When does child support money go through

So i file yesterday and want to know when i will get money? I have 2 little ones. One is 2 and the other is 1. Their dad left us didnt want nothing to do with us . I hope they take money outta his check .. or idk how does it work for me to get paid. . When will i get paid. I do have a job yes but not a great one im making ends meat and he makes more than me and doesnt give me a dime. Sadly.. im heartbroken about all this but i gotta move on and get whats right …. Does he have to sign papers too and corporate? Because i dont think he will give me anything… but i hope they will make him take it out