If your goal is to get equity of any significant amount, you should discuss this up front - that's not to say ask for it right away, but talk about the path for

If your goal is to get equity of any significant amount, you should discuss this up front - that's not to say ask for it right away, but talk about the path for that job and whether if things go well in X months or years you will get 1% or whatever it is you want. You could also ask how much runway they have.