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Wiring & Electronics

See Owner-Reported Hardware and Test Status for the confirmed V3.0 hardware, connections and remaining checks.

This section documents the electrical architecture, wiring, controller configuration and hardware interfaces of the My-Cloner Rev A.

The My-Cloner Rev A uses a 24 V DC electrical system, an MKS Robin Nano V3 controller, TMC2209 stepper drivers and a Raspberry Pi Zero 2 W running Klipper and Mainsail.

Work in Progress

The My-Cloner Rev A is assembled. A clean Klipper installation and renewed commissioning are planned.

Board-level information may already be confirmed while some My-Cloner-specific connections remain marked as pending validation.

Items should only be marked as Validated after successful testing on the physical machine.

Electrical Architecture

The main power and control architecture is:

graph TD
    AC[230 V AC] --> IEC[IEC C14 Inlet]
    IEC --> SW[Switch + Fuse]
    SW --> PSU[Mean Well LRS-350-24]

    PSU -->|24 V DC| BOARD[MKS Robin Nano V3]
    PSU -->|24 V DC| LM[LM2596]
    LM -->|5 V DC| PI[Raspberry Pi Zero 2 W]

    PI -->|USB| BOARD

    BOARD --> DRIVERS[5 x TMC2209 Drivers]
    DRIVERS --> MOTION[X / Y / Dual Z / Extruder]

    BOARD --> HOTEND[Hotend Heater]
    BOARD --> BED[Heated Bed]
    BOARD --> FANS[Cooling Fans]

    THERM[Thermistors] --> BOARD
    PINDA[P.I.N.D.A. V1] -->|Z- / PC8| BOARD
    FILAMENT[IR V0.4 Filament Sensor] -->|MT_DET1 / PA4| BOARD

Documentation

  • System Overview

    Understand the complete My-Cloner Rev A electrical architecture and how the main subsystems work together.

    System Overview

  • Power Distribution

    AC input, IEC inlet, Mean Well power supply, 24 V distribution and the 5 V Raspberry Pi supply.

    Power Distribution

  • Controller Board

    MKS Robin Nano V3 hardware, STM32F407 MCU, driver interfaces, heaters, sensors, fans and auxiliary connections.

    Controller Board

  • I/O Map

    The central mapping between physical devices, board connections, MCU pins, Klipper sections and validation status.

    I/O Map

  • Motors & Homing

    TMC2209 drivers, five stepper motors, dual Z architecture, UART and X/Y sensorless homing.

    Motors & Homing

  • Heaters & Temperature Sensors

    Hotend and bed heaters, thermistors, thermal protection, PID calibration and temperature validation.

    Heaters & Temperature Sensors

  • Fans

    4010 hotend cooling, 5015 part-cooling, Robin Nano fan outputs and PWM validation.

    Fans

  • Display & Filament Sensor

    MKS TS35 V2.0 integration, EXP interfaces and the MK3-style IR filament sensor.

    Display & Filament Sensor

For a first-time My-Cloner electrical build, follow the documentation in this order:

  1. System Overview
  2. Power Distribution
  3. Controller Board
  4. I/O Map
  5. Motors & Homing
  6. Heaters & Temperature Sensors
  7. Fans
  8. Display & Filament Sensor

The sequence follows the engineering workflow:

understand → power → controller → map → motion → heating → cooling → auxiliary interfaces

Source of Truth

Information Authoritative Source
Mechanical design Current My-Cloner CAD / prototype
Components My-Cloner Rev A BOM V2
Electrical wiring Current My-Cloner electrical schematic
Board-level pin mapping Official Makerbase MKS Robin Nano V3 documentation
Klipper board mapping Official Klipper MKS Robin Nano V3 configuration
My-Cloner I/O assignments I/O Map
Final firmware configuration Planned My-Cloner Rev A printer.cfg; release pending physical validation

Documentation vs Validation

Official board documentation can confirm what a pin or connector does.

It does not automatically validate how that resource is used by the My-Cloner.

My-Cloner-specific assignments must be checked against the electrical schematic and validated on the physical Rev A machine.

Current Bring-Up Status

Use the shared Status Definitions, including TBD for an undecided value and Pending validation for an outstanding check.

The machine is assembled and previous tests were performed. No earlier printer.cfg is available; a clean Klipper/Mainsail installation and new configuration are planned. The remaining checks concern commissioning and calibration.

These include:

  • P.I.N.D.A. PC8 input polarity, offsets and repeatability
  • FAN1 / FAN2 control behaviour, PWM and airflow
  • IR V0.4 sensor polarity and runout behaviour on MT_DET1 / PA4
  • TMC2209 current values
  • X/Y sensorless-homing thresholds
  • Motor directions
  • Bed thermistor curve and both temperature readings under the new configuration
  • Heater operation under the new configuration
  • PID calibration
  • Thermal limits
  • MKS TS35 V2.0 integration
  • Final printer.cfg

These items will move from Pending validation to Validated during the Rev A bring-up process.

Safety

Mains Voltage

The printer contains 230 V AC mains wiring.

Disconnect the printer from the mains supply before opening or modifying the electrical system.

First Power-On

Do not attempt a complete printer power-on immediately after wiring.

Validate the system in stages, beginning with the mains input and power supply before connecting sensitive electronics.

For the complete pre-power procedure:

Before First Power-On