Bed Adhesion

Any features marked with a ⚠️ are still in development and are likely buggy or nonfunctional.

Brims

Brims are used to help with first layer adhesion. They’re easier to remove than a raft and take less time and material. Brims can be useful if you’re having trouble sticking your first layer to your build plate, or the corners of your print keep warping up.

generateBrim
Reasons to Use a Brim
  • Helps with first-layer adhesion

  • Provides time for nozzle to purge

  • Shows that your build plate is level

  • Keeps corners of print from warping

Reasons Not to Use a Brim
  • Brims waste time

  • Brims waste material

Brim Tracks

Brim tracks adjusts the number of tracks of filament printed around your model as part of your brim. The more tracks you use, the more adhesion you’ll get out of your brim.

brimTracksLow

Lower Numbers will result in fewer brim tracks around your model. This saves filament and time.

brimTracksHigh

Higher Numbers will result in more brim tracks around your model. More tracks can help with first-layer adhesion. Typically 5-10 tracks will be enough to ensure a good first layer.

Brim Layers

Brims can be printed on more than one layer to attach your print to the build plate even more firmly. Typically you should only print with one layer of brim.

brimLayersLow

Lower Numbers will result in the brim being printed on fewer layers. Typically brims are printed only on the first layer.

brimLayersHigh

Higher Numbers will result in the brim being printed on more than just the first layer. This will improve first-layer adhesion but can make removing the brim significantly more difficult.

This controls whether a brim is generated around the outermost corners of your print (the model’s convex-hull), or if it’s generated along all the edges of your print touching the build plate. If you don’t need the extra adhesion, turn this off to prevent holes in your part from being sealed up with a brim.

innerEdgesBrimOff

Un-checking this box will generate the brim only on the external perimeter of your print. This will prevent a brim from being generated inside smaller holes in your print, which could seal them off and make them difficult to clean.

innerEdgesBrimOn

Checking this box will generate the brim on internal holes in the print’s base, as well as the exterior perimeters. This can be useful if you have an especially large hole through the middle of your print and you’d still like the brim to help the edges of that hole stick to the build plate.

Rafts

Rafts are strong, thick platforms printed below your model, and provide better adhesion to the build plate. You should only use a raft if you’re seriously worried about adhesion. It’s common to use rafts when printing an object that has only a tiny surface area touching the build plate or when printing something very wide and prone to warping.

generateRaft
Reasons to Use a Raft
  • Helps with first-layer adhesion

  • Provides time for nozzle to purge

  • Helps compensate for un-level build plate

  • Keeps corners of print from warping

  • Helps keep supports on the build plate

Reasons Not to Use a Raft
  • Rafts can be hard to remove from your print

  • Rafts waste a lot of time

  • Rafts waste material

Raft Gap

This defines the distance between the top of the raft and the beginning of your part. The small gap will make removing the raft easier, but an especially wide gap can lower the quality of the bottom of your model.

raftGapLow

Decreasing the gap between the raft and your print will ensure the two stick together and that the first layer of your print comes out smooth. However, the improved adhesion can make it difficult to remove the raft when your printer is finished.

raftGapHigh

Increasing the gap between the raft and your print will make it easier to remove the raft. Too much of a gap can lead to poor adhesion between your model and the raft, as well as damaging the quality of your model’s first layer.

Raft Inflation

This adjusts how far beyond the edges of your print your raft will be generated. Typically making your raft a little wider than the base of your model can give you a handle to peal it off when your printer is finished.

raftOffsetLow

Lower numbers will make your raft finish closer to the edge of your print. This can make removing the raft slightly more difficult, but will save printing time.

raftOffsetHigh

Higher numbers will extend your raft further beyond the edges of your print, making it sturdier and giving you a way to grasp it to tear it off your model. This will increase the printing time of the raft, however.

Raft Base Layers

This lets you adjust the number of taller and wider base layers in a raft before the the top is started. These ensure good adhesion to the build plate.

raftBaseLayersLow

Fewer base layers will save print time. However, these layers are what give your raft its extra adhesion to the build plate, and removing them can reduce that benefit of a raft.

raftBaseLayersHigh

More base layers will take longer to print, but will ensure your raft sticks well to the build plate. It’s typical to have three raft base layers on most prints.

Raft Base Layer Height

This adjusts how tall the base layers of your raft are. The smaller your nozzle on your printer, the smaller its maximum layer height is. Typically base layers should be slightly taller than your normal layer height to provide extra adhesion to your build plate.

raftBaseLayerHeightLow

Thinner raft base layers are compatible with smaller nozzle diameters. Regardless, it’s typical to print raft layers on the thicker side of what your nozzle can handle. Note that some HotEnds can’t extrude filament fast enough to handle printing exceptionally wide rafts (and thicker base layers exacerbate this problem).

raftBaseLayerHeightHigh

Thicker raft base layers will adhere to your build plate better and make your raft sturdier.

Raft Base Track Width

This adjusts the width of the base layers of your raft. The smaller your nozzle on your printer, the smaller its maximum track width is. Typically base layers should be slightly wider than your normal track width to provide extra adhesion to your build plate.

raftBaseTrackWidthLow

Skinnier raft base layers are compatible with smaller nozzle diameters. Regardless, it’s typical to print raft layers wider than the rest of your tracks.

raftBaseTrackWidthHigh

Wider raft base layers will adhere to your build plate better and make your raft sturdier.

Raft Top Layers

This adjusts the number of top layers in your raft. Ensuring that these top layers are printed smoothly will help your model to start well on top of them.

raftTopLayersLow

Fewer top layers will save you print time, but may reduce the quality of the bottom of your model. Make sure that the top of your raft comes out smooth so that the first layer of your model can rest on it smoothly as well.

raftTopLayersHigh

More top layers will improve the quality of the first layer of your model, at the cost of print time. It’s typical to have around three layers to properly bridge the raft’s base.

Raft Top Layer Height

This adjusts the thickness of the top layers of your raft. These are typically roughly the same as your normal layer height.

raftTopTrackThicknessLow

Thinner top raft layers are compatible with a wider range of nozzle sizes.

raftTopTrackThicknessHigh

Thicker raft top layers will support your model’s first layer better, improving its quality.

Raft Top Track Width

This lets you adjust the width of the top layers of your raft. Typically the top of a raft should be printed as wide or very slightly wider than your typical extrusion width.

raftTopTrackWidthLow

Skinnier raft top layers are compatible with smaller nozzle diameters.

raftTopTrackWidthHigh

Wider raft top layers will support your mode’s first layer better, improving its quality. You don’t need to have top layers be quite as wide as the base layers.