This is a CNC router designed to be a low cost alternative. The primary structural component is .732 birch A-grade plywood. All axes  ride on aluminum rails via v-groove bearings. The accuracy is .001 inch, repeatability is .003 inch. The platform is LinuxCNC and has proved to be very stable, reliable and infinitely configurable via python and hal scripting. The work envelope is about 33x23 inches. I used Dolphin CAD/CAM for building g-code files. The steppers are NEMA-23 driving 5 start ACME screws
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