diff --git a/controls-constructor/src/commonMain/kotlin/space/kscience/controls/constructor/Drive.kt b/controls-constructor/src/commonMain/kotlin/space/kscience/controls/constructor/Drive.kt
index 9366971..0cf4ce0 100644
--- a/controls-constructor/src/commonMain/kotlin/space/kscience/controls/constructor/Drive.kt
+++ b/controls-constructor/src/commonMain/kotlin/space/kscience/controls/constructor/Drive.kt
@@ -49,7 +49,7 @@ public class VirtualDrive(
     public val positionState: MutableDeviceState<Double>,
 ) : Drive, DeviceBySpec<Drive>(Drive, context) {
 
-    private val dt = meta["time.step"].double?.milliseconds ?: 5.milliseconds
+    private val dt = meta["time.step"].double?.milliseconds ?: 1.milliseconds
     private val clock = context.clock
 
     override var force: Double = 0.0
@@ -74,7 +74,6 @@ public class VirtualDrive(
 
                 // compute new value based on velocity and acceleration from the previous step
                 positionState.value += velocity * dtSeconds + force / mass * dtSeconds.pow(2) / 2
-                propertyChanged(Drive.position, positionState.value)
 
                 // compute new velocity based on acceleration on the previous step
                 velocity += force / mass * dtSeconds
diff --git a/controls-constructor/src/commonMain/kotlin/space/kscience/controls/constructor/PidRegulator.kt b/controls-constructor/src/commonMain/kotlin/space/kscience/controls/constructor/PidRegulator.kt
index 9fc6e18..860af60 100644
--- a/controls-constructor/src/commonMain/kotlin/space/kscience/controls/constructor/PidRegulator.kt
+++ b/controls-constructor/src/commonMain/kotlin/space/kscience/controls/constructor/PidRegulator.kt
@@ -62,7 +62,6 @@ public class PidRegulator(
                     lastPosition = drive.position
 
                     drive.force = pidParameters.kp * delta + pidParameters.ki * integral + pidParameters.kd * derivative
-                    propertyChanged(Regulator.position, drive.position)
                 }
             }
         }