Anyone know what could be causing this?
Posted Jul 28, 2021, 4:24 AM UTC
711
The usual cause is too close to bed, but look at the area to the left. That looks good. And thats at the same height I think. Notice that the curling starts where there are long continuous runs. Try tuning your PID. Long runs demand more filament and filament cools the nozzle, which then heats up to catch up and can actually go overboard if the PID isnt set for that temp. Too hot a nozzle can cause this curling up too. (Heat increases flow as well-oozing on the fly) You could also try printing 5 degrees cooler. Also check your esteps and flow calibration. It could be that a long run magnifies the errors. And too much is coming out.(which is kinda the same as too close; in other words - too much filament for the gap)
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Very informative, thank you!
I'll look into the PID thingy later today.
It may just be too close to the bed, as I lowered it a tiny bit because of poor bed adhesion.
I have done an estep calibration, but I didn't have a digital caliper so it may not be 100% accurate.
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Definitely get some calipers - they don't have to be expensive ones to do the job You will need them to test filament thickness, line width, overall dimensional accuracy, esteps and even if your bed if actually flat. They also help squaring up the machine.
We are frequently dealing with distances of .05 mm in this sport - a caliper is the only way to be accurate at these scales.
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Yup. Nozzle too close. Causes the filament to squish and spread to much, displacing the filament already laid down, and causing this texture. Like not enough squish, it can also result in poor adhesion.
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Clean bed with alcohol
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I do that every third print or so, but can a non-clean bed really cause this?
I can see it causing this if there were a ton of residue left from previous prints, unless I'm missing something?
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That or moisture in filament. I get wrinkles like that when it’s not clean
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just go to tune while printing and babystep and raise it by 0.1mm or more . Fixed
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It's pre-heating now, and I'll try raising it by .05 first and keep going if needed.
Thanks.
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nozzle too close to bed its causing the filament to curl up like a u on the first layer, this makes lines in the 2nd and 3rd layers.
I think I understand what you're saying.
I'll try increasing it a little bit.
Thanks for the tip!