Thread: Jig for Table Saw Cove Moulding

There's no jig as such - you just clamp a fence to the table at the angle you want.

The jig I've seen is a parallelogram thing that you can use to make it easier to work out the angle to set the fence at. It's two long bars connected to each other by two shorter ones with wing nuts, so you open it out to the width you want the cove and then place it over the blade, then rotate it until the long bars just touch the blade on either side. That gives you the angle to set the fence. Hard to explain in words. But is that what you're after?

There have been a couple of articles about cutting coves on table saws in FWW.


http://www.taunton.com/finewoodworki...F.aspx?id=2899

http://www.taunton.com/finewoodworki...F.aspx?id=2294

Thanks for that. What you have described seems to be the thing I had seen somewhere. My problem is that I have to duplicate a moulding on a broken door panel and thought that a jig would make it a little easier.

If I was doing this, I'd probably lay the panel I was copying on the saw table and wind the blade up until top-dead-centre just touches the top of the cove, then rotate the panel until the blade contacts the bottom of the cove, You'll probably be able to see how good a match it will be by sighting along the cove and seeing whether the blade contacts it along it's arc. Would be a bit of trial and error involved.

The parallelogram jig might help but you'd need to double the width of the half-cove in the panel to determine the full cove width and set the bars to that. That would give you the angle but getting the fence in the right place would be a bit of trial and error I think.

Thanks silentC, I will give your tip a go and see how it comes out. I figure I'll be doing a fair number of test runs before I get to 'operate' on the real material. Thanks guys.

J

There is such a jig available from Rockler.

You can view it here.
http://www.rockler.com/product.cfm?page=17468

Pretty much what Silent said - just clamp a fence to the table.
This spreadsheet may help. If you're working on the width of the cove rather than the radius, keep tweeking the radius until you get the width you want.