Jesusfreak101
Herd Master
The one i use system is based of vacuum. The pump sucks out all the air and once the milk starts flowing really well you can turn it off and the milk should keep flowing for a good while then it will stop when if the cup comes off because she kicks it or if she is all most out and you hit the button again. And also you need to make sure to hit her udder every once in awhile.