H36 Combo V1¶

Introduction¶

H36 Combo V1 is a newly designed high temperature tool board running Klipper firmware. Based on STMG0B1T3, the maximum operating temperature can reach 125 degrees Celsius (CAN only). It also provides two communication methods: CANBUS and USB. The onboard USBHUB has up to two USB interfaces (or one CAN and one USB), which can be used to connect to the IDM Scanner Leveling Sensor camera, etc.

Featrues¶

• STM32G0B1T3 MCU, up to 125 degrees Celsius, supports Klipper Firmware
• 6-layer PCB design, all solid capacitors and tantalum capacitors, better heat dissipation
• Onboard IO controlled CAN/USB switch,
• Onboard RESET and BOOT0 buttons for easy firmware update
• Fan control/heating both use independent high-power MOS, safer and lower heat generation
• Onboard 5V@3A DC-DC, 5V peak load can reach 15W
• XT30 interface, custom cable comes with the board
• Onboard USB2.0 HUB, 3x USB2.0 interface (one of which is connected to MCU)
• Support CAN / USB2.0 connection
• Onboard TMC2209
• 3x 3pin Fans, 3x IO with level converter, 1x RGB,1x Heat, 1x thermistor,1x status LED
• ADXL345 Accelerometer onboard
• USB-C onboard for Firmware update

Application¶

Print Head with NEMA14/36mm Motor

Hardware specification¶

Operating limits¶

Physical Connections¶

Pin Out¶

IO.0: PA15
IO.1: PC7 
IO.2: PA8
IO.3/RGB0: PA10
IO.4/RGB1: PB1

FAN0: PA9
FAN0_TACH: PC6 
FAN1: PB15
FAN1_TACH: PB14
FAN2: PB13
FAN3: PA5
FAN3_TACH: PB0

Heat: PA7
Thermistor (2.2k pull up): PA6

Driver_EN: PB7
Driver_DIR: PB8
Driver_STEP: PB9
Driver_UART: PC14
Driver_DIAG: PC15

ADXL345
spi_bus: spi2
adxl345_cs_pin: PB12
adxl345_spi_software_sclk_pin: PB10
adxl345_spi_software_mosi_pin: PB11
adxl345_spi_software_miso_pin: PB2

CAN_RX: PD0
CAN_TX: PD1

5V_Monitor: PA0
24V_MOnitor: PA4
Thermistor next to TMC2209 (4.7k pull up) : PA3

CAN USB switch: PA2
# logic Low = COM to A PORT  CANBUS 
# Logic High = COM to B PORT  USB

Description of Connections：¶

IO.0 and IO.1 are located in the same connector and can be used as XY endstops, and IO.2 can be used as a probe. In addition, IO.0 - IO.5 have level conversion (with pull-up resistors) , IO.01, IO.2 have voltage selectors (5V or 24V) pin header, IO.3 IO.4 have voltage selectors (5V or 24V) pads. All the IOs can be used as inputs or outputs, such as RGB ,Servo, Endstops, and can be configured according to your other needs.

LED indications：¶

USB / CAN selection¶

XT30 and USB2/CAN both use CAN to communicate

XT30 and USB2/CAN both use USB to communicate

Jumpers：¶

IO.0+1 , IO.2 , Fan0 , Fan1 can select the power supply voltage through the jumper cap. As shown in the figure, the two pins on the left are connected together for 24V, and the two pins on the right are connected together for 5V.

Please note that if these interfaces are used as outputs, the high-level voltage of the output is consistent with the voltage selected by the jumper. Please make sure that your peripherals can withstand the range. Generally speaking, only SSR in the accessories of 3D printers can withstand 9-36V control voltage.

Communication¶

Connect to Pi¶

SB combo V2 can be connected to Pi via USB or CANBUS. Select by PA2, refer to USB / CAN selection.

Via CAN¶

Since the Raspberry Pi does not have a CANBUS interface, it is usually connected only after the CANBUS interface is expanded through an expansion chip. Commonly used ones include the MCP2518 SPI to CAN module (CanHat), USB to CAN module (eg: UCAN), Klipper USB to CAN Bridge Mode, and a Linux host computer with a native CAN interface (eg: CM68).

Via USB¶

When using USB connection, you can use the adapter board we provide to directly connect to the USB interface of PI.

FIrmware Guide¶

Firmware configuration and compilation¶

With Katapult Bootloader¶

If you need to use a bootloader, we recommend using katapult, the following is not configured for reference: For katapult use,refer to: https://github.com/Arksine/katapult

cd ~/katapult
make menuconfig
make flash FLASH_DEVICE=0483:df11

cd ~/klipper
make menuconfig
make 
cd ~/katapult/scripts
#when use CAN communiction 
python3 flashtool.py -i can0 -f ~/klipper/out/klipper.bin -u <uuid>
#when use USB communiction
python3 flashtool.py -d <serial device> -b <baud_rate>

Klipper with nobootloader¶

H36 uses the bootloader-free mode by default, and the configuration is as follows:

Firmware upload¶

Before executing the following commands, you need to enter DFU mode before you can compile and burn the firmware. As shown in the figure above,

• press and hold BOOT0,

• then press the RESET button for one second,

• then release RESET,

• wait for 3 seconds,

• and release BOOT0.

Use " lsusb" to check if a DFU device appears. If yes, upload firmware. If no, repeat the above steps.

make flash FLASH_DEVICE=0483:df11

https://github.com/Arksine/katapult?tab=readme-ov-file#uploading-klipper

Attachments and others¶

2D，3D , SCH and config template file, please go to our github:

https://github.com/FYSETC/H36_Combo

How to buy¶

www.fysetc.com

Technical Support Channel¶

support@fysetc.com

https://discord.gg/BX38PHWw