Hello everyone. We started to use A1 Mini in our office. For a calendar from homemade recycled papers project, we are printing stamps. We are using Bambustudio app for slicing and Porima PLA Premium filament. We are using tha app’s settings because they were working quite well for our models.
At first we just had small issues such as not sticking etc. (solved it with adding skirts thanks to this forum.)
Yesterday we had another issue. it leaves little particules while printing and sometimes nozzle does not let the filament go and it continues moving ith the nozzle. Adding some images and a video. Any sugggestions would be great. Same settings were working great until yesterday.
u might have to dry ur filament using a filament dryer (depends on the type of filament)
@NPC’s advice is good. Bet it’s moisture especially since you say the problem “came out of nowhere”. Prints that go from good to bad with nothing obviously changing is a red flag. But that also looks like it could be water anyway.
Are you drying the filament and how do you store it? How’s your humidity?
Filament is hygroscopic and pulls water out of the air over time. Different kinds of filament do it to different extents but all can show moisture issues with enough humidity.
Moisture in filament can cause pressure variations in the extruder. Some have noticed you can even hear popping and hissing in the extruder with wet enough filament.
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im quite new so i haven’t explored many filaments yet but i usually keep the sealed bag with the thing that absorbs moister and put the filament back in the bag when i know wont use it for a couple days its how i store is so far there’s probably beter ways to store it but i do 3d printing as a hobby so i dont have any complex tech. let me know if this doesnt make sense and ill rephrase it later and my average humidity rn is about 56% might be lower cuz im in summer rn
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Where you able to resolve this? I’m curious if it is moisture how I can avoid this as someone who doesn’t have humidity controlled filament storage
Let’s start from the beginning - all we know so far is that you use “premium PLA”.
It would be important for me to know, for example, at what temperature was it printed? As a rule, it should be around 220°C, but I also have some that I print much higher (I’m just saying Silk PLA).
What bed temperature?
What condition was the PLA in when it was made ready for use? (shrink-wrapped and vacuum sealed?)
It has already been mentioned here that it could be wet, especially if it has been lying around open for a long time…
Also interesting is the flow rate (which should be around 0.98).
To me, shooting from the hip, it looks like the following (in order of priority)
- massive over-extrusion (flow rate too high)
- Nozzle temperature too high
- Heating bed temperature (should be around 60 to maximum 70°C for PLA)
- Volumetric speed limit is far too high (should be a maximum of 21 mm³/s for PLA)
- Filament moist (I think rather less)
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The problem with that list is OP said they had printing sorted and then the prints started failing. The thing about settings is they don’t generally change over time unless someone changes them.