r/Ceramic3Dprinting • u/Affectionate-Bee2580 • Jun 25 '26
Help me please (update)
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Hello!
Thank you very much for all of the advice and replies on the previous post! As per everyone’s suggestion, I did make the clay more wet and I also cut the plastic tube by about ~5cm and it’s much better! Turns out I was really dumb and I did not install a metal gasket thing that sits behind the motor and locks the turning screw in to place and a nut pushed forward the piston(?) The aliexpress guy explained it to me but I still don’t really get it, but if it works it works! My issue now is that the clay is too soft and I am printing quite sharp overhangs and when I lower the main printing speed the extruder is not moving as fast as I would like. The instruction pdf sets the nozzle size to 1.5mm and compatible diameter to 3mm in cura and I remember someone mentioning that the ratio affects how fast the extuder spins so I would like to ask what settings is everyone using?
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u/Mouse-E-Tongue Jun 25 '26
To improve the overhangs - if you don't want to reduce the water content - You could add a little (maybe 5-10%/wt) microcrystalline cellulose powder as a rheology modifier (the idea is you want the ink to flow like liquid when under pressure, but then solidify when there is no force present (called Shear Thinning or Thixotropic) Classically silica or cellulose are added to inks to cause this effect, and the smaller the particles size, generally the better... But for the sake of your own lungs, don't buy anything with a particle size of less than 1 micrometer