This is my first 3D printer build based on the Hadron ORD bot design. It’s made from an extrusion called MakerSlide which allows the design to be pretty low cost and robust. Because of the hollow profile it allows most cable routing to be run through the centre of the profiles, keeping the build nice and clean.
For the electronics, I chose the Azteeg X1. It’s low cost and tiny. It can run most available firmware and fully integrates everything needed. The standard connectors have been swapped for 0.1″ screw terminals.
The Stepstruder MK7 is used as the extruder. It takes 1.75mm filament and comes with a stock nozzle with an extrusion diameter of 0.4mm. The small PCB above the extruder (MakerBot safety cutoff switch) is a hardware safety cut off designed to cut power if the extruder overheats for any reason.
All of the cabling is run through 8mm stainless steel extension springs. By using proper connectors throughout, the idea is that every moving part can simply be unplugged, rather than having to be desoldered or other less than ideal solutions. A standard multipole connector was used for motors and the extruder, JST-XH used for the bed limit switch / bed thermistor and a high current EC3 connectors (rated at 60A continuous) for the heatbed 12V supply.
A few improvements were made to the standard Hadron mechanics including swapping the default 1mm steel motor mounts for 3mm stainless steel laser cut brackets and flexible motor couplers. A new modified laser cut bed mount was designed to include cable routing and spring clamps.
The cabling was a mix of LÜTZE Superflex 4 core cable for motors, twisted pairs from a good quality ethernet cable and high temperature silicone cable for the heat bed.