Wiring Schematic
This article covers the complete wiring schematic of the Vision Miner 22IDEX V4. Use it as a reference when troubleshooting electrical connections, replacing components, or verifying wiring after maintenance. The printer uses two controller boards: a Duet 3 Mainboard 6HC (Board 0) and a Duet 3 Expansion 3HC (Board 1), connected via CAN-FD bus.
Before you begin - safety and risk
Read the Safety - Before You Begin article to understand the hazards involved in working on the Vision Miner 22IDEX V4 - including electrical, thermal, mechanical, and chemical risks. All procedures in this wiki are provided as recommendations only. By choosing to follow any procedure, you do so at your own risk.
HV Wiring Schematic
High-voltage (mains) wiring between the power supply, SSR (solid-state relay), and the main board. This section is for reference only – do not service mains wiring yourself.
Heads – Main Board Connections
Hotend heaters, temperature sensors, and extruder motors connect to the Duet 3 MB 6HC (Board 0). Both toolheads (Left / Tool 0 and Right / Tool 1) wire back to this board.
Z Motors – Expansion Board Connections
The three Z-axis leadscrews are driven by motors connected to the Duet 3 Expansion 3HC (Board 1). The expansion board communicates with the main board over CAN-FD.
| Motor | Driver | Position |
|---|---|---|
| Z Motor 1 | 1.0 | Right leadscrew |
| Z Motor 2 | 1.1 | Rear leadscrew |
| Z Motor 3 | 1.2 | Left leadscrew |
X/Y/U Motors
The XY motion system uses four motors on the main board. Two Y-axis motors run in parallel on a shared axis.
| Motor | Driver | Function |
|---|---|---|
| X motor | 0.2 | Tool 0 (left toolhead) movement |
| U motor | 0.3 | Tool 1 (right toolhead) movement |
| Y motor #1 | 0.1 | Y-axis (paired) |
| Y motor #2 | 0.4 | Y-axis (paired) |
Z-Probe
The Z-probe is connected to the expansion board (Board 1) via 1.io4.in. Probe deployment and retraction are controlled by a servo motor driven from out9 on the main board. An ESD protection output is configured on 1.out4.
Switches
Endstop switch wiring for all axes. All endstop switches connect to IO headers on the main board.
| Switch | Pin | Type |
|---|---|---|
| X endstop | io4.in | Min endstop (S1) |
| U endstop | io5.in | Max endstop (S1) |
| Y endstop #1 | io1.in | Min endstop (paired) |
| Y endstop #2 | io2.in | Min endstop (paired) |
Toolhead Wiring
Terminal block connections for both toolheads, including heater wires, temperature sensor wires, fan wires, and extruder motor cables.
Main Board Pinout – Duet 3 MB 6HC (Board 0)
Complete pin assignment table for the main board. All pin names use RepRapFirmware notation.
Stepper Drivers
| Connector | RRF Pin | Axis | Function |
|---|---|---|---|
| DRIVER_0 | 0.0 | E0 | Left extruder motor |
| DRIVER_1 | 0.1 | Y | Y-axis motor #1 |
| DRIVER_2 | 0.2 | X | X-axis motor (Tool 0) |
| DRIVER_3 | 0.3 | U | U-axis motor (Tool 1) |
| DRIVER_4 | 0.4 | Y | Y-axis motor #2 |
| DRIVER_5 | 0.5 | E1 | Right extruder motor |
High / Medium Current Outputs
| Connector | RRF Pin | Function | Details |
|---|---|---|---|
| OUT1 | out1 | Left hotend heater (H0) | PT1000 sensor on TEMP_0 |
| OUT2 | out2 | Right hotend heater (H1) | PT1000 sensor on TEMP_1 |
| OUT4 | out4 | Left hotend cooling fan (F2) | Thermostatic, activates at 70 °C |
| OUT5 | out5 | X print cooling fan (F3) | User-controlled |
| OUT7 | out7 | Right hotend cooling fan (F0) | Thermostatic, activates at 70 °C |
| OUT8 | out8 | U print cooling fan (F1) | User-controlled |
| OUT9 | out9 | Z-probe servo (S0) | 50 Hz PWM |
Temperature Sensors
| Connector | RRF Pin | Function | Sensor Type |
|---|---|---|---|
| TEMP_0 | temp0 | Left hotend | PT1000 |
| TEMP_1 | temp1 | Right hotend | PT1000 |
Input / Output
| Connector | RRF Pin | Function |
|---|---|---|
| IO_1 | io1.in | Y endstop #1 |
| IO_2 | io2.in | Y endstop #2 |
| IO_4 | io4.in | X endstop |
| IO_5 | io5.in | U endstop |
Power Control
| Connector | RRF Pin | Function |
|---|---|---|
| EXT 5V | pson | Power supply on/off (M80/M81) |
Expansion Board Pinout – Duet 3 EXP3HC (Board 1)
Complete pin assignment table for the expansion board, connected to the main board via CAN-FD (address 1).
Stepper Drivers
| Connector | RRF Pin | Axis | Function |
|---|---|---|---|
| DRIVER_0 | 1.0 | Z | Z motor – right leadscrew |
| DRIVER_1 | 1.1 | Z | Z motor – rear leadscrew |
| DRIVER_2 | 1.2 | Z | Z motor – left leadscrew |
Outputs
| Connector | RRF Pin | Function | Details |
|---|---|---|---|
| OUT0 | 1.out0 | Bed heater (H2) | 10 Hz PWM |
| OUT1 | 1.out1 | Chamber heater (H3) | 10 Hz PWM |
| OUT2 | 1.out2 | Chamber heater fan (F4) | Thermostatic, activates at 80 °C |
| OUT3 | 1.out3 | White LEDs (F6) | User-controlled |
| OUT4 | 1.out4 | Z-probe ESD protection | – |
| OUT5 | 1.out5 | HEPA filter fan (F7) | Thermostatic on chamber temp |
| OUT6 | 1.out6 | Red LEDs | PWM, 5 kHz |
| OUT7 | 1.out7 | Green LEDs | PWM, 5 kHz |
| OUT8 | 1.out8 | Blue LEDs | PWM, 5 kHz |
Temperature Sensors
| Connector | RRF Pin | Function | Sensor Type | Parameters |
|---|---|---|---|---|
| TEMP_0 | 1.temp0 | Chamber air | Thermistor | 200 kΩ, B=3950 |
| TEMP_1 | 1.temp1 | Bed heater | Thermistor | 100 kΩ, B=3950 |
| TEMP_2 | 1.temp2 | Chamber heater | Thermistor | 100 kΩ, B=3950 |
Input / Output
| Connector | RRF Pin | Function |
|---|---|---|
| IO_4 | 1.io4.in | Z-probe input |
Support
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