First Layer Height setting?
I have now had some success printing with Prusa filament and then switched over to another brand. After a small test print to check that the settings worked, I started a print of a large, flat model. About an hour in to a multi-hour print, the corners were starting to warp and peel away from the bed. I stopped the print and let the bed cool. When I took the print off I noticed that the first layer is not very well adhered to itself. It's like a bunch of individual sticks of dry spaghetti laid down next to each other but not actually attached to each other. Any idea what might cause this? Thanks!
Re: First Layer Height setting?
Your fist layer is too high. Adjust live-z and push the nozzle closer to the bed.
Often linked posts:
Going small with MMU2
Real Multi Material
My prints on Instagram
Re: First Layer Height setting?
Your fist layer is too high. Adjust live-z and push the nozzle closer to the bed.
Interesting you should say that. I thought I had adjusted a variable for First Layer Height that would actually squash the first layer more, thus improving both bed adhesion and self-adhesion of the first layer, but I wonder if I mis-interpreted what the number meant.
In Slic3r PE, under the Print Settings tab -> Layers and Perimeters, the top section "Layer Height" has two options. The second one is labeled as "First Layer Height". In trying to improve bed adhesion and prevent corner warping, I changed this value from an absolute value to 90%, thinking that, by making it a thinner layer, it would stick better, both to itself and to the bed. I've since gone back to an absolute value equal to the default number listed for "Layer Height" in the line above it and have eliminated the problem. Can someone explain what this "First Layer Height" variable is and how it works as a percentage? Thanks!
Re: First Layer Height setting?
Interesting you should say that. I thought I had adjusted a variable for First Layer Height that would actually squash the first layer more, thus improving both bed adhesion and self-adhesion of the first layer, but I wonder if I mis-interpreted what the number meant.
Best practice is always to watch the first layer and adjust accordingly. It's one of the most important layers in your whole print process.
In Slic3r PE, under the Print Settings tab -> Layers and Perimeters, the top section "Layer Height" has two options. The second one is labeled as "First Layer Height". In trying to improve bed adhesion and prevent corner warping, I changed this value from an absolute value to 90%, thinking that, by making it a thinner layer, it would stick better, both to itself and to the bed. I've since gone back to an absolute value equal to the default number listed for "Layer Height" in the line above it and have eliminated the problem. Can someone explain what this "First Layer Height" variable is and how it works as a percentage? Thanks!
90% means 90% of the layer height. Means if you print with 0.2, you will get only 0.18. Thinner layer means less contact with the bed -> less adhesion. That's why you're getting with brim more contact and better adhesion.
Depending on how well your bed is level, you want to have at least 0.2 layer height for the first layer. Hope that helps.
Often linked posts:
Going small with MMU2
Real Multi Material
My prints on Instagram