I seem to have solved this by changing the channel on the wifi router. Sorry to trouble you!!
I have a Powerbook Mac running Yosemite. I'm trying to print using an Epson Expression Premium XP-720 printer. I can see on the monitor that the Mac is connected to the printer, however the printing either takes a huge amount of time before it starts printing or it times out having printed only a small amount. Earlier today it seemed to print fine. I have tried to find upgrades for the printer drivers but without success. I did however go to the App store and look for upgrades but it appears that my Mac is up to date