laser divergence and machine size

[educa]

Hi,

I am almost ready to buy my laser tube, but my machine travel is larger then buildlog model.
My machineable distance is around 1,2 x 0,6 meter (4'x2')

I would like to buy a 80watt industrial reci tube.

Because the machine is bigger, the laser beam will at farthest have to travel around 7 foot distance.

Would that be possible? Won't my laser beam become too big before hitting my lens because of beam divergence?

Does anyone have any hints about beam size and divergence ?

Would this be possible at all? Is a 80watt tube better then a 40watt tube in such a case?

Kind regards,

Bart