LifeTrac v25
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AI Generated LifeTrac 2025
Machine Design
LifeTrac v25 is a remotely-operated compact utility loader designed as an open-source alternative sized between a Toro Dingo and a Bobcat. Built using parametric OpenSCAD design, it features modular construction following Open Source Ecology principles.
Key Design Features
- Modular Construction: Plate steel, square tubing, and angle iron components for easy fabrication and repair
- Remote Operation: No operator seat required, optional standing deck for manual operation
- Hydraulic Power: 4 independent wheel motors for all-wheel drive, 2 cylinders for arm lift, 2 for bucket tilt
- Open Source CAD: Complete OpenSCAD parametric design files for customization and manufacturing
Technical Specifications
| Specification | Value (mm) | Value (inches) | Value (meters) |
|---|---|---|---|
| Overall Width | 1,200 mm | 47.2" | 1.20 m |
| Overall Length | 1,800 mm | 70.9" | 1.80 m |
| Height to Frame Top | 1,000 mm | 39.4" | 1.00 m |
| Ground Clearance | 150 mm | 5.9" | 0.15 m |
| Wheel Diameter | 500 mm | 19.7" | 0.50 m |
Performance Specifications
| Specification | Value |
|---|---|
| Hydraulic System Pressure | 3,000 PSI |
| Estimated Lift Capacity | ~1,200 kg (~2,646 lbs) |
| Drive Configuration | All-wheel drive (4 hydraulic motors) |
| Cylinder Bore (Lift) | 63.5 mm (2.5") |
Weight Estimate
Machine weight is estimated at 800-1,000 kg (1,760-2,200 lbs) based on steel construction with:
- 1/4" (6.35mm) plate steel for most components
- 1/2" (12.7mm) plate steel for high-stress areas
- 4"×4"×1/4" square tubing for main frame
- 3"×3"×1/4" square tubing for loader arms
Features
- Multiple Control Modes: Switch for MQTT/OFF/BLE mode selection (BLE default)
- BLE Direct Control: Direct Bluetooth connection to DroidPad app (no WiFi/broker needed)
- Remote Joystick Control: Dual joystick setup for tank steering and hydraulic functions
- DroidPad Compatible: Native support for DroidPad via BLE or MQTT
- WiFi Communication: Reliable wireless control with MQTT protocol
- ROS2 Integration: Control LifeTrac from BeagleBone or any ROS2-enabled device
- Configurable Flow Control: Choose between single or dual proportional flow valves via jumper
- Proportional Flow Control: Speed regulation based on joystick input intensity
- Safety Features: Emergency stop, communication timeout, and fail-safe operation
- Status Monitoring: Real-time system status and diagnostics
Control Scheme
Tank Steering
- Left Joystick Y-axis: Forward/backward movement for both tracks
- Left Joystick X-axis: Differential steering (left/right turns)
Hydraulic Functions
- Right Joystick Y-axis: Arms up/down control
- Right Joystick X-axis: Bucket up/down control
Speed Control
- Proportional Flow Valve: Automatically adjusts system speed based on maximum joystick input
- Deadzone: 10% deadzone prevents unwanted movements from joystick drift
GitHub Repository
For complete documentation, source code, and detailed specifications, visit the LifeTrac v25 GitHub Repository.
The repository includes:
- Mechanical design files (OpenSCAD)
- Arduino controller code
- Remote control software
- Web controller interface
- ROS2 integration packages
- Complete wiring and installation guides