I am playing with a NUARC 26 for the first time and when I turn on the vacum I just get a noise. I put a paper between the rubber and the glass and the paper doesn't move up. Does anyone knows how the vacum is supposed to work? My machine also has a tube (bot very long) that comes out at the back of the unit and it comes from the vacum area under the machine, is this tube supposed to hang back there? My other question is about the time, how do I determine time base on the units the machine has. I would appreciate any help with this. Jaime.