3 ms·
It looks like it works not by constantly underextruding, but only intermittently. The parts where the strands join are overextruded if anything.
by himinlomax 6y ago
It looks like it works not by constantly underextruding, but only intermittently. The parts where the strands join are overextruded if anything.
- lylecheatham 6y agoI'm pretty sure it's actually just a continuous under extrusion. It becomes periodic in nature because material gathers under the nozzle and then it hits the blob from the previous layer and gets pulled off. It's a similar effect to how droplets form and fall off of your faucet when the flow rate is low. This also leads to the diagonal angles seen as the Z-height goes up. It's usually hard to get this to happen consistently, which they've done quite well. I've got no citations, but I worked in FDM Additive Manufacturing for a few years, and spent 4 months of that designing extruders for a name brand company.
- londons_explore 6y agoWhat surprises me is quite how consistent it is. The blobs look perfectly consistent over thousands of layers, which seems very unlikely - even a tiny perturbation would grow bigger in each successive layer and eventually cause the blobs to be chaotic in nature, even if the first row was consistent.
- himinlomax 6y agoI wouldn't be so sure, I saw a video of variable infill extrusion and it looked somewhat like this, although over a greater distance but otoh much faster. Speaking of which, it seems to be printing quite slowly.