The Auto Sieve will automatically sift blocks in its inventory as long as it's provided with a mesh and some energy.
It can be powered using any Forge Energy compatible mod.
To speed up an Auto Sieve, one can feed the tiny person inside to make them work faster. Any food will work; the tastier the food, the more it motivates your sifter to work faster.
Additionally, the mesh used inside the sieve can be enchanted with either Unbreaking, Fortune or Efficiency.