[João Carimo]

A laser printer has a very fast switching laser diode (on/off).
You know you´re write...

I hope I am wrong, but try to compare the laser power of a known machine to your printer. If the difference is big, you're better off by CNC driving 2 mirrors (X/Y).[/QUOTE]

Perhaps it might be cheaper this way...
But the point is to reuse the printer´s availlable drivers and software...

Thank's for the tip.
I will not forget this approach.