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3d printed columns are printing really bad (Prusa i3 - not ultimaker)
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· 3d printed columns are printing really bad (Prusa i3 - not ultimaker)
ABS has a temperature/density relationship such that it is less viscous at higher temperatures (like honey) and more dense at lower temperatures (like toothpaste).
260C is quite hot and dangerous in the sense that you can bake ABS into a gummy substance that will clog your nozzle so don't leave the nozzle that hot unless you are printing.
You should get better layer adhesion if you print with no fans or if you enclose the printer and then you can go to lower temperatuers but this is not what you are complaining about so let's leave it there.
I dont' know what is causing the "spirals posts" issue other than it's clearly underextrusion and you can get that spiral shape because the filament barely sticking out of the tube gets drawn out by the layer below so you get just a drop but it spirals around as each layer above it comes out further aroudn the spiral. Anyway this is severe underextrusion (getting only 50% or 25% of the filament you need to come out). But why only on the posts? I don't know. something about when it retracts and moves over to the posts - it must be leaking a bit and then there isn't enough filament to continue? Maybe increase your retraction distance to 3mm? I'm not a prusa expert. Don't have one. Maybe increase your travel speed? Try 300mm/sec for travel (non printing) speed so it leaks less on the way over there? Maybe you didn't slice those posts solid enough?
Did you set cura nozzle width to 0.5mm? If not that might explain your issue but I doubt it.
I have no suggestions for problem #2. Aren't there prusa forums somewhere?
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gr5 2,331
ABS has a temperature/density relationship such that it is less viscous at higher temperatures (like honey) and more dense at lower temperatures (like toothpaste).
260C is quite hot and dangerous in the sense that you can bake ABS into a gummy substance that will clog your nozzle so don't leave the nozzle that hot unless you are printing.
You should get better layer adhesion if you print with no fans or if you enclose the printer and then you can go to lower temperatuers but this is not what you are complaining about so let's leave it there.
I dont' know what is causing the "spirals posts" issue other than it's clearly underextrusion and you can get that spiral shape because the filament barely sticking out of the tube gets drawn out by the layer below so you get just a drop but it spirals around as each layer above it comes out further aroudn the spiral. Anyway this is severe underextrusion (getting only 50% or 25% of the filament you need to come out). But why only on the posts? I don't know. something about when it retracts and moves over to the posts - it must be leaking a bit and then there isn't enough filament to continue? Maybe increase your retraction distance to 3mm? I'm not a prusa expert. Don't have one. Maybe increase your travel speed? Try 300mm/sec for travel (non printing) speed so it leaks less on the way over there? Maybe you didn't slice those posts solid enough?
Did you set cura nozzle width to 0.5mm? If not that might explain your issue but I doubt it.
I have no suggestions for problem #2. Aren't there prusa forums somewhere?
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