Mellow FLY 32-Bit ARM 9-Motor 3D Printer Board | TMC2209

Mellow FLY 32-Bit ARM 9-Motor Drive 3D Printer Motherboard

Take your 3D printing to the next level with the Mellow FLY 32-Bit ARM Motherboard — a powerhouse control board designed for advanced printers including Voron builds. Powered by the STM32F407ZGT6 chip running a 32-bit ARM Cortex-M4 core at 168 MHz, this board delivers lightning-fast processing for smooth, precise motion control. With support for 9 independent motor drives and 6 extruders, it's built for complex, multi-axis printer configurations right out of the box.

Compatible with both Marlin 2.0 and Klipper firmware, this board gives you the flexibility to choose your preferred workflow. Whether you're running a CoreXY, Kossel, Ultimaker, or standard XYZ printer, this motherboard has you covered.

Made in Mainland China.

Key Features

• 32-Bit ARM Cortex-M4 @ 168 MHz — STM32F407ZGT6 chip for high-speed, precise control
• 9 Independent Motor Drive Interfaces — X, Y, Z, E0–E5 for complex multi-motor setups
• 6 Extruder Support — ideal for multi-material and multi-tool-head printers
• Compatible Drivers — A4988, LV8729, DRV8825, TMC2208, TMC2209, and more
• Drive Mode Support — UART / SPI for TMC drivers
• FPC Expansion Socket — reserve socket for up to 3 additional stepper motors
• 6 Controllable + 3 Fixed Fan Sockets — full fan management for hotends and enclosures
• Multiple Display Options — serial touch screen, 12864 LCD, and 2004 LCD supported
• Auto Bed Leveling — BLTouch sensor compatible
• Dual & Triple Z-Axis Support — dedicated Z3 limit switch interface for gantry leveling
• Printer Structures Supported — XYZ, Kossel, Ultimaker, CoreXY, and more
• Input Voltage — DC 12V–DC 24V
• Temperature Sensors — 7× NTC 100K thermistor interfaces (B, T0–T6) + 1× SPI thermocouple (MAX6675)
• Optional Limit Switch Power — selectable 5V / 12V / 24V
• Servo & Filament Detection — one servo interface + one material runout sensor interface
• Tool-Free Heater Connections — push-type screw-free terminals for fast, secure wiring

Technical Specifications

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Frequently Asked Questions

Q: Is the Mellow FLY motherboard compatible with Klipper firmware?

A: Yes! The Mellow FLY 32-bit ARM motherboard supports both Marlin 2.0 and Klipper firmware, giving you full flexibility to use your preferred control system for your Voron or other 3D printer build.

Q: How many stepper motors can this 3D printer motherboard support?

A: The board natively supports 9 independent motor drive interfaces (X, Y, Z, E0–E5). Additionally, the onboard FPC expansion socket can add up to 3 more stepper motor drivers, bringing the total potential to 12 motors.

Q: What stepper motor drivers are compatible with this board?

A: The Mellow FLY motherboard is compatible with a wide range of drivers including A4988, LV8729, DRV8825, TMC2208, and TMC2209. TMC drivers are supported in both UART and SPI modes for silent and precise operation.

Q: Can this motherboard support dual or triple Z-axis configurations?

A: Yes. The board includes a dedicated Z3 limit switch interface, making it fully compatible with dual Z-axis and triple Z-axis printer setups for automatic gantry leveling and alignment.

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.