Just so everyone knows, it's not my design. It was on my mill when I got it. It does seem simple and straightforward. Also, can't it be moved to wherever a person wants the feed to stop.I haven't followed this closely but my take on the thing is that it's an emergency shut-down in case you drop dead during a cutting pass. Otherwise, who is going to wait all that time for the table to run all the way to the end when it finished the cut several minutes earlier.