The initial set up should be about 30 feet. Once you use the machine you may find that you may want change this distance, depending on your needs. If the machine is pitch too fast for you, move a little further away from the machine. If you want to have a faster reaction time, move closer to the machine. Let us know if there are other distances you would like to see our engineers put together charts for, contact us here: https://contact.maxbp.com/