Engineering

Machining

What tool to use for CNC mill or router?

Excellent three part series of articles talking about the right tools required along with many side articles providing more details. http://blog.cnccookbook.com/2016/04/19/can-figure-tool-use-cnc-mill-router-part-1-holes/ http://blog.cnccookbook.com/2016/04/26/can-figure-tool-use-cnc-mill-router-part-2-2d-profiling/ http://blog.cnccookbook.com/2016/05/10/can-figure-tool-use-cnc-mill-router-part-3-pocketing/    

Engineering

Laser Diffraction pattern research

Found a few sites/companies that manufacture difracion gratings. I should contact them and get some samples. http://worldstartech.com/products/description/60/index http://www.lasercomponents.com/us/product/pattern-generators-for-flexpoint-laser-modules/ http://www.edphoton.com/Other%20Standard%20DOEs%20English.htm