diff --git a/usrc/main.cpp b/usrc/main.cpp
index 857c9a5..ee647ce 100644
--- a/usrc/main.cpp
+++ b/usrc/main.cpp
@@ -71,10 +71,10 @@ void Main::run() {
     ZLOGI(TAG, "motorb:TMC4361Version:%lx  TMC2160VERSION:%lx", ic4361Version, ic2160Version);
   }
 
-  motora.setIHOLD_IRUN(1, 28, 0);  // 小臂
+  motora.setIHOLD_IRUN(1, 12, 0);  // 小臂
   motora.setMotorShaft(0);
 
-  motorb.setIHOLD_IRUN(1, 28, 0);  // 小臂
+  motorb.setIHOLD_IRUN(1, 12, 0);  // 小臂
   motorb.setMotorShaft(0);
 
   motora.rotate(1200000);