issue but I’m not too sure, I’m using SuperSlicer if that helps, thanks!
Also I’d like to add, I’m using a 0.4mm nozzle, 0.3mm first layer and the rest at 0.2mm. Maybe it’s a z-offset issue? Not sure, if anyone could help I’d appreciate it
13 Replies
It does seem like z-offset issue, I would re-calibrate it and print first layer calibration with baby steps.
Do what cgrr said. If that doesnt fix it:
Since you got back into printing, is your PETG old? maybe you need to dry it (espeically when you hear popping noises during printing)
Double check your flow / extrusion multiplier settings.
Thanks both, i'll give this a try and see what happens. My PETG is kinda old but i'm not hearing any popping when it's printing, but i could try drying it to see if it will help. I followed the klipper guide for doing flow (i think it was anyway?) and the rotation_distance stuff and that seemed fine to me, is there anything else i need to look at flow/extrusion wise? Thanks again :)
just make sure its set close to 1 in your slicer, most likely its a z-offset issue. Cleaning your PEI sheet with soap and water also helps, it looks a little dusty 😉
Seems like it was a z-offset issue. Changed it and now I’m actually printing woohoo. Next step is to give the bed a nice soak. Also checked my extrusion multiplier and it was set to 0.94, changed it to 1 (after the successful print). But uhh I’m having these problems now along all outside walls. Top isn’t as bad as I thought it would be but still not great
I’m assuming it could have something to do with the extrusion multipler so I’ll have to retry a print when I can apart from that I’m not sure what it could be 
Don’t want to dump too many problems here but I’m also having some issues with my Z axis where when I send the bed down, it makes this horrible almost scratching or like it’s catching on something. It only happens when it’s going down though. I’m guessing it’s just an alignment issue and I need to try and reseat everything. Sorry to dump all of this just want to get my baby back in working order, I appreciate all the help
Wow those side walls look horrible...
weird that your top looks very smooth and properly filled while those walls do not at all. Not sure what the issue is. At first i thought nozzle clog, pressure advance or flowrate issues, but all of those would probably produce a worse top layer as well. Maybe its a speed issue, what are your speeds? specifically outer walls and top layer?
These are my speeds: https://gyazo.com/ad929f755d5fd821349cbd2909184d8b
they came stock with the profile, maybe i need to tune them down a bit?
Gyazo
Gyazo
It doesn't look too fast if tuned, but you could try slowing it down to see if there are any differences.
Sry i didnt mean that its only a speed issue, but it kinda looks like that the slow parts printed fine (top surface, the Y corners and stuff.)
Maybe you have a partial clog in the nozzle, which could mean that when you print slow the flow is enough but any faster and flow is greatly limited. I mean you could try printing the cube again at like 50% the speed or do some flowrate tests (not extrusion multiplier but mm^3/s). or use a different clean nozzle if you have one
Perfect thanks, I’ll give this a go now, I should have a spare nozzle somewhere. Sorry for the late reply and again thank you for all the help
No worries 🙂 I hope that fixes it for you.
If it does post a pic of the successful print 😉
oh and disassembling the hotend and checking everything would also not hurt