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 72fa17d..bdcdb61 100644
--- a/src/main/java/com/iflytop/handacid/app/service/ChannelCtrlService.java
+++ b/src/main/java/com/iflytop/handacid/app/service/ChannelCtrlService.java
@@ -339,7 +339,7 @@ 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) / pumpConversionFactor;
+        int deltaRevolutions = (int) (((afterPosition - beforePosition) / pumpConversionFactor));
         double targetVolume = formulation.getVolume();
         double targetRevs = formulation.getRevolutions();
         if (targetRevs == 0) {