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Anto01 ef868e7953 Initial AON3D M2+ dual MCU configuration

- Octopus Pro: Motors (MOTOR0-7), bed heater (PA1), chamber heater (PB10)
- Azteeg X3: Thermistors, endstops, probe, fan, hotend heaters
- IDEX setup with external DM542T drivers
- Includes wiring documentation and swap guide

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

2026-01-12 20:52:58 -05:00

6.9 KiB

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AON3D M2+ Wiring Guide - BTT Octopus Pro v1.0.1

Motor Driver Connections (External DM542T)

Since you're using external DM542T drivers, only STEP, DIR, and ENABLE signals are needed from the Octopus Pro. The drivers handle their own current and microstepping via DIP switches.

Motor Pin Assignments

Motor	Function	Octopus Header	STEP Pin	DIR Pin	ENABLE Pin
MOTOR0	X Axis (Carriage 0)	MOTOR0	PF13	PF12	PF14
MOTOR1	X2 / Dual Carriage	MOTOR1	PG0	PG1	PF15
MOTOR2	Y Axis	MOTOR2	PF11	PG3	PG5
MOTOR3	Y1 Axis	MOTOR3	PG4	PC1	PA0
MOTOR4	Z Axis	MOTOR4	PF9	PF10	PG2
MOTOR5	Z1 Axis	MOTOR5	PC13	PF0	PF1
MOTOR6	Extruder 0	MOTOR6	PE2	PE3	PD4
MOTOR7	Extruder 1	MOTOR7	PE6	PA14	PE0

DM542T Wiring per Motor

Octopus Pro Motor Header     DM542T Driver
========================     =============
STEP (pin 2) ───────────────► PUL+
GND  (pin 1) ───────────────► PUL-

DIR  (pin 3) ───────────────► DIR+
GND  (pin 1) ───────────────► DIR-

EN   (pin 4) ───────────────► ENA+
GND  (pin 1) ───────────────► ENA-

Note: The Octopus Pro motor headers have a 4-pin connector:

Pin 1: GND
Pin 2: STEP
Pin 3: DIR
Pin 4: EN (active low)

Endstop Connections

Endstop	Function	Octopus Pin	Header
DIAG0	X Min (Carriage 0)	PG6	DIAG0
DIAG1	X Max (Dual Carriage)	PG9	DIAG1
DIAG2	Y Min	PG10	DIAG2
DIAG3	Y1 (optional)	PG11	DIAG3
DIAG4	Z Min	PG12	DIAG4
DIAG5	Z1 (optional)	PG13	DIAG5
Probe	Bed probe	PG15	PROBE

Endstop Wiring

Endstop Switch          Octopus Pro
==============          ===========
Signal ─────────────────► S (Signal)
GND ────────────────────► G (Ground)
(VCC optional) ─────────► V (+5V for powered sensors)

Heater Connections

Heater	Function	Octopus Pin	Header	Max Current
HE0	Extruder 0 Hotend	PA2	HE0	5A
HE1	Extruder 1 Hotend	PA3	HE1	5A
HE2	Chamber Heater	PB10	HE2	5A
HB	Heated Bed	PA1	HB	10A (use SSR for high power beds)

Important: For high-power heated beds (>10A), use a Solid State Relay (SSR) controlled by the HB output.

Thermistor Connections

Sensor	Function	Octopus Pin	Header
T0	Extruder 0 Temperature	PF4	TH0
T1	Extruder 1 Temperature	PF5	TH1
T2	Chamber Temperature	PF6	TH2
TB	Bed Temperature	PF3	TB

Thermistor Wiring

Thermistor              Octopus Pro
==========              ===========
Wire 1 ─────────────────► T (Thermistor signal)
Wire 2 ─────────────────► G (Ground)

Fan Connections

Fan	Function	Octopus Pin	Header
FAN0	Part Cooling (optional)	PA8	FAN0
FAN1	Part Cooling 2 (optional)	PE5	FAN1
FAN2	Chamber/Enclosure Fan	PD12	FAN2
FAN3	Hotend Fan 0 (optional)	PD13	FAN3
FAN4	Hotend Fan 1 (optional)	PE4	FAN4

Power Connections

Main Power Input

VIN: 24V DC (or your system voltage)
GND: Ground

Motor Power

The DM542T drivers have their own power input - connect them to your 24-48V power supply as per DM542T specifications.

DM542T DIP Switch Settings

Set the DIP switches on your DM542T drivers to match the Klipper configuration:

Microstepping (match `microsteps` in config)

Microsteps	SW5	SW6	SW7	SW8
16 (X,Y,E)	OFF	ON	ON	OFF
4 (Z axes)	ON	ON	OFF	OFF

Current Setting (adjust for your motors)

Refer to DM542T documentation for current settings based on your stepper motor specifications.

Octopus Pro v1.0.1 Header Layout

┌─────────────────────────────────────────────────────────────┐
│                    BTT OCTOPUS PRO v1.0.1                   │
├─────────────────────────────────────────────────────────────┤
│                                                             │
│  [MOTOR0] [MOTOR1] [MOTOR2] [MOTOR3] [MOTOR4]              │
│     X       X2       Y       Y1       Z                    │
│                                                             │
│  [MOTOR5] [MOTOR6] [MOTOR7]                                │
│     Z1      E0       E1                                    │
│                                                             │
│  [HE0] [HE1] [HE2] [HB]    ← Heater outputs                │
│                                                             │
│  [TH0] [TH1] [TH2] [TB]    ← Thermistor inputs             │
│                                                             │
│  [FAN0-5]                   ← Fan outputs                  │
│                                                             │
│  [DIAG0-7]                  ← Endstop/diagnostic inputs    │
│                                                             │
│  [PROBE]                    ← Probe input                  │
│                                                             │
│  [USB] [POWER]                                             │
│                                                             │
└─────────────────────────────────────────────────────────────┘

Flashing Klipper to Octopus Pro

SSH into your Raspberry Pi:
```
ssh pi@192.168.86.20
```
Build Klipper firmware:
```
cd ~/klipper
make menuconfig
```
Configure for Octopus Pro v1.0.1:
- Micro-controller: STMicroelectronics STM32
- Processor model: STM32F446
- Bootloader offset: 32KiB bootloader
- Clock Reference: 12 MHz crystal
- Communication interface: USB (on PA11/PA12)
Build:
```
make clean
make
```
Flash via SD card:
- Copy out/klipper.bin to SD card as firmware.bin
- Insert SD card into Octopus Pro
- Power cycle the board
Find the serial port:
```
ls /dev/serial/by-id/*
```
Update printer.cfg with the correct serial port.

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