Here`s the code Gary sorry for the long delay, been working offsite lately, install the 3mm tool bit first, position the spindle on the material, zero all axis with the tool bit tip slightly touching the material, make sure you jog all corners to make sure it fits on the material, load the 3mm program and start plunging the pilot holes, after the program it will return to zero, turn off the spindle and press Z upwards enough to install the 6.5mm tool bit, after installing zero the Z axis again on the material, use 2% jog mode so that it will go down slowly slightly touching the material, zero all axis using "ref all home", start the spindle @ full speed (24000 RPM) and load the 6.5mm program, it`ll take you a whooping one hour and 28 minute to complete the program @ 100% FRO, use 50-50 kerosene+cooking as your lubricant just like I did on the video or you can use whatever coolant / lubricant you want available in your area by the way you dont need to worry about the depth cut, it`s only 0.25mm so it`s not gonna touch the middle part of your tool bit, it`s just like scratching the aluminum in a thin foil degree that you can run it all day without worrying of your tool bit getting dull in the middle of the program, flush the chips using compressed air and squirt some lubricant on it after blowing the chips away. enjoy milling with your router
Sorry I forgot, after all is done, extract the machined material using a metal hacksaw blade, I put a 2mm tabs on it to hold it`s place while the router is still working, grind the tabs to the level of your material, drill the pilot holes using a drill press to make it through the other side. it`s faster to just drill it than include it to the program because I was worried of the total height (40mm) using a 1/8 tool bit to create a 40mm long hole is too risky, I also doubt there`s an available 1/8 dia. 50 mm long available (40mm+10mm for the chuck to hold), the last time I used to cut 60mm thick aluminum it was just a straight long bit custom sharpened into a single flute. and the hole I cut on the model is 60mm in diameter not 8mm.