LDO StealthChanger Kit for Voron 2.4 – Modular Automatic Tool Changer System

A Modular Tool-Changing Ecosystem for Voron 2.4

The LDO StealthChanger is a fully modular tool-changing system designed for the Voron 2.4 platform. Originally developed by DraftShift and industrially optimized by LDO, it turns a standard Voron into a scalable, multi-tool automation workhorse.

Core Goals:

• Enable fully automated tool changing
• Maintains Voron’s high-speed performance
• Deliver precise mechanical alignment with magnetic + pin locking
• Support scalable multi-too setups for 300mm and 350mm builds

The system is built around three key modules:

① Base Kit — Core Mechanism

Forms the foundation of the tool-changing system.

② Tool & Dock Kit — Tool Expansion Units

Defines each individual toolhead and its docking station.

③ Top Hat & Door Buffer Kit — Structural Expansion

Enhances enclosure compatibility, rigidity, and vertical space.

With all three modules, the Voron 2.4 becomes a capable multi‑tool automation platform.

Supported Printers

• Voron 2.4 (300mm)
• Voron 2.4 (350mm)

Tool Capacity

• 300mm build: up to ~5 tools
• 350mm build: up to ~6 tools

Supported Toolhead Ecosystem

• StealthBurner
• DragonBurner
• RapidBurner
• Yavoth
• XOL
• Archetype series

System Requirements

• CAN Bus setup is strongly recommended
• Multi-tool wiring management (USB hub / breakout boards)
• Front dock reduces available Y/Z build space

StealthChanger Docs:
https://docs.ldomotors.com/en/StealthChanger

GitHub:
https://github.com/DraftShift

Simplified Setup Workflow:

1. Install Base Kit (Shuttle + Probe)

2. Install Tool & Dock Kits (one per tool)

3. Install Top Hat / Door Buffer (structural upgrade)

4. Configure toolchanger.cfg in Klipper

5. Calibrate tool offsets and docking paths

6. Initialize CAN Bus / toolboards

Base Kit

• CNC Shuttle ×1
• Backplate system ×1 set
• NH-Hexa USB hub ×1
• Sexball probe ×1
• Full fastener set

Tool & Dock Kit (Per Tool)

• Toolboard (Nitehawk-36)
• Dock structure
• OptoTap PCB
• Fans (2510 + 4010 blower)
• Springs, pins, magnets
• Wiring and hardware kit

Top Hat & Door Buffer Kit

• Aluminum extrusions (Top Hat)
• Polycarbonate panels
• Door buffer crossbeam
• Mounting brackets
• Full hardware pack

What the Community Is Saying

✔ Noticeably higher machining precision compared to typical DIY builds

✔ Tight shuttle pin fit reduces play and improves stability

✔ Flexible tool expansion for multi-material or multi-process workflows

⚠ Front dock reduces usable build space (requires planning)

FAQ

Q1: Do I need all three kits?
Yes, here's how it works:

• Base Kit (required)
• Tool &Dock Kit (one per tool)
• Top Hat & Door Buffer Kit (optional, based on 300mm or 350mm setup)

Q2: Can I start with just the Base Kit?
Yes, but the system won’t be able to print until you add at least one Tool & Dock Kit.

Q3: Is it compatible with standard StealthBurner?
Yes, with a compatible backplate adapter.

Q4: What’s the difference between 300mm and 350mm builds?

• 350mm: supports more tools (up to ~6)
• 300m: more compact (up to ~5 tools)

Q5: Does it reduce build volume?
Yes. The front dock reduces Y-axis space by roughly 20mm.

Q6: Is CAN Bus required?
Strongly recommended. Without it, wiring becomes significantly more complex.