wirlybird wrote: ↑
Thu Sep 05, 2019 9:53 am
When you reduce first layer height below 100% it also reduces the extrusion multiplier I believe.
Use the global offsets to get more squish.
I usually have my first layer height at 100-120% depending so to compensate for a bed that isn't perfectly flat in all areas.
When you increase the first layer extrusion width it also increases the spacing.
I think the idea of increased first layer extrusion width is to help get better adhesion with a wider extrusion.
If that's the case this feature is seriously broken. At the very least it should have a clear indication of what it does. For example, there's plenty of space there to show the adjusted extrusion multiplier value.
Now I am wondering if the "First Layer Speed" setting also has unintended consequences. This would actually explain some of what I am seeing. If that's the case I think the only safe way to deal with the first layer would be to create a new process with settings unique to the first layer and then add processes as needed to address the rest of the print.
I don't necessarily like the global offsets option because it shoves the entire part down by whatever amount you enter. In other words, if I am printing a part that is supposed to be 10 mm high, and I set a Z global offset of, say, -0.25 mm, my part comes out at 9.75 mm of height, at best.
One ought to be able to deal with the first layer without affecting overall part accuracy. And it should not be that hard.