Hello everyone!
I am looking for some design feedback on my first CNC build. The footprint is 20" x 27" x 23.5" tall. I should have a cutting area of about 16" x 24" x7" if I were to clamp my work pieces directly to the table. I will mainly be machining aluminum, but may do some steel from time to time if I ever setup flood cooling (and want to deal with the mess associated with flood cooling). All structural parts are made from hot rolled steel, which will be milled flat and painted. I am thinking of using 15mm linear rails, simply because they are the cheapest I could find that still seem to have decent quality. I am planning on using 16mm ballscrews, with the Z-axis at 300mm, y axis at 550mm and x axis at 600mm. I am planning on using M8 bolts to bolt all the structural pieces together. The motors I am planning on using are leadshine 86CM45 due to their cost, power requirements, and reasonably large torque numbers.
What do you all think of this design? I am not necessarily chasing micrometers, but I would like something that is rigid and can make me some parts within a reasonable tolerance (maybe .005" or so).