Broken Struts

broken struts part feature prints properly and breaks at a later point how to identify broken struts can be diagnosed as follows areas of breakage will fit together like puzzle pieces features will not be missing printed material when the broken area is held back together occurs on elastomeric lattices puzzle pieces broken struts docid\ daen8lgs6gp8auw ue5ls and tears docid\ ojz 12lsnz1 5bo4gyw06 are defects that arise from the same issue but one appears on lattices and the other on surfaces, respectively rigid parts experience gouging instead of broken struts or tears causes printing forces printing forces solution print preparation or part design cause inconclusive troubleshooting try the following actions in order process checks print preparation or part design adjustments it is recommended that you review all the possible solutions before taking action to ensure you are pursuing the best course of action process checks most broken struts occur during post processing review the scenarios below and verify if any apply to operating procedures aggressive part removal follow recommended procedures for washing and proceed gently with elastomeric resins which are delicate in their green state part removal lattices washed on platform thin strut lattices washed on the platform may tear during washing as parts swell temporarily from solvent wash these lattices off the platform using a part washer basket manually with spinning does not apply to solvent less washing techniques with l1 platforms lattices washed on platform print preparation or part design adjustments it is less common for broken struts or tears to occur during printing but can occasionally happen due to print forces 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 add struts to provide more structure at the problematic struts the performance of the lattice will change add struts print plan adjustments reference print plan adjustments docid\ nxuk0dltz vemeau0dipn for guidance on the following parameters 1 pump up parameters docid\ xp2lrjpj4njfl z8n58rl pump height parameters minimum pump height distance from peak multiplier minimum distance from peak platform speed parameters motor speed up if problems persist, please reach out to carbon support explanation & causes explanation broken struts can occur in elastomeric lattices when they are stretched and pulled to the point of breakage this can occur during post processing or printing, with the former being the common scenario causes post processing how the part is handled in post processing is causing the defect post processing lattice root issue problem why defect presents platform removal aggressive elastomeric resins are delicate in the green state and require gentle handling lattices washed on platform swelling solvent is temporarily absorbed into parts which causes swelling thin struts can be stretched and torn by swelling when the platform constraints the lattice on on side 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 design weak struts thin struts that are supporting larger struts or cross sections can tear under suction forces 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 increase increase a large pump height can stretch and break struts that are still clinging to the dead zone's surface tension platform speed increase increase increased motor up speed increases suction forces which can be especially problematic if a large cross section occurs later in the print after delicate struts