Flat timber with ROS?

**Arch Stanton** · 16th September 2007, 01:59 PM

I'm making a chair which is made up of mostly flat rectangular components except for the back. Im at the stage where I have to sand it before finishing but my technique is no good.

The parts are all flat and square and I want to keep them that way. However when I sand with my ROS I manage to round over near the edges. The parts are a couple of inches wide, I have the sander on the slowest speed and I concentrate on keeping the machine level. I don't put any downward pressure on it.

I thought this would be the right machine for the job but maybe it isn't. I have done a fair bit of googling and am a little bit surprized that others don't have any problems with this.

**javali** · 16th September 2007, 02:56 PM

This may be helpful.

**Iain** · 16th September 2007, 03:11 PM

If it is a Rotex there are different density pads, I opted for a medium when I got mine, I just let the machine sit on the flat surface in ROS mode and guide it, the machine does the rest and I have never had a rounding over problem.
I have watched people apply pressure and tilt the machine slightly (without realising it) and voila, rounded over edges.

**Frank&Earnest** · 16th September 2007, 04:09 PM

For the unskilled like me: clamp the piece between small planks of wood level with the surface. Works also for planing long thin edges.

**echnidna** · 16th September 2007, 07:41 PM

Originally Posted by Frank&Earnest

For the unskilled like me: clamp the piece between small planks of wood level with the surface. Works also for planing long thin edges.

Easy and just about foolproof this way.

**Arch Stanton** · 16th September 2007, 08:02 PM

Originally Posted by Frank&Earnest

For the unskilled like me: clamp the piece between small planks of wood level with the surface. Works also for planing long thin edges.

Thanks guys. I'll get my self organised with the appropriate clamps and timber and give it a go.

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