Over-Adhesion

over adhesion the part is difficult to remove from the platform how to identify over adhesion is really an experience while removing the part from the platform, rather than a defect itself other defects may arise as a result of the difficulty in platform removal, as shown in the examples below, or you may simply be adding time to production as the labor to remove these parts becomes a burden over adhesion can be experienced as follows parts are very difficult to remove from the platform parts exhibit flashing docid 24acfq6oley813qgv8hfw where they attach to the platform parts exhibit chipping docid 03vzh0j7nc3bi1cbps8mm or gouging docid\ lwfemtubtirws ij caio where they meet the platform when attempting to remove flashing example with parts on the platform chipping example during platform removal troubleshooting do you see a defect? if you see flashing docid 24acfq6oley813qgv8hfw , chipping docid 03vzh0j7nc3bi1cbps8mm , or gouging docid\ lwfemtubtirws ij caio , refer to that defect's troubleshooting for specific guidelines is the part difficult to remove without a defect? 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 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 platform for new platforms the factory coating may make parts difficult to remove use acetone wipes or an acetone soaked blue towel to scrub off the coating for platforms that have been in production, refer to the diagnostics section platform release film release film reduces adhesion if you experience over adhesion, try printing the build using release film release film process technique try removing parts from the platform with a dead blow hammer and scraper, when too much force is needed with the scraper tool alone align the scraper blade with the part tap back of the scraper tool lightly with the hammer make sure to keep blade against platform at all times dead blow hammer diagnostics if the above checks & actions did not resolve the issue or do not apply to your print, the following diagnostics may further inform what is causing the issue hardware print with a different platform if the issue is resolved with another platform, reach out to carbon support for assistance with the problematic hardware if the issue persists with the same platform, run an printer health checks 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 change the orientation to place a smaller cross section on the platform orientation supports support the part off the platform supports will provide a smaller cross section on the platform the scraper tool used to remove the part from the platform will not touch the part, protecting it from damage supports design redesign the part with fillets or bevels at the platform edges design use extreme caution with this troubleshooting option use extreme caution with this troubleshooting option a common cause for the inverse defect, under adhesion docid\ dabqnxb4kng1eeiclrzqf , can be from this type of design this is best utilized for rigid resins when the cross section on the platform is large and other solutions are not viable print plan adjustments reference print plan adjustments for guidance on the following parameters 5 exposure parameters to reduce adhesion exposure timing parameters base exposure multiplier brightlining parameters all four parameters must be specified brightline interior exposure time brightline exterior exposure time brightline border thickness pixels brightline outer borders if problems persist, please reach out to carbon support mailto\ support\@carbon3d com explanation & causes explanation the first slices of the build are exposed to a higher level of uv light to promote adhesion this can result in parts that are very strongly adhered to the platform geometries with larger cross sections at the platform are the most susceptible to over adhesion epx may be more prone to over adhesion due to its rigidity over adhesion 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 large cross section on the platform more surface area to adhere the part to the platform at the higher base exposure levels hardware the printer, cassette, or platform is dirty or requires maintenance to resolve the defect occasionally, a defect may indicate the printer requires servicing by a carbon engineer root issue problem why defect presents cleaning factory coating on platform the factory coating on a new platform can lead to stronger adhesion misalignment mechanical alignment of the printer the platform could be too close to the window, receiving a higher dose of uv light than intended 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 5 exposure exposure timing increase increase adhesion is increased with more uv exposure 5 exposure brightlining increase increase adhesion is increased with more uv exposure