diff --git a/sdk b/sdk
index c13f0f7..9f2fd2e 160000
--- a/sdk
+++ b/sdk
@@ -1 +1 @@
-Subproject commit c13f0f786605b749458956e3b77c66b065315c7a
+Subproject commit 9f2fd2e2c684b6a7c09bfa5c6f5ae38a44e21d1b
diff --git a/usrc/main.cpp b/usrc/main.cpp
index 35f6880..ac14131 100644
--- a/usrc/main.cpp
+++ b/usrc/main.cpp
@@ -94,8 +94,8 @@ void umain() {
     ZLOGI(TAG, "motora initialize 5160:%x ", g_motor.readICVersion());
   }
 
-  g_motor.setAcceleration(300000);
-  g_motor.setDeceleration(300000);
+  g_motor.setAcceleration(100);
+  g_motor.setDeceleration(100);
   g_motor.setIHOLD_IRUN(0, 8, 10);
 
   g_motor.rotate(0);