It switches between recipies every 2 minutes (can be changed, 60 =1 second), recipies with more items requested have priority. To setup: 1- Connect the green wire from the substation [item=substation]to your storage area [item=storage-chest], and make sure each chest is connected to it. 2- Connect the pumps with [fluid=water]and [fluid=lubricant]. 3- Select the items and quantity you want in the constant combinator [item=constant-combinator]. 4- Make sure [item=roboport] is in reach.