MFS Setup for Radius on Inset Sink Unit

[stodge]

Hi All,

Relatively new MSF owner with an OF1010 and I looking to inset a new sink into a benchtop but it isn't fully square and has a 13 mm radius on each corner that will need to be inset into the top by about 1-2 mm. How do I set up the MFS for this? I assume I need a copying ring at 26 mm (that I cannot find) to support a 13 mm radius as it hits the corner of the MFS. Am I missing something? is there another way to achieve the same goal?

Many thanks...

 

[GarryMartin]

The size of the copy ring (in combination with the cutter size) determines how far away from the MFS profile your cut will be, nothing more. To get a 13mm radius in a corner, you need a 26mm cutter.

With a few calculations, you should be able to use a 26mm cutter with an appropriate copy ring for the corners, and then a smaller cutter with an appropriately sized copy ring to match the MFS size for the top, bottom, and sides of the cutout.

Can I recommend a couple of guides if you are new to the MFS?
http://www.festoolownersgroup.com/CoppermineMain/albums/Brice Burrell/Festool_MFS.pdf by [member=1146]Brice Burrell[/member]
http://static1.1.sqspcdn.com/static/f/962087/13205584/1310688549607/Advanced+Cutting+and+Routing+Techniques+Using+the+Festool+MFS+Fence+System+reduced.pdf?token=hnw6z1FpXkuvxBJ9euR8Xg5kqYo%3D by Jerry Work

There have been some 3D printed "fillets" for the MFS that insert into the corners that could be used to achieve a radius, but you'd need to custom design and print something for your 13mm radius.

 

[stodge]

I knew there was an obvious answer. of course a 26 mm cutter would do the job (doh!) thanks for pointing it out as I was completely focussed on the MFS and not the actual router as i should have been...new toys and all that.

Also, thanks for the guides, great reading and given me lots to think about.

Thanks again.