Bridge Spiral Test - 5axes/Calibration-Shapes GitHub Wiki

This is an elegant Bridge test. The initial design has been slightly modified to add the distance from the bridge on each branch.

Bridge Spiral test

SCAD Model Bridge Spiral test

Bridge Spiral test

Licence for the Customizable Bridge test : CC BY-SA 3.0, Neon22 https://www.thingiverse.com/thing:912248

Printing Conditions

 - Nozzle Size : 0.4
 - Layer Height : 0.2
 - Initial Layer Height : 0.2
 - Line Width : 0.4
 - Wall Line Count : 3
 - Top/Bottom Thickness : 0.8 mm
 - Enable Bridge Settings : True

Printing Time = 45mn

Instructions

Print and observe the overhangs. Cura offers a number of ways to improve bridge crossings. First, check if the Enable bridge settings option is enabled.

When configuring the bridge parameter to reduce deflection, you can tune these different settings :

  • Reducing the printing temperature makes the thermoplastic more viscous, which reduces sag.
  • Reducing the layer height or line width reduces the pressure with which the material is pushed out of the nozzle. This in itself reduces the sag further by extruding less material, making cooling more efficient.
  • The reduction of the flow is similar to the reduction the line width. This will reduce the pressure and the amount of melting plastic, allowing the material to solidify faster. This setting can also be adjusted only for the bridge areas, separately for the material flow of the bridge walls or the material flow of the bridge skin.
  • Reducing the printing speed also reduces the pressure with which the material is pushed out of the nozzle. It should also be noted that the fans blow on the material longer, which also increases their efficiency and reduces sagging. If the bridge settings are activated, the printing speed of the bridges can be set separately. Reducing the printing speed of bridge walls is effective for improving sloped overhangs.
  • Increase the fan speed to cool down the material faster. This solidifies the material faster, preventing it from sagging.
  • And finaly printing the walls from inside to out. This will allow the outer wall to press against the adjacent inner wall, preventing it from falling off.