I am currently printing a simple cup out of PLA (I will later anneal it). My nozzle is 0.8 mm and I'm using a 0.4 mm layer height. Unfortunately, the layers keep separating. They don't detach completely, but there are 1 layer-tall, 3-7 mm wide gaps. I increased the temperature, since my speed is 100 mm/s. I also tried decreasing cooling and increasing the flow. This only helped a little bit.
Moreover, small increases in the temperature like 230/240 °C didn't work and now I have to use 270 and even 280 °C, which is crazy, considering my layer height is 0.4 mm. Is there any easy solution that will increase the quality?
- Material: PLA
- Layer height: 0.4 mm
- Nozzle: 235 °C first layer, 270 °C for the rest.
- Bed: 60 °C
- Cooling: 62 %
- Speed: 100 mm/s
I have noticed that 280 °C is better for large prints (large area, not height) and small prints look better when I change the temperature to 240/250 °C. This is how my prints look by now. The extrusion is very inconsistent, with overextrusion in the middle of the layers and gaps in the corners:
I suspect that the layer lines are not parallel to the heatbed and are over extruded, because of the high temp. I lowered it to 230 °C and there was no drooping/over extrusion, but there were more 'holes'.