This is my fully automatic stone generator ( You have to harvest it yourself though ). It relies on a the moving lava + still water = Smooth stone technique.
It runs on a redstone clock with interchangeable speeds, can toggle on and off, and can be overridden.
The lava falls into an infinite water pool and turns on block into stone.
Then it is pulled down and pushed to the side by the pistons shown here:
As you know, pistons can only push 12 blocks. so when the line of stone reaches 12 blocks, a line of pistons push them into a sheet using this sensor:
There also is another sensor at the end of the 12X12X1 sheet that tells the clock to shut off automatically
using the same sensor shown previously.
This is my first creation so please don't judge too harshly, and also my first time editing pictures so sorry for the lousy job... have a nice day I don't know if it's been done before, but I just built this one from my thoughts, so i didn't plagiarize anything