fix(step-generation): only aspirate disposal volume in first chunk (#…

…17202) closes RQA-3807
Opentrons · Jan 8, 2025 · 9e0d3cb · 9e0d3cb
1 parent dc624b8
commit 9e0d3cb
Showing 1 changed file with 8 additions and 2 deletions.
diff --git a/step-generation/src/commandCreators/compound/distribute.ts b/step-generation/src/commandCreators/compound/distribute.ts
@@ -483,14 +483,20 @@ export const distribute: CommandCreator<DistributeArgs> = (
             }),
           ]
         : []
-
+      const aspirateDisposalVolumeOnce = chunkIndex === 0 ? disposalVolume : 0
       return [
         ...tipCommands,
         ...configureForVolumeCommand,
         ...mixBeforeAspirateCommands,
         curryCommandCreator(aspirate, {
           pipette,
-          volume: args.volume * destWellChunk.length + disposalVolume,
+          volume:
+            args.volume * destWellChunk.length +
+            //  only add disposal volume if its the 1st chunk and changing tip once
+            //  and not blowing out after dispenses
+            (args.changeTip === 'once' && blowoutLocation == null
+              ? aspirateDisposalVolumeOnce
+              : disposalVolume),
           labware: args.sourceLabware,
           well: args.sourceWell,
           flowRate: aspirateFlowRateUlSec,