MKS THR36/THR42 CAN Tool Board for Klipper – RP2040
MKS THR36/THR42 CAN Tool Board for Klipper – RP2040
MKS THR36 / THR42 CAN Control Board for Klipper – RP2040 Hotend Tool Board
Upgrade your 3D printer's wiring setup with the MKS THR36/THR42 CAN Tool Board. Developed around the powerful Raspberry Pi RP2040 MCU, this compact toolhead board lets you replace the complex cable runs between your motherboard and extruder with a single USB or CAN bus connection — making installation cleaner, faster, and far more reliable for Klipper-based printers.
Key Features
- RP2040 MCU: Runs at up to 133 MHz with 264 KB of memory for snappy, responsive performance
- Integrated 8 MB NOR Flash for ample firmware storage
- Onboard TMC2209 Driver with UART interface for smooth, quiet extruder motor control
- CAN Bus Transceiver with integrated 120 Ω termination resistor for reliable CAN communication to your MKS motherboard
- Integrated ADXL345 Accelerometer for input shaping / resonance compensation in Klipper
- 3 Controllable Fan Outputs + 1 Hotend Heater Output + 1 NTC 100K Thermistor Input
- DC 12–24 V Power Input with a 7 A reserved current rating
- Compatible with both THR36 (for NEMA 14 / 36 mm motors) and THR42 (for NEMA 17 / 42 mm motors) form factors
- Made in Mainland China
Specifications
| MCU | Raspberry Pi RP2040 (up to 133 MHz, 264 KB RAM) |
| Flash | 8 MB NOR Flash |
| Stepper Driver | TMC2209 (UART) |
| Communication | CAN Bus, USB (A to C) |
| Power Input | DC 12–24 V |
| Reserved Current | 7 A |
| Fan Outputs | 3 controllable channels |
| Heater Output | 1 hotend |
| Temperature Sensor | 1 × NTC 100K |
| Accelerometer | ADXL345 |
Package Contents
Available in multiple kit configurations (select your option at checkout):
- THR36 Standard: MKS THR36 Board + USB A-C Cable (1 M) + 4-Pin Electronic Cable (2 M) + Heatsink
- THR42 Standard: MKS THR42 Board + USB A-C Cable (1 M) + 4-Pin Electronic Cable (2 M) + Heatsink
- Suit 1: MKS THR36 + UTC Adapter + USB A-C Cable (1 M) + 4-Pin Electronic Cable (2 M) + Heatsink
- Suit 2: MKS THR42 + UTC Adapter + USB A-C Cable (1 M) + 4-Pin Electronic Cable (2 M) + Heatsink
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Frequently Asked Questions
Q: What is the MKS THR36/THR42 CAN Tool Board used for in a 3D printer?
A: The MKS THR36/THR42 is a Klipper-compatible hotend toolhead board that replaces the complex multi-wire harness between your printer's mainboard and extruder. Using CAN bus or USB communication, it consolidates hotend heater control, fan control, thermistor input, and stepper driving into one compact board mounted directly at the toolhead.
Q: What is the difference between the THR36 and the THR42?
A: The THR36 is designed for use with NEMA 14 (36 mm) stepper motors, while the THR42 is sized for NEMA 17 (42 mm) stepper motors. Both share the same RP2040 MCU, TMC2209 driver, and feature set — only the physical mounting dimensions differ to match their respective motor form factors.
Q: Is this board compatible with Klipper firmware?
A: Yes. The MKS THR36/THR42 is specifically designed for Klipper. The onboard RP2040 MCU runs Klipper firmware, and the integrated ADXL345 accelerometer enables Klipper's input shaping / resonance compensation feature without any additional hardware.
Q: Does the board support CAN bus communication?
A: Yes. The board includes an integrated CAN transceiver and a built-in 120 Ω termination resistor, making it straightforward to set up CAN bus communication with an MKS or compatible mainboard — reducing wiring complexity significantly.
Production & Packaging Notice
To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.