Hi guys,
the question is within the topic title. I just do not get it. To get a beam to a second head you need to split it so each head can get roughly 50% of a tube power. Actually it will be less than 50% because of all mirrors that are not 100% effective. Then you are loosing a bit of power on a second head because of its mirror.
How can anyone be convinced it doubles machine production?
And yet a lot of laser makers make them claiming it and customers are falling for it.