Scale

all manufacturing processes have some degree of tolerance and constraints at play the dls™ process is no different as it deals with the dynamics of printing one such dynamic that affects the accuracy of parts is dls printer dynamics the printer software automatically compensates for shrinkage with scale factors to suit the majority of parts the user can both view and adjust scale factors if needed to dial in tolerance with the software's scaling features this lesson will show you what tools you have available inside the printer ui to scale your part as needed scale vs correction scale the printer software provides two mechanisms for scaling your parts each serves a different purpose and behaves slightly differently scale correction scale primary use large scale changes fine tuning scale changes default scale 1 1 no automatic scaling pre applied scale factor per resin and geometry amount of scaling unlimited 0 7 1 2 axes of scaling imported model axes current orientation axes effect of scaling regenerates supports and clears part labels leaves supports and part labels intact only applicable resins make adjustments per geometry while supports and part labels remain when adjusting correction scale, users should inspect your build and parts carefully to ensure you have achieved the desired results scale scale correction scale correction scale how correction scale is applied how correction scale is applied resin must be selected to apply the correction scale resin must be selected to apply the correction scale select resin note the changes to correction scale select resin note the changes to correction scale geometry dependent resins will adjust the correction scale when the model scale is changed geometry dependent resins all resins receive a correction scale factor to account for shrinkage due to cooling and solidification some resins are also susceptible to shrinkage due to mass loss , which occurs during the thermal curing (baking) step that 2 part resins use during post processing within this category of 2 part resins, some materials are particularly susceptible to the effects of mass loss these are the resins that receive a correction scale factor based on the average wall thickness of the part geometry 2 part resins not listed below are minimally affected by mass loss and receive a scale factor that does not change based on geometry epu 41 black epu 43 epu 45 damping epu 46 black (& soft, extra soft) epu 46 coloration (& soft, extra soft) epx 82 epx 86fr epx 150 fpu 50 rpu 70 rpu 130 sil 30 note that compensation for mass loss is based on average wall thickness parts with variable wall thicknesses will see some variation in accuracy across the geometry stl model notes part list parts are scaled individually with correction scale if you use non carbon software to prepare a full build and import that as a single stl, carbon will interpret your build as a single part rather than as multiple separate parts correction scale will therefore apply to the whole build rather than to individual parts, potentially affecting accuracy if you are unsure whether carbon is interpreting an uploaded file as one part or many parts, check the part list on the left hand side of the ui to see if there is one or many parts listed downloaded parts will be at their original model scale the mechanism for applying corrective scaling changed between software releases v1 38 and v1 39 please read below for more information software v1 38 to v1 39 scale factors applied automatically to your prints may be different between ≤ v1 38 and ≥ v1 39 the degree of difference will depend on the resin you are using and the part geometry, with thin walled parts seeing the greatest difference, improving accuracy in ≥ v1 39 for applicable resins ≤ v1 38 ≥ v1 39 scaling mechanism by slice per part / stl model scaling applies equally to all parts within the build to each individual stl scale factor per resin per resin and geometry accounting for mass loss scale factor assumes 7 5 mm average wall thickness for all resins, except rpu 130 which assumes 2 mm wall thickness adjusts scale factor based on the part's average wall thickness slice count may vary between projects on ≤ v1 38 and ≥ v1 39 only applicable resins make adjustments per geometry scale factors for accuracy ≤ v1 38 accounting for mass loss in ≤ v1 38 required users to manually apply an additional scale factor per resin for their part's average wall thickness for ≥ v1 39, the table below is a conversion of the old scale factors if users wish to match previous recommendations rather than use v1 39's automatic geometry based scale factors note that this will provide a close approximation, but the scale factor will be applied to the part rather than per slice (as was the method in ≤ v1 38), so results may contain slight variation if you wish to preserve an old project exactly as is, see backwards compatibility below wall thickness (mm) epu 40 epu 41 epx 82 fpu 50 mpu 100 rpu 70 rpu 130 sil 30 xy z xy z xy z xy z xy z xy z xy z xy z 0 5 1 020 1 027 1 025 1 030 1 035 1 028 1 040 1 029 1 034 1 003 1 040 1 035 1 057 1 052 1 059 1 060 1 0 1 017 1 024 1 022 1 027 1 025 1 018 1 020 1 009 1 010 1 001 1 015 1 010 1 042 1 037 1 039 1 041 2 5 1 014 1 022 1 020 1 025 1 014 1 007 1 015 1 004 1 009 1 000 1 005 1 005 1 020 1 015 1 023 1 025 7 5 1 004 1 012 1 010 1 015 1 010 1 003 1 015 1 004 1 009 1 000 1 009 1 009 1 009 1 004 1 011 1 012 backwards compatibility all projects created in ≤ v1 38 or prior will remain in their previously scaled state until actively upgraded by the user legacy projects will be flagged with a yellow warning dot on the scale tab when opened in ≥ v1 39 legacy projects created prior to v1 39 to retain old scaling recommended for projects with validated accuracy do nothing to upgrade scaling recommended for projects in development duplicate project to retain a copy of old scaling conditions click correct project scale button ctrl z (cmd z) will undo the upgrade immediately after if done by mistake this is a temporary undo condition the upgrade cannot be reverted going forward the upgrade cannot be reverted going forward to upgrade scaling upgraded projects may yield parts slightly larger or smaller than they were previously the part volume may be different (the printed part may use slightly more or less resin than it did prior to this new part scaling approach) print time may be different (the project may print slightly faster or slower than it did before due to changes in the part dimensions being printed) parts that are located close to the edge of the platform area may no longer fit on the platform as laid out (eg, if the newly scaled part is slightly larger); you may need to adjust the layout of your build projects created on ≥ v1 39 and then opened or queued to a ≤ v1 38 printer will not receive the newer correction scale factors projects will be scaled per the software version on that printer be careful to keep all printers in your fleet updated to the latest software be careful to keep all printers in your fleet updated to the latest software