Filled Holes on Skin

filled holes on skin feature holes in a skin are filled in with cured resin during printing how to identify skins are the name for a thin, solid covering over a lattice holes are sometimes designed into the skin as a design feature and/or for drainage of resin filled holes on skin can be diagnosed as follows holes appear as dimples rather than openings how to differentiate from similar appearing defects overcure docid\ x2fadtb4j lqyuerv3dgh may appear similar for small holes the difference will be that overcure will occur equally in all holes printed in the xy plane in most cases, whereas filled holes on skin may only occur in some holes in the xy plane, particularly holes near the center of the part excess resin docid\ yrpf8m5stjm3dfce wwkx may appear similar for small holes the difference will be that excess resin in the holes will have a shinier surface finish than the skin around it, due to curing after printing rather than during cause poor resin flow poor resin flow 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 reorient the part so the skin and holes are oriented vertically instead of in the xy plane orientation design increase hole diameter by 25% design print plan adjustments reference print plan adjustments for guidance on the following parameters 4 settle down parameters delay timing parameters minimum pre exposure delay minimum time force slope down settled if problems persist, please reach out to carbon support explanation & causes explanation during the settle down phase of printing a slice, resin is flowing out from under the part resin is flowing out from under the part at the same time, oxygen is recharging after printing the previous slice as the oxygen recharges, you can picture this as the slice image getting increasingly less blurry at full charge, the contrast in the slice image is at its full clarity the filled holes on skin defect occurs when the settle down phase is moving too quickly for the resin flow and oxygen recharge to have reached its optimal printing condition before curing the slice curing the slice reference dls printer dynamics docid\ u7xyytjydp3bvsyy2qkcu for more information on the phases of printing a slice filled holes on skin refer to the animations below to see a magnified view of how this hole appears during the settle down phase under both bad bad and good good conditions bad condition defect occurs defect occurs when the settle down phase is too fast for proper resin flow resin flow and to recharge the oxygen for full clarity in the slice before curing curing good condition the hole prints as expected hole prints as expected when the settle down phase is long enough for proper resin flow resin flow and oxygen recharge to reach full clarity in the slice upon curing curing 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 oriented the skin and holes are oriented in the xy plane during printing the settle down phase needs to be longer for the resin to flow properly across a large cross section parallel to the window designed the holes are too small if the settle down phase needs to be made too long for an efficient production printing time, the holes can be designed larger to compensate print plan adjustments print plan adjustments print plan adjustments adjust the print plan to optimize mid to high volume production and/or address part defects in doing so, adjustment may both prevent or cause defects below are adjustments that can cause this defect printing stage parameter type type of adjustment why defect presents 4 settle down delay timing decrease decrease the settle down phase is too fast for proper resin flow and oxygen recharge