1. Introduction
The Duka ATuMan EP2 Lithium Electric Grinder is a versatile, portable tool designed for a variety of precision tasks including polishing, cutting, carving, and repair work. Its compact size, cordless operation, and adjustable speed settings make it ideal for detailed craftsmanship and hobby projects. This manual provides essential information for safe and effective use of your EP2 grinder.
2. Safety Instructions
Always observe basic safety precautions to reduce the risk of injury or damage when using electric tools. Read all instructions carefully before operation.
- Eye Protection: Always wear safety glasses or goggles to protect your eyes from flying debris.
- Work Area: Keep your work area clean, well-lit, and free from clutter. Ensure adequate ventilation.
- Secure Workpiece: Always secure the workpiece firmly to prevent movement during operation.
- Proper Accessories: Use only accessories designed for this tool and suitable for the task. Ensure they are correctly installed.
- Avoid Overloading: Do not force the tool. Let the tool do the work at its intended speed.
- Battery Safety: Do not expose the battery to extreme temperatures or disassemble it. Use only the specified charging method.
- Storage: Store the tool and accessories in a dry, secure place out of reach of children.
- Not for Heavy-Duty Use: This product is recommended for desktop hand use and is not suitable for large-scale industrial applications such as mold electric grinding, extensive wood carving, root carving, or relief work.
Figure 1: Multiple intelligent protection features including short circuit, charging/discharging, overheat, and overcurrent protection.
3. Package Contents
Your Duka ATuMan EP2 Lithium Electric Grinder package includes the following items:
Figure 2: The Duka ATuMan EP2 Grinder and its comprehensive accessory kit.
Accessories Included:
- Chucks: 2.35mm (x1), 3.17mm (x1)
- Drill Bits: 3.17mm (x2)
- Sanding Rings: (x4)
- Sanding Ring Tension Wheel: (x1)
- Diamond Grinding Heads (3mm): Cylindrical (x1), Conical (x1), Spherical (x1), Positive Trapezoidal (x1)
- Red Corundum Grinding Heads (3mm): Cylindrical (x1), Conical (x1)
- Red Corundum Grinding Heads (6mm): Spherical (x1), T-shaped (x1)
- Red Corundum Grinding Head (8mm): Positive Trapezoidal (x1)
- Polishing Wheels: Wool Wheels (x7), Wool Wheel Mandrel (x1)
- Cutting Discs: Diamond Cutting Disc (x1), Stainless Steel Saw Blade (x1), Other Cutting Discs (x4), Saw Blade Connecting Rods (x2)
- Wrench: Slotted Screwdriver Wrench (x1)
- Brushes: Diamond Brush, Nylon Brush
Figure 3: A selection of the 42 rich accessories provided for diverse applications.
4. Product Overview
The Duka ATuMan EP2 features a rugged aviation aluminum body for comfortable grip and durability. It incorporates a high-precision rotary bearing system for stable operation.
Figure 4: Side view of the Duka ATuMan EP2 Grinder.
Components:
Figure 5: Internal components of the grinder head.
- Collet Sleeve: Secures the collet core.
- Metal Collet Core: Holds the accessory bit.
- Metal Spindle: Drives the accessory bit.
- Spindle Lock Key: Used to lock the spindle for easy accessory changes.
- Power Button: Turns the device on/off.
- Speed Adjustment Dial: Located at the base, numbered 1-5 for speed selection.
5. Setup
Charging the Device:
Before first use, fully charge the grinder. Connect the charging cable to the device and a suitable USB power source. The charging indicator will show the charging status. A full charge takes approximately 1 hour and 10 minutes.
Attaching Accessories:
- Ensure the grinder is turned off.
- Press and hold the Spindle Lock Key to prevent the spindle from rotating.
- Unscrew the Collet Sleeve.
- Insert the desired accessory bit into the Metal Collet Core.
- Screw the Collet Sleeve back on and tighten it firmly while still holding the Spindle Lock Key. Release the key once the accessory is secure.
- Verify the accessory is securely fastened before operation.
Figure 6: Diagram illustrating the components for attaching accessories.
6. Operating Instructions
Power On/Off:
Press the power button located on the body of the grinder to turn it on or off.
Speed Adjustment:
The grinder features a five-speed adjustment system. Rotate the dial at the base of the tool to select the desired speed setting (1-5). The visual speed light prompt will indicate the current setting.
- Speed I: 10,000 r/min
- Speed II: 14,000 r/min
- Speed III: 18,000 r/min
- Speed IV: 22,000 r/min
- Speed V: 28,000 r/min (Maximum Speed)
Figure 7: Speed settings and their corresponding RPMs.
Applications:
- Polishing: Use wool felt or wool wheels for polishing wood, plastic, ceramic, metal, and jade.
- Cutting: Attach cutting blades for precise cuts on various materials.
- Carving/Engraving: Utilize spherical milling cutter grinding heads for detailed work on wood, plastic, and other materials.
- Drilling: Use high-speed steel drill bits for drilling into wood, plastic, and similar materials.
- Rust/Burr Removal: Diamond or nylon brushes are effective for cleaning and removing rust or burrs from metal.
Figure 8: Polishing a walnut with the EP2 Grinder.
Figure 9: Engraving leather with the EP2 Grinder.
Figure 10: Drilling into timber with the EP2 Grinder.
Figure 11: Removing rust from metal using the EP2 Grinder.
Figure 12: Carving jade with the EP2 Grinder.
7. Maintenance
- Cleaning: After each use, disconnect the tool from any power source and clean the exterior with a soft, dry cloth. Remove any dust or debris from the ventilation slots.
- Accessory Care: Clean accessories after use and store them properly to maintain their sharpness and effectiveness.
- Battery Care: For optimal battery life, avoid fully discharging the battery frequently. Store the tool with a partial charge if not used for extended periods.
- Storage: Store the grinder and its accessories in a cool, dry place, away from direct sunlight and moisture.
Figure 13: Efficient heat dissipation design for prolonged motor life.
8. Troubleshooting
- Tool Not Turning On: Ensure the battery is charged. If the battery is charged, check the power button for proper function.
- Reduced Performance/Power: The battery may be low. Recharge the device. If the issue persists, the accessory might be dull or improperly installed.
- Excessive Vibration: Ensure the accessory is correctly and securely installed. Check if the accessory is bent or damaged; replace if necessary.
- Overheating: If the tool feels excessively hot, stop operation immediately and allow it to cool down. Ensure ventilation slots are clear. Avoid continuous heavy-duty use.
Figure 14: High concentricity ensures stable grinding without deviation.
9. Specifications
Figure 15: Product dimensions.
| Feature | Specification |
|---|---|
| Model Name | EP2 Lithium Electric Grinder |
| Dimensions | L207 × φ37mm |
| Net Weight | Approx. 260g |
| Body Material | Aluminum Alloy, Plastic |
| Speed Settings | 5 Gears (10,000 - 28,000 r/min) |
| Motor Voltage | 7.2V |
| Battery Capacity | 1100mAh |
| Charging Time | Approx. 1 hour 10 minutes |
| No-load Endurance | Up to 50 minutes |
| Power Source | DC |
| Certification | None |
10. User Tips
- Start Slow: Begin with lower speed settings for delicate work or when you are new to a material, gradually increasing as needed.
- Light Pressure: Let the tool's speed and the accessory do the work. Applying excessive pressure can reduce efficiency, damage the workpiece, or cause the tool to overheat.
- Practice on Scraps: Before working on your final project, practice on scrap materials to get a feel for the tool and the chosen accessory.
- Keep Accessories Clean: Regularly clean grinding and polishing heads to maintain their effectiveness and prevent material buildup.
- Battery Management: For longer projects, consider having the charger nearby or taking short breaks to allow the battery to recover slightly.
11. Warranty and Support
For warranty information, technical support, or service inquiries, please refer to the seller's policies or contact the point of purchase. Keep your purchase receipt as proof of purchase.
