Shrink Line

shrink line lines on the part surface corresponding to changes in geometry how to identify shrink lines can be diagnosed as follows lines correspond to a feature change in the geometry lines can appear in any direction relative to the build platform lines do not have a sharp edge lines can often be seen but not felt cosmetic only cause cross section cross section solution print preparation or part design cause cross section cross section solution print preparation or part design troubleshooting it is recommended that you review all the possible solutions before taking action to ensure you are pursuing the best course of action if the best course of action is not apparent, try the troubleshooting options in the order listed refer part defects for more tips print preparation or part design adjustments the following solutions will address print or part related causes of the defects choose among the suggested actions below and select the best approach for your application usually only one type of adjustment is needed orientation cross section reorient part so the hero surface hero surface does not intersect the offending feature's cross section that is presenting the shrink lines reorient part so the change in cross section occurs very gradually supports may be needed with a new orientation design cross section redesign the part to add generous bevels or fillets to transition between cross sections gradually if problems persist, please reach out to carbon support mailto\ support\@carbon3d com explanation & causes explanation the process of polymerization produces heat as each slice cures slices cool after initial cure cooling rate is determined by cross section when cross section changes due to a feature change in the geometry, cooling will occur at different rates where the geometry changes smaller cross sections cool more quickly than larger cross sections causes print preparation or part design how the part is oriented , supported , or designed is causing the defect print preparation or part design cause root issue problem why defect presents cross section cross section changes suddenly smaller cross sections cool more quickly than larger cross sections when a sudden change in cross section occurs between slices, the change in cooling can manifest in a surface finish difference