|Project by rwyoung||posted 01-11-2009 06:04 AM||2654 views||2 times favorited||2 comments|
My day job is electrical engineer. For a number of years I worked as a contract engineer and during that time inhereted a LPKF Protomat circuit board milling machine. These are 3-axis CNC machines intended for high accuracy, fine milling of copper traces on prototype circuit boards. But they can also cut arbitrary shapes. Standard FR-4 is 1/16” thick (other sizes can be had) so by stacking up 4 copies of the same pattern I made a simple 1/4” test pattern. This was used to make the cut-outs in my In-Out box project.
I believe I could have used 3 layers for a total patern of 3/16” but I err’d on the fat side on this one. Pretty simple pattern with just two curves and a straight area.
Worked very well with a 1/2” top bearing flush cutter and walnut.
Pictured is the stack of 1/16” material double face taped to make a 1/4” template, a 1/2” cutter with top bearing and all mounted in my table. The plate is the Harbor Freight knock-off of the Rouseu.
-- Don't sweat the petty things and don't pet the sweaty things.