Available from Biesse, the Viet Opera R is a robotized sander for MDF routed and primer coated doors with internal square corners, such as Shaker-style doors, as well as the removal of cross grain scratching of solid wood doors. The company says the Opera R can machine panels with the grain, in any orientation. It can also machine parts with different levels, such as the inner side of profiles, 5-part doors and window frames.A patented system located inside the robotic unit, the control force intelligently measures the amount of abrasive pressure applied to the panel, Biesse adds.