diff --git a/src/main/java/com/iflytop/handacid/app/service/ChannelCtrlService.java b/src/main/java/com/iflytop/handacid/app/service/ChannelCtrlService.java
index 6e0a5b3..72fa17d 100644
--- a/src/main/java/com/iflytop/handacid/app/service/ChannelCtrlService.java
+++ b/src/main/java/com/iflytop/handacid/app/service/ChannelCtrlService.java
@@ -339,9 +339,9 @@ public class ChannelCtrlService {
             throw new IllegalArgumentException("Formulation 或其字段 volume/revolutions 不能为空");
         }
         Integer pumpConversionFactor = systemConfigService.getValueByKeyToInteger(SystemConfigKey.PUMP_CONVERSION_FACTOR);
-        double deltaRevolutions = afterPosition - beforePosition;
-        double targetVolume = formulation.getVolume() / pumpConversionFactor;
-        double targetRevs = formulation.getRevolutions() / pumpConversionFactor;
+        double deltaRevolutions = (afterPosition - beforePosition) / pumpConversionFactor;
+        double targetVolume = formulation.getVolume();
+        double targetRevs = formulation.getRevolutions();
         if (targetRevs == 0) {
             throw new IllegalArgumentException("Formulation.revolutions 不能为 0");
         }