Printing long page continously in smartform

Hi,

I have Requirement where we are printing Retail Bill using smartforms . We are using Small printer (Paper Roll ) which prints the paper continuously until end.I have created my own PAGE format (width 7 cms and Height 50 cms) . The Problem is that when I give large number of Items(Materials) as input .

Its is nt Printing completely till end . The printin stops at 30cms .

Can any one Suggest the Solutions.