diff --git a/src/main/java/com/iflytop/gd/hardware/type/LiquidDistributionArmDriver.java b/src/main/java/com/iflytop/gd/hardware/type/LiquidDistributionArmDriver.java
index c54d2b8..582c830 100644
--- a/src/main/java/com/iflytop/gd/hardware/type/LiquidDistributionArmDriver.java
+++ b/src/main/java/com/iflytop/gd/hardware/type/LiquidDistributionArmDriver.java
@@ -9,22 +9,38 @@ import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.stereotype.Component;
 
+/**
+ * 加液臂接口
+ */
 @Component
 @Slf4j
 @RequiredArgsConstructor
 public class LiquidDistributionArmDriver {
     final private A8kCanBusService canBus;
 
+    /**
+     * 使能
+     * @param id
+     * @param enable
+     * @throws HardwareException
+     */
     public void liquidDistributionArmEnable(LiquidArmMId id, int enable) throws HardwareException {
         log.info("liquidDistributionArmEnable called with id: {}, enable: {}", id, enable);
         canBus.callcmd(id.mid, CmdId.liquid_distribution_arm_enable, enable);
     }
 
+    /**
+     * 移动到指定试管架
+     * @param id
+     * @param index
+     * @throws HardwareException
+     */
     public void liquidDistributionArmMoveTo(LiquidArmMId id, int index) throws HardwareException {
         log.info("liquidDistributionArmMoveTo called with id: {}, index: {}", id, index);
         canBus.callcmd(id.mid, CmdId.liquid_distribution_arm_move_to, index);
     }
 
+
     public int liquidDistributionReadPos(LiquidArmMId id) throws HardwareException {
         log.info("liquidDistributionReadPos called with id: {}", id);
         var packet = canBus.callcmd(id.mid, CmdId.liquid_distribution_arm_read_pos);
@@ -41,6 +57,11 @@ public class LiquidDistributionArmDriver {
         canBus.callcmd(id.mid, CmdId.liquid_distribution_arm_set_cur_pos_as_mid_pos);
     }
 
+    /**
+     * 停止
+     * @param id
+     * @throws HardwareException
+     */
     public void moduleStop(LiquidArmMId id) throws HardwareException {
         log.info("moduleStop called with id: {}", id);
         canBus.moduleStop(id.mid);