To help keep me sane during the last year of my PhD, I’ve commenced design and construction of a ‘Micro CNC Milling Machine’ with a working area of slightly larger than an A4 sheet.
Each axis is actuated with an in-line stepper motor attached to a threaded screw and a rotary encoder (the encoders are mainly to detect any stalling in the stepper motors, but also to accurately read micro-steps). Note: the threaded rods and encoders are not attached in this photograph.
Recently, when I visited my parents, I took advantage of my Dad’s tools to construct a number of couplers for the mechanical components. My Dad is a model engineer, so has a workshop equipped with a lathe, milling machine, drill press, and other super-handy tools for building the requisite parts.
After hand-tapping the threads for the grub screws, I managed to produce these:
This remains a work-in progress… Stay tuned!