Thread: ROS and curved surface
10-06-2004, 09:47 PM #1
- Join Date
- Sep 2002
- Charlotte, NC
ROS and curved surface
1) Can a ROS produce a flat surface across a 2 inch board?
2) Now that my four cabinet legs are all slightly convex, after finishing with my ROS, how do I get my mortise and tenon joints to close tightly?
The ROS slightly curved the edges of my legs downward, so when I drive the mortise home, the inside of the stretcher contacts the leg when the outside of the stretcher is about 1/64" from the leg.
Any ideas to fix the problem, short of re-planing the legs? And is this my fault, or are ROS prone to producing a convex shape across narrow stock? I rough sanded with the ROS at 100 and 220 grit, then I finished with a sanding block and 400 grit.
10-06-2004, 11:11 PM #2
- Join Date
- Sep 2004
- Northern Colorado
RE: ROS and curved surface
Yes they do that when the workpiece is less than the width of the abrasive disk. Ganging up narrow pieces to get better/broader support for the sander helps a lot. To remedy the damage, hand sand the joint area with a flat wooden sanding block and 150-220 grit paper.
After a similar experience I now hand sand critical areas. A little hand sanding makes me better appreciate the machines anyway.
Measure once... cut twice.