Carving on a round piece of stock

I have a round piece of stock pine I want to place in my x carve and engrave a logo on but I am having trouble trying to figure out how to set it up to not start carving in the bottom left corner as would be no problem on a square piece, any help would be greatly appreciated, I already have everything created but I am scared its not going to start where I need it to start carving.
The circle is a 17.5 round, so i set my dementions on my work piece at 17.5 X 17.5

Work zero and machine zero are two different things. You can set the work zero wherever you want it. I have numerous videos showing this


Thanks so much, as I was waiting on a reply from someone I actually ran across this video and it showed me all that I needed to know, iv watched a few of your videos, bunches and bunches of help. Thanks a lot