This is the first cut of my Probotix X90 CNC. Absolutely amazing!

I am using the EMC2 Linux CNC installed on an old computer installed using their Live/Bootable CD.

The model was created in Sketchup 2013 then exported to STL using this plugin :

http://www.guitar-list.com/download-software/convert-sketchup-skp-files-dxf-or-stl

Then I used MeshCAM 5 to convert the STL to GCODE file.

As a cutter I used a 1/16 4 flute carbide bit normally used for PCBs – the only one that I had available, but specialized 2 flute cutters should work better – I might try that. You’ll see this bit creates a lot of burring so parts needed cleanup.

The bit is mounted in my trusty Dewalt DWP611 router :
http://www.amazon.com/gp/product/B0048EFUV8/ref=as_li_qf_sp_asin_il_tl?ie=UTF8&camp=1789&creative=9325&creativeASIN=B0048EFUV8&linkCode=as2&tag=librarian06-20

I am using a 1/4 to 1/8 collect adapter since the DWP611 comes with only 1/4 adapter.
http://www.amazon.com/gp/product/B0015YL1WQ/ref=as_li_qf_sp_asin_il_tl?ie=UTF8&camp=1789&creative=9325&creativeASIN=B0015YL1WQ&linkCode=as2&tag=librarian06-20

It gives me good run-off of max 2-5mil which is ok for my application.

However ultra-precise collets can be found here:
http://www.precisebits.com/products/equipment/dewalt_611_kits.asp?tsPT=!!!Dewalt_611!!!Kit!!!PG!!!

They claim a runout of ~  0.4 mil

Here is the final result, I simply glued 2 parts together to make them thicker. You’ll see that this is a servo mount for 9g Hitec servo on 13x13mm aluminum tubing that I got from HobbyKing

 

20140101_202821

Hope this helps. Happy CNC-ing !

-s