diff --git a/src/main/java/com/iflytop/gd/hardware/utils/Math/StepMotorConverter.java b/src/main/java/com/iflytop/gd/hardware/utils/Math/StepMotorConverter.java
index a52184f..53d4f62 100644
--- a/src/main/java/com/iflytop/gd/hardware/utils/Math/StepMotorConverter.java
+++ b/src/main/java/com/iflytop/gd/hardware/utils/Math/StepMotorConverter.java
@@ -65,7 +65,7 @@ public class StepMotorConverter {
      */
     public static int toMotorSpeed(double speed, double S)
     {
-        return (int)(speed * 60.0 / S);
+        return (int)speed;
     }
 
     /**
@@ -76,6 +76,6 @@ public class StepMotorConverter {
      */
     public static double toUserSpeed(int motorSpeed, double S)
     {
-        return (double)motorSpeed * S / 60.0;
+        return (double) motorSpeed;
     }
 }