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tips_better_first_layers

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tips_better_first_layers [2025/10/04 00:08] – dshooptips_better_first_layers [2025/10/08 14:22] (current) – ↷ Links adapted because of a move operation dshoop
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 To understand what makes for good first layers we need to understand [[https://manual.slic3r.org/advanced/flow-math|Flow Math]] and the relation that layer height and extrusion width have to the surface area presented by the extruded filament against the build plate (or layer beneath, for layers after the first.)  To understand what makes for good first layers we need to understand [[https://manual.slic3r.org/advanced/flow-math|Flow Math]] and the relation that layer height and extrusion width have to the surface area presented by the extruded filament against the build plate (or layer beneath, for layers after the first.) 
  
-==== Tips ====+===== Tips =====
  
 === Make sure the bed is level === === Make sure the bed is level ===
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 From the Slic3r docs: "Having a level bed is critical. If the distance between the nozzle tip and the bed deviates by even a small amount it can result in either the material not lying down on the bed (because the nozzle is too close and scrapes the bed instead), or the material lying too high from the bed and not adhering correctly." From the Slic3r docs: "Having a level bed is critical. If the distance between the nozzle tip and the bed deviates by even a small amount it can result in either the material not lying down on the bed (because the nozzle is too close and scrapes the bed instead), or the material lying too high from the bed and not adhering correctly."
  
-=== How to tell if the bed is level ===+== How to tell if the bed is level ==
  
 To tell if the bed is level execute the following gcode in the [[Fluidd]] [[console]]:  To tell if the bed is level execute the following gcode in the [[Fluidd]] [[console]]: 
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 </code> </code>
  
-You can also include the same gcode in the [[slicer]]'s machine print start gcode or Klipper's [[PRINT_START]] macro. If the bed isn't level the print will stop. +You can also include the same gcode in the [[slicer]]'s machine print start gcode or Klipper's [[print_start_macro]]. If the bed isn't level the print will stop.  
 + 
 +==== Properly set z offset ==== 
 + 
 +A well set [[z_offset]] is critical for layers to bond and that extends to the first layer bonding to the build plate. It can not be properly set with the paper method. 
  
 ==== Slower First Layer Speeds ==== ==== Slower First Layer Speeds ====
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 The fatter the extrusion with the more material will touch the bed and the more surface area it will have to grip the plate. Increasing the first layer line widths above 200% is canonically recommended yet the percentage is based off layer height so unless you're also using thicker first layer heights as well keep the value above 0.42mm minimum. Setting to fixed 0.46mm rather than a percentage is easier in practice.  The fatter the extrusion with the more material will touch the bed and the more surface area it will have to grip the plate. Increasing the first layer line widths above 200% is canonically recommended yet the percentage is based off layer height so unless you're also using thicker first layer heights as well keep the value above 0.42mm minimum. Setting to fixed 0.46mm rather than a percentage is easier in practice. 
 +
 +==== Increased Temperatures ====
 +
 +"The extruder hot-end and bed, if it is heated, can be made hotter for the first layer, thus decreasing the viscosity of the material being printed. As a rule of thumb, an additional 5°C is recommended."
  
 ==== Avoid crossing perimeters ==== ==== Avoid crossing perimeters ====
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 ==== No Cooling ==== ==== No Cooling ====
 +
 +"It makes no sense to increase the temperature of the first layer and still have a fan or other cooling mechanism at work. Keeping the fan turned off for the first few layers is generally recommended."
  
 No cooling for the first [few] layers.  No cooling for the first [few] layers. 
  
 ==== If first layer heights are thicker and perimeters are fatter coinsider reducing first layer walls ==== ==== If first layer heights are thicker and perimeters are fatter coinsider reducing first layer walls ====
/app/data/attic/tips_better_first_layers.1759550902.txt.gz · Last modified: by dshoop
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