smoothieware-powered 6040 CNC Mill

Elegoo Mega2560 R3, DC-DC converter modules (create 5V supply from 24V), variety of circular aviation style connectors, 20x4 backlit LCD, 22mm LED indicators, USB panel mount extender cable, 12V air solenoid, optical limit sensors, microswitches, 0.187 tab terminals for the microswitches, and a screw terminal shield for the Mega2560. I <3 Amazon prime.

@agp.cooper commented that the construction quality on his unit was not very good, so here are some photos showing a few details of my machine for comparison.

Toshiba Stepper drivers. Note black aluminum heat sink underneath the PCB. The drivers are mounted in the PCB plane - leads straddle the PCB cutout edge- and are bolted to the heat sink.

Spindle is 1.5kW, water cooled. Spindle mounting brackets are machined from solid billet, Z slide brackets are 12mm plate, X slide brackets (vertical uprights) are 14mm plate. X cross member is 3.2mm thick extrusion with 2 right angles, plus the 2 sliders, lead screw, and dress panel. I measured spindle end play of 0.15 mm in X and Y, with 1-2kg of hand pressure.

Here is a diagram showing the high level connections. I'll upload a wiring schedule listing the pinouts for each connector.