Hello All, The only ROS I have used with any amount of time are the two Festools I own; a 6 inch Rotex (about 3 years old ) and a 5 inch finish sander. When using the Rotex as a ROS or the 5 inch I notice that the pad spins rapidly when minimal downward pressure is applied. If I bear down on it the pad will slowly rotate, much like a second hand on a clock. Which is the best way to use these machines? Am I risking sander failure if I push too hard? Am I causing whirling if I let it rest by gravity alone? Also, what vaccum setting do you use? Do you vary the suction depending on the grit being used or do you keep it constant? I do notice whirling with the Rotex (6mm oscillation, I think) when sanding with 180 grit and larger but I can make that disappear with finer grit or by going to the 5 inch finsih sander (2mm oscillation). Any comments or criticisms are welcome. Marc (taking a break from sanding a 84 x42 Cherry door;
6 inch stiles, 51/2 inch rails - top, bottom and middle, all 8/4. 4/4 T&G boards as filler, 6 across. It's a sliding door for my neighbor's wine cellar.)- posted
15 years ago