@lord_daeloth thanks for your suggestion. I’ll try to do it! How did you solve the problem of aeration in the room in which you’re printing? I mean, I’ve got different printers in the same room and some of them are using ABS that’s not exactly healthy. My solution was to leave the window a bit open but considering what everyone is saying it’s not the best idea of ever.
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Agree with everything here, but when I looked at the gcode for the area of the problem, the layer height appears to change at a different position for each layer???
Hi Perry_1,
Thanks for your answer. On Monday, I’ll check if there is any mechanical issue with the printer but I’d say that the printer is working smoothly. I’ll also try to run again the same gcode file, in order to understand if the problem is due to an external factor or to a problem in the code/printer/material.
Federico
@remcokatz I’ve measured the filament in three random spots, the results are quite regular: 2.90, 2.87, 2.92 mm
Good luck with figuring this one out, let us know any developments! I know how frustrating troubleshooting can be, particularly less obvious symptoms, and especially when it ruins long runs!
If the print was sitting inside the printer as per the second photo you printed, then that suggests that the failed part was at the back, so localised heating issues would seem to be unlikely. Also, only one leaf appears to suffer from this issue.
So, the only thing I can think of at the moment it to use the “cut off bottom object” feature of Cura (15.0x) and start printing from just below where the problem started, and then watch what’s going on. Ideally, video it as well, and make the video very steady. Then we might be able to diagnose the problem from that, or you might do so yourself just by observing what’s going on.
I’ve looked at the G code and there are no extruder retracts or Z hops near the locations where the defect is. The extrusion proceeds smoothly from the
sides right across the face where the defect is. The print looks like the extruder is starved of material in that zone of the print. Since it does not seem to
occur randomly but repeatedly in that one zone it might have something to do with the filament binding when the head moves into that particular location in
that particular direction at that particular height. Once the head is out of that zone the filament moves freely again and the starved extruder issue goes
away. My guess is the wire cable is stuck behind the filament spool and is causing drag on the spool and/or the filament path where it should not be. See the picture.
I drew a red circle on the picture but its hard to see.
Here’s a better picture.
Hi n23d,
Thanks for your feedback, I really appreciate your effort! I’m having more issues with the Ultimaker 2+, right now it’s almost not extruding material anymore. The cable isn’t stuck behind the filament spool: I suppose that there is some kind of deposit of PLA inside the hotend. I tried the “Atomic Test” and that’s the result: as you can see, the issue it’s not in the nozzle or in the filament but somewhere in the hotend. I’ll check it and I’ll update you about the situation
A lot of blind guessing in these replies…
This is a warping problem, caused by the plastic not having cooled down enough in that area when the next layer is deposited. It most likely happens in the sides facing away from the fans. So probably the temp was a bit too high, and slowing down will also help.
I also see that the infill is clearly visible in some parts of the shell. Better set shell to 0.8, that will help. And if you set fill to 100% that problem will definitely be gone. Print time will be longer, but it’s a long print anyway…
Shell was already set to 0.8. Print a lamp with a fill of 100% it’s super long and a waste of material honestly.
In that case, perhaps the infill overlap was set too high ? These lines from the infill shouldn’t be visible through a 0.8 mm shell…