SB CAN ToolHead

1. Introduction

The SB CAN Tool Board is a highly integrated printhead control board. Based on STM32F072, running Klipper firmware. Onboard TMC2209 stepper motor driver, AXL345 acceleration sensor, and other necessary interfaces. And comes with a 2.5m 4-core cable for easy out-of-the-box use.

1.1 Feature

• Based on STM32F072

• Onboard 1M CAN transceiver

• Onboard TMC2209

• 2x 0.5A MAX PWM interface for controllable fan (default VIN power supply, 5V optional)

• 1x signal input interface (VIN power supply, with level conversion)

• 2x signal input and output interface (5V power supply, with pull-up resistor)

• 1X 5V single wire RGB interface (1A MAX)

• 1x 4A MAX PWM output for heating rod

• 1x ADC interface for heating rod temperature acquisition

• MX3.0 2X2 interface for power and CAN signal access

• 1x Micro USB for firmware uploading

• Comes with 2.5m 4-core cable, 2x16AWG+2x24AWG

• Comes with terminal housing and wire crimping tabs

2. Hardware Guide

2.1 Install

Before you install the board, you need printed parts here. Then follow the 5 steps below.

1. You Stealburner should have to holes with heat inserts on.
2. 3D Print the pcb_spacer.STL
3. Place the PCB on the position
4. Screw it to printed head and pcb_spacer.STL
5. Follow the chapter 2.2 wiring to connect the peripherals and cover the lid.

2.2 Connectors

Connector name	Type	Details
IO.2	PH2.0-3P	PB7，for input and output, hardware pull-up 10k resistor to 3.3v with 1k series resistor.  Example:  endstops
IO.1	PH2.0-3P	PB11，for input and output, hardware pull-up 10k resistor to 3.3v with 1k series resistor.  Example:  endstops
IN.0	PH2.0-3P	PB6，default 24v with level translator, pull-up to 3.3v
MOTOR	PH2.0-4P	TMC2209 EN : PB4 DIR : PA5 STEP : PA7 SPREAD : PA15 DIAG : PB5 INDEX : PB3 RX : PA10 TX : PA9
INPUT	MX3.0 2X2P	Max 24v 5A input（16AWG）/CANL，CANH （24AWG）
TE0	PH2.0-2P	PA0，ADC，4.7K pull-up to 3.3V
HE0	XH2.54-2P	PA8，MAX 4A，PWM output，max power recommended: 60W
FAN0	PH2.0-2P	PA2，0.5A MAX PWM，for fan control (default VIN，5V selectable)
FAN1	PH2.0-2P	PA3，0.5A MAX PWM，for fan control ( defalt VIN，5V selectable )
RGB	PH2.0-3P	PB1，1A MAX sigal line RGB port, 5V，for NeoPixel, WS2812
Micro-USB		For firmware update and USB communication. Firmware update: Plug in USB first then power on.  USB communication: Power on first then plug in USB port

2.3 Wiring

As shown below, you receive not only a SB CAN Tollhead Board, but also a 2.5-meter connector and some connectors and a USB cable.

V1.1

V1.3

2.4 SCH DXF STEP

Get SCH, DXF, STEP files on github:

GitHub - FYSETC/FYSETC_SB_CAN_TOOLHEAD: StealthBurner toolhead CAN bus module for VORON

3. Firmware Guide

This is only Klipper firmware support. If you are Klipper beginner please check the Klipper firmware build here: Installation - Klipper documentation

3.1 menuconfig

3.2 Firmware Upload

For V1.1

There is Micro-USB port on the board for firmware upload. Follow the sequence below.

1. Connect SB-CAN-TH Micro-USB to Raspberry Pi USB-A port with USB cable

2. Plug in SB-CAN-TH board 24v socket to the machine PSU

3. Power on your raspberrypi (Or other SBC) and wait it boot ready.

4. Power on the 24v PSU for SB-CAN-TH board

5. Shoot lsusb command in Raspberry to check if it shows DFU port, if not go back to step 1

6. Shoot command dfu-util -R -a 0 -s 0x08000000:leave -D out/klipper.bin

7. Remove Micro-USB cable and SB-CAN-TH socket for 5s, then plug in SB-CAN-TH socket again.

8. Finished

For V1.3

There is Micro-USB port on the board for firmware upload. and a reset button for mcu reset , Follow the sequence below.

1. Connect SB-CAN-TH Micro-USB to Raspberry Pi USB-A port with USB cable
2. Plug in SB-CAN-TH board 24v socket to the machine PSU
3. Power on your raspberry pi (Or other SBC) and PSU , wait the pi boot ready.
4. hold reset button for 2 seconds, then release it
5. Shoot lsusb command in Raspberry to check if it shows DFU port, if not go back to step 1
6. Shoot command dfu-util -R -a 0 -s 0x08000000:leave -D out/klipper.bin
7. Remove Micro-USB cable and SB-CAN-TH socket for 5s, then plug in SB-CAN-TH socket again.
8. Finished

3.3 Configuration

Obtain the Klipper configuration file here , you need to get the CAN ID following CANBUS - Klipper documentation:

4. Log and known issues

4.1 v1.1

Note: v1.1 have some silk print errors below, the red letters are the right silk print.

4.2 what new in v1.3

1. Changed the connector and connecting wire that can carry a maximum current of 15A (the onboard fuse is limited to 8A);
2. Add a reset button;
3. Change to a 6-layer 2OZ PCB board to enhance heat dissipation;
4. Add a 120R termination resistor, which can be disconnected through JP3 and is connected by default;
5. Change the heating rod connector to carry larger current, up to 7A;

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