Side to Side Migration Method for Worm Compost Harvesting– Wait until all your bedding has been processed into vermicompost. Then, pull it all to one side of your worm compost bin leaving the other side open. Fill the open side with fresh worm bin bedding and begin feeding your worms only on that side. Over the course of a couple weeks most of your worms will take the hint and move to the new side and you can pull finished worm compost from the other.
For more ways to harvest worm compost read: How to Harvest Worm Compost: Learn 7 different methods for Harvesting your nutrient-rich worm poop!