The Sapphire Pro uses a belt routing system where both motors dictate X and Y movement together. Choosing "Cartesian" by mistake will cause the print head to move diagonally or jam. 2. Stepper Driver Current and Direction
Download or compile the firmware binary file (it must be named exactly robin_nano35.bin or Robin_nano.bin depending on your board version).
Every time you want to change a setting (like changing a step-per-mm value or adding a BLTouch), you must recompile the code in VS Code/PlatformIO and re-flash the board. Comparison: Klipper vs. Marlin on the Sapphire Pro Klipper Firmware Marlin 2.x Firmware Max Print Speed Ultra-High (150+ mm/s) Moderate-High (80-100 mm/s) Tuning Difficulty Easy (Text file edits) Hard (Requires recompilation) Required Hardware Robin Nano + Raspberry Pi Robin Nano only Vibration Control Yes (Input Shaping) Interface Wi-Fi Web Browser Local Touchscreen How to Install the Firmware Method 1: Installing Marlin
It’s a highly optimized version of Marlin specifically pre-configured for the Sapphire Pro’s unique dimensions and the MKS Robin Nano board. It often includes better UI elements and more stable thermal protections than the factory firmware. Pros: Specifically tuned for this exact printer; reliable. two trees sapphire pro firmware best
RepRapFirmware is less common on the Sapphire Pro but has a dedicated following. It is traditionally used on high-end Duet boards, but can be run on the stock MKS Robin Nano via community ports (like Fly-RRF). Key Features
You’ll likely need to compile the firmware yourself using VS Code and Auto Build Marlin to ensure the pin mappings for the MKS Robin Nano board are correct.
For users who switch between CNC milling and laser engraving, a is the gold standard. The Sapphire Pro uses a belt routing system
Flashing firmware on the Sapphire Pro is straightforward because of its bootloader:
Klipper offloads the heavy processing to a secondary computer (like a Raspberry Pi or BigTreeTech CB1). This allows for features like Input Shaper (which eliminates ghosting at high speeds) and Pressure Advance (which perfects corners and retractions).
This guide will explore the two main upgrades available: and Klipper . We'll break down what makes each one special, help you decide which is right for you, and provide a clear path to get started. Stepper Driver Current and Direction Download or compile
To help you get started with your upgrade, please let me know:
Example: PID autotune on Marlin