diff --git a/Core/Inc/machine.h b/Core/Inc/machine.h
index a768400..7c9c3fd 100644
--- a/Core/Inc/machine.h
+++ b/Core/Inc/machine.h
@@ -30,8 +30,8 @@ extern "C" {
   */
 typedef enum
 {
-  MOTOR_DIR_CWW = 0,  /* 向左移动 (Counter Clockwise) */
-  MOTOR_DIR_CW  = 1   /* 向右移动 (Clockwise) */
+  MOTOR_DIR_CW  = 0,  /* 向左移动 (Clockwise) */
+  MOTOR_DIR_CCW = 1   /* 向右移动 (Counter Clockwise) */
 } Motor_DirectionTypeDef;
 
 /* Exported constants --------------------------------------------------------*/
@@ -73,7 +73,7 @@ uint8_t Machine_IsAtLimit(void);
 
 /**
   * @brief  设置步进电机方向
-  * @param  dir: 方向 (MOTOR_DIR_CWW: 向左, MOTOR_DIR_CW: 向右)
+  * @param  dir: 方向 (MOTOR_DIR_CW: 向左, MOTOR_DIR_CCW: 向右)
   * @retval None
   */
 void Machine_SetDirection(Motor_DirectionTypeDef dir);
diff --git a/Core/Src/machine.c b/Core/Src/machine.c
index 71bde7d..c7d462a 100644
--- a/Core/Src/machine.c
+++ b/Core/Src/machine.c
@@ -164,8 +164,8 @@ uint8_t Machine_IsAtLimit(void)
 /**
   * @brief  设置步进电机方向
   * @param  dir: 方向
-  *         MOTOR_DIR_CWW (0): 向左移动 (CWW - Counter Clockwise)
-  *         MOTOR_DIR_CW  (1): 向右移动 (CW - Clockwise)
+  *         MOTOR_DIR_CW  (0): 向左移动 (CW - Clockwise)
+  *         MOTOR_DIR_CCW (1): 向右移动 (CCW - Counter Clockwise)
   * @note   PD7为0表示向左，1表示向右
   * @retval None
   */
@@ -174,7 +174,8 @@ void Machine_SetDirection(Motor_DirectionTypeDef dir)
   GPIO_PinState pinState;
   
   /* 根据方向设置PD7引脚状态 */
-  pinState = (dir == MOTOR_DIR_CWW) ? GPIO_PIN_RESET : GPIO_PIN_SET;
+  /* CW(0) = 向左 = GPIO_PIN_RESET, CCW(1) = 向右 = GPIO_PIN_SET */
+  pinState = (dir == MOTOR_DIR_CW) ? GPIO_PIN_RESET : GPIO_PIN_SET;
   
   /* 设置方向引脚 */
   HAL_GPIO_WritePin(MOTOR_DIR_PIN_PORT, MOTOR_DIR_PIN, pinState);
@@ -212,8 +213,8 @@ uint8_t Machine_MoveToOrigin(void)
 {
   uint32_t stepCount = 0;
   
-  /* 设置方向为向左（CWW） */
-  Machine_SetDirection(MOTOR_DIR_CWW);
+  /* 设置方向为向左（CW） */
+  Machine_SetDirection(MOTOR_DIR_CW);
   DelayUs(STEP_DELAY_US);
   
   /* 如果已经在原点，直接返回 */
@@ -276,7 +277,7 @@ uint8_t Machine_MoveToMaterial1(void)
   steps = Machine_MmToSteps(DISTANCE_TO_MATERIAL1);
   
   /* 向左移动 */
-  return Machine_MoveSteps(MOTOR_DIR_CWW, steps);
+  return Machine_MoveSteps(MOTOR_DIR_CW, steps);
 }
 
 /**
@@ -292,7 +293,7 @@ uint8_t Machine_MoveToMaterial2(void)
   steps = Machine_MmToSteps(DISTANCE_TO_MATERIAL2);
   
   /* 向左移动 */
-  return Machine_MoveSteps(MOTOR_DIR_CWW, steps);
+  return Machine_MoveSteps(MOTOR_DIR_CW, steps);
 }
 
 /**
@@ -308,7 +309,7 @@ uint8_t Machine_MoveToMaterial3(void)
   steps = Machine_MmToSteps(DISTANCE_TO_MATERIAL3);
   
   /* 向右移动 */
-  return Machine_MoveSteps(MOTOR_DIR_CW, steps);
+  return Machine_MoveSteps(MOTOR_DIR_CCW, steps);
 }
 
 /**
@@ -324,7 +325,7 @@ uint8_t Machine_MoveToMaterial4(void)
   steps = Machine_MmToSteps(DISTANCE_TO_MATERIAL4);
   
   /* 向右移动 */
-  return Machine_MoveSteps(MOTOR_DIR_CW, steps);
+  return Machine_MoveSteps(MOTOR_DIR_CCW, steps);
 }
 
 /* USER CODE BEGIN 1 */