Resin Starvation

resin starvation resin runs out during a print or is locally starved due to part geometry how to identify resin starvation can be diagnosed as follows window is not fully covered with resin at print’s end part feature(s) are missing or did not fully resolve voids docid\ egeupfgjx2giihhazd6 0 is a defect that can appear similar as it arises from similar circumstances cause unvented volume unvented volume solution print preparation or part design cause part geometry part geometry solution print preparation or part design cause inconclusive cause inconclusive cause inconclusive cause resin amount resin amount solution resin check 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 resin always dispense the required resin volume displayed in project analysis tab reference project analysis docid\ gfr goc irq l9 kanc x in the printer ui training this is the minimum amount of resin to dispense for multiple prints, add the part and support volume for each additional print check the resin in the cassette between prints to make sure resin fully covers the window to verify there is enough resin for another build according to the required resin volume required resin volume 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 verify if the printer is level place a digital or bubble level on the printer deck, where the cassette interfaces with the printer orient the level in multiple directions to verify level on the printer deck pour a small amount of resin in the cassette and install the cassette in the printer let the resin settle in place and inspect the resin to see if it flowed to one side or area of the cassette run an printer health checks if the printer is not level setup follow procedure to level your printer all other printers ( m1, m2, l1) contact carbon support to have your printer leveled by a carbon field service engineer do not attempt to self level these printers do not attempt to self level these printers 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 part geometry reorient parts such that features which hold resin during printing are positioned to allow resin to drain and flow during printing unvented volume reorient the part to vent the trapped volume supports may be needed with a new orientation orientation supports unvented volume lift the part above the platform on supports to vent the trapped volume if supporting with fences around the perimeter, you may need to break the fence up into two or three lengths with 2mm gaps in between to provide adequate venting supports design part geometry add drain holes in the part unvented volume add vent holes in the part, at or near the platform, to vent the trapped volume reference dls design guidelines for drain/vent hole guidelines design print profile print using the default print profile instead of dynamic to slow down the print reference print controls dynamic is primarily a tool for m1 and m2 printers force feedback (ffb) printers (m3, m3 max, l1) will see minimal to no difference in print speed with the dynamic print profile, so this troubleshooting option is unlikely to help default print profile print plan adjustments reference print plan adjustments for guidance on the following parameters 1 pump up parameters pump height parameters minimum pump height distance from peak multiplier minimum distance from peak 2 settle up parameters delay timing parameters force slope up settled threshold minimum time force slope up settled if problems persist, please reach out to carbon support explanation & causes explanation resin starvation can occur during a print if not enough resin was dispensed the printer is not level, most noticeable with an l1 printer features in the geometry prevent a large volume of resin from draining, such as unvented volumes this can also lead to localized areas of starvation from restricted resin flow, as opposed to a lack of enough resin in the cassette not enough resin was dispensed 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 part geometry resin is not draining from part features certain geometries, such as manifolds, can trap resin during printing if the part is not oriented or designed to drain the resin part geometry straw effect holes in the part geometry can pull in resin during the pump up stage from suction forces unvented volume resin trapped in unvented volume resin cannot drain from an unvented volume because the pressure differential holds the resin inside the enclosed volume 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 leveling resin level is too low in one area of cassette if the printer is not level, the resin may not cover the window if it's pooling on one side or area of the cassette resin the printing material is expired , beyond the printing range in its pot life , or has been improperly mixed , causing abnormalities in the print resin root issue problem why defect presents dispensing not enough resin was dispensed the recommended resin volume is meant to cover the window fully during printing in addition to providing the material for the part & support volume 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 1 pump up pump height decrease decrease a decrease in the pump height can limit how much resin can flow out of part geometries that hold resin 2 settle up delay timing decrease decrease a shortened settle up stage limits the amount of time resin can flow out of part geometries that hold resin