Excess Resin

excess resin shiny patches on parts or clogged gaps how to identify excess resin can be diagnosed as follows shiny or glossy patches inconsistent surface sheen clogged gaps in a lattice this defect is related to the salt baked into part docid\ rbf4ep 02b6octr9yppbz defect, which stems from the same issue but manifests differently cause inconclusive cause inconclusive cause inconclusive cause inconclusive cause inconclusive cause inconclusive cause inconclusive cause inconclusive cause inconclusive 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 process, material, and hardware checks if any of these conditions apply to your print, take the corrective action and reprint to see if the problem is resolved washing touchup touch up parts with additional cleaning to remove resin (shiny areas) use lint free wipes use swabs use compressed air cabinet touch up methods reference washing for more information washing solventless spinning adjust spin settings adjustments are listed in the recommended order to try increase spin speed +20% note there is a risk parts will peel off the platform or tear without adequate adhesion and lattice strength at higher spin speeds increase spin duration +33% note that solventless spinning is a production process for select l1 printed applications 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 design redesign part add a fillet or chamfer to tight corners tight corners ≤ 90° provide drainage for blind holes and difficult to access features increase spacing between fine features redesign if problems persist, please reach out to carbon support explanation & causes explanation when parts are not fully cleaned, liquid resin remains on the part after washing and cures into the part features prone to collecting liquid resin and not getting fully cleaned blind holessmall openings with only one access point tight corners (acute angles ≤ 90°) tightly packed features difficult to access spaces areas that solvent cannot access easily small features and openings such as in a lattice blind hole example this example shows a blind hole without drainage without drainage and with a drain hole with a drain hole the blind hole with a drain hole at the base of the feature allows resin to wash out of the feature with solvent with a swab, you can see that the blind hole retains liquid resin after washing while the drained hole comes out clean blind hole example causes post processing how the part is handled in post processing is causing the defect post processing root issue problem why defect presents washing blind holes solvent cannot effectively reach part features when the surface tension of the liquid resin is stronger than the solvent's ability to flow through the feature corners tight corners ≤ 90° tightly packed features difficult to access spaces small features and openings print preparation or part design how the part is oriented , supported , or designed is causing the defect root issue problem why defect presents design blind holes tight spaces create areas where the surface tension of the liquid resin is stronger than the solvent's ability to flow through during washing tight corners ≤ 90° tightly packed features difficult to access spaces small features and openings small features and openings