robotics atomization extrusion

I am actually an Internet Marketer (and only have the pleasure of being involved with your forum through my affiliation with one of this forum's founders.) I find that many of my customers are in engineering, and I look far and wide for forums and blogs on their specific topics. Robotics, extrusion, and atomization are three of the areas where I look for forums/blogs but I almost never find any. Any suggestions?