I was in the need of some finger joints, and decided to see if I could make a fixture for my CNCCS builds. I have done something similar with the KRMx02 in the past with a removable section in the table, but could not use it as, the KRMx02 is currently undergoing some conversions.
Here is what I came up with:
Attachment 427792
It consists of a piece of 3" x 3" x 17" 15 series thick walled extrusion that is attached to a birch plywood table top. There is also a piece of 2" x 2" x 20", 1/4" steel angle attached to both the extrusion and the plywood.
The thing I am going for here is rigidity. I thought about using aluminum plate for the base instead of the plywood, but it would have been too heavy to place on and off the machine.
A note about the table top (base)
I have several removable table tops, that I use for various operations. The base used for this project was based on those designs so that it could be easily attached and removed as needed. The only real difference is that instead of 20-1/2" wide it is 20-1/4" wide. The reason for this is that I have added some dust guards and they need an extra 1/8" clearance on each side.
You can see my table top write-up here:
http://www.kronosrobotics.com/cnccstables1