There are. For example, there are the ones on the religious kibbutz in Bet She'an, Israel. The cows are milked by a machine set with a timer, and it may not be drunk until after the Sabbath.
You should know that this isn't the best time to ask questions directed at English-speaking Orthodox Jews, as the Sabbath hasn't ended yet in North America, and it's the middle of the night in England and Israel.
edit: Re: "If the cows are hooked up to milking machines that are are timers wouldn't mean they would have to stand in one spot for more than 24 hours? that would have to be hard on the cows."
The cows do not stand hooked up to the milking machines the entire day. At kibbutz Sde Eliyahu, "the cows are hooked up to the machine with electricity off, and the electricity is soon turned on automatically to milk the cows."
Another religious kibbutz mentions a completely automated milking parlour, requiring no human intervention.
(Someone who identifies himself as "a member of a religious kibbutz in Israel and having worked with cows for over five years before giving it up" describes it as follows:
"In a nutshell the milking parlour starts milking at a specific time with a time switch and uses pneumatic switches, automatic milk sensors,compressed air to open and close doors and gates [...] the milk is automatically transferred to the refrigeration tank.The cow itself wears an electronic foot band that as soon as the cow enters the parlour she is recognized by the computer farm control management system. The amount of milk she gives is measured automatically it's conductivity and a number of other factors as well.")
(The reason that this would be permitted on the Sabbath is that certain types of "indirect work" are allowed in a case of great need, such as that of preventing pain to animals, or a possible situation of "great loss" as specified in the law.
And a kibbutz is a kind of communal farm.)