Well after having my JGRO up and running for a while I decided I wanted to design a new router to better suit my needs. It needed to be smaller, stiffer, more accurate and faster. I drew my ideas from sites like buildyourcnc and from other plans like David Steele's work and from many users on this forum.
Main bed assembly.
Underside with adjustment screws to tension the v-bearings onto the alum rail.
Things turn out so much nicer on your second machine when you have a CNC to cut out all the parts .
Bearing supports for the drive screws (5/16 All thread).
Assembled and ready to be taken apart for finishing.
All joints between the MDF pieces are made with cross dowels and 1.5" bolts. Nearly every bolt on the machine is a 1.5"...made assembly quick and easy.
Finished the MDF with 2 coats of satin minwax polyurethane. Did a light sanding with 220 between coats (still wet in this pictures hence the shine).
Reassembled and ready for testing, after I jogged the machine around and ran some test codes with a sharpie I placed it into its new and improved soundproof box (not pictured) to contain the dust and noise (which it does a phenomenal job of)!
A quick sharpie test before I installed the milling bed onto the table top.
Once I saw that my moving bed was close to perfectly level I cut out 2 pieces of 1/2 MDF to act as my main milling bed (a "spoil" board if you will). I laminiated the sheets together and ran counter sunk bolts thru it to hold it to the main table. I used the machine to layout a grid of 9mm holes to accept some metal blind nuts and then milled my working area (~12" x 16") down 0.1" to get a dead level surface. After that was all said and done I applied 2 coats of polyurethane to seal the MDF fibers and give the milled surface some durability. Any cuts I make I throw a small 1/8" spoil piece underneath to prevent cutting the machining bed up (I will get some pictures up shortly of the new cutting bed...its pretty sexy).
Cutting some hold down clamps (which I laminate together to gain rigidity).
My main design change was to increase stiffness so I could mill aluminum which I am happy to say cuts like butter with the new machine (1/8" thick in this picture).
Overall my accuracy into wood is sitting within 2-3 thousands of an inch. The inner holes on aluminum is within 2-3 thousands as well but profiling operations on the outside seem to be further out closer to the 5-8 thousands territory. Mind you this is running with simple HDPE lead screw nuts and no backlash nuts to speak of...I will be improving this but as it stands right now it is much more accurate then I need! So far I can jog the machine 2 times as fast as the old one (~60"/min) but I still limit most of my cutting to the 30"/min territory unless I am working on a larger piece.
Thanks to everyone for idea's and build threads! They are a great source of inspiration!