Fixed head differential

talos_description/urdf/head/head.urdf.xacro

@@ -151,8 +151,8 @@
       <origin xyz="0 0 0" rpy="${-90 * deg_to_rad} 0 ${-90 * deg_to_rad}"/>
     </xacro:xtion_pro_live>
     <xacro:talos_head_differential_transmission name="${name}" number1="1" number2="2"
-                                                act_reduction1="1.0" act_reduction2="1.0"
-                                                jnt_reduction1="1.0" jnt_reduction2="1.0" />
+                                                act_reduction1="1.0" act_reduction2="-1.0"
+                                                jnt_reduction1="1.0" jnt_reduction2="2.0" />
   </xacro:macro>
 
 </robot>