N Compass

[whiskywill]

Does anybody have any experience of this router circle cutting jig thing? http://www.m-powertools.com/products/n- ... ompass.htm
I am thinking of using one for routing grooves for rosettes and soundholes on stringed instruments, so it needs to be accurate.

 

[whiskywill]

That's a big fat no, then.

 

[jimi43]

Cutting circles with a router is easily done...and can be adjustable...with a simple cheap jig....

When I cut the speaker grille holes on the AC30 clone I made a while back I cut out a thin ply sheet which you can see in the photo:

I took the original plastic base off...fitted this one with a row of holes radiating out to the pointy bit....

The holes had a pop rivet pin pushed through. The piece then had a similar hole at centre point and then the router rotates around the pin.

Simple!

Jim

 

[whiskywill]

Thanks for the tip jim, but I have a selection of circle cutting jigs which came with the several routers that I have. I want very fine adjustment to do things like cutting a groove 2.4mm wide using a 1.6mm spiral downcut bit. I don't thing a pin in a piece of ply will give me that accuracy.

 

[jimi43]

Hi WW

Just put a small block at the extreme connected with another block further down and connect the two with a fine thread bolt...that way you have a micro adjustment.

Jim