Posters in A0, A1, A2 (and the Over-sized A0, A1, A2) formats can be printed using the a0 printer queue which is available on request. Please, send the poster to the printer queue and then ask the System Administrator to send it over to the printer.
The A0 printer is an HP 1055 Plotter, it is managed by DIT of EPFL and it is physically located at the central computing center (in front of the post office). You can fetch your poster at the Help Desk (room MA B 0466). The Help desk is not always open (see the section DIT Time Table from the Information menu of the Dit Page for opening hours). Therefore, do not wait until the last minute before printing.
Therefore, Don't even try to print a poster just one hour before the start of your presentation. Print it at least one day in advance, instead.