MachineContactLarge - Large Machine Contact

@@ -1,7 +1,7 @@ # MachineContactLarge  Adom **press-fit machine pin contact** (Large) for the Adom modular electronics-system. A machine **contact** (`MC`) is a purely electrical receptacle pressed into a+system. A machine **contact** (`MC`) is a receptacle pressed into a plated through-hole on a molecule or scaffold. It accepts a machine **pin** (`MP`) tail, a machine **needle**, or a bare wire, forming the solderless junction that ties molecules to the workcell control panel and to each other on the 32mm scaffold grid. This page carries@@ -9,24 +9,27 @@ the KiCad + Fusion 360 `.lbr` library, STEP, and an interactive 3D view.  ## What it is and where it goes -Large machine contacts are the electrical backbone of the **base scaffold** (an 18x18 grid-of large contacts at 32mm pitch) and of large-class molecules. They carry power and signal-between stacked boards. Unlike machine pins, whose primary job is mechanical (the factory-pincers grip them), a contact's function is **purely electrical**. Large contacts are-pressed directly into the board, and also press into the tops of large machine pins so that-pins, needles, and wires can be inserted into a stacked assembly.+Large machine contacts populate the **base scaffold** (an 18x18 grid of large contacts at+32mm pitch) and large-class molecules. Their role depends on where they sit. **On the base+scaffold they are purely mechanical** - that grid is not electrically connected, so the+contacts serve only as the mechanical mounting interface that molecules and scaffolds seat+into. **Everywhere else (molecules, user scaffolds) they are electromechanical** - carrying+power and signal between stacked boards in addition to providing the mechanical interface.+Large contacts are pressed directly into the board, and also press into the tops of large+machine pins so that pins, needles, and wires can be inserted into a stacked assembly.  ## Rating and wiring  | Property | Value | |---|---|-| Current rating | ~20.8 A |-| Mating wire | 14 AWG (precision-bent, enamel-coated) |-| Mates with | Large machine pin tail (Ø1.85 mm), large needle, or 14 AWG wire |-| Grid pitch | 32 mm (large class); any integer multiple of 2 mm |+| Current rating | ~20.8 A (80% derated) |+| Mating wire | 14 AWG solid core (precision-bent, enamel-coated) |+| Mates with | Large machine pin tail (Ø1.85 mm), large needle, or 14 AWG solid-core wire |+| Grid pitch | 8 mm (technical); 32 mm is a common implementation (e.g. the base scaffold) | -The rating is contact-limited: a large machine pin can carry more current, so the 20.8 A-figure is set by the contact, not the pin.+The rating is contact-limited (a large machine pin can carry more, so the 20.8 A figure is+set by the contact) and is quoted at an **80% derating** for margin. The mating wire is+**solid core** (the enamel coating implies this, but it is called out explicitly).  ## Mounting: press-fit into a plated through-hole 

@@ -4,7 +4,7 @@   "slug": "machinecontactlarge",   "title": "MachineContactLarge",   "brief": "Adom Large press-fit machine pin contact (Ø2.62 hole / Ø4.40 ring, ~20.8 A)",-  "version": "1.1.2",+  "version": "1.1.3",   "tags": [     "adom",     "adom-modular",