How does wood pellet machine makes pellets
  First,the raw suppliers need to be totaly dry prior to you put them in machine,and it need some moisture to support with them binding solidly together,you should be noted here that becoming wet and having moisture are two various issues,so don't be confused,in addition,keep in mind that some wood have some wood have sufficient lignin in them that you don't require a binder anymore,but some don't.so you will need to add something for them to bind together.