1. Introduction
This manual provides detailed instructions for the proper use, setup, and maintenance of your STAEDTLER 660 20 Mars Drafting Head. Designed for precision and ease of use, this drafting head is an essential tool for technical drawing on A3 and A4 drawing boards. Please read this manual thoroughly before initial use to ensure optimal performance and longevity of your product.
2. Product Overview and Features
The STAEDTLER 660 20 Mars Drafting Head is engineered to enhance accuracy and efficiency in drafting tasks. Its robust design and intuitive controls make it suitable for various technical drawing applications.
Figure 2.1: The STAEDTLER 660 20 Mars Drafting Head, showing its transparent ruler arms and central angle adjustment mechanism.
Key Features:
- Compatibility: Specifically designed for use with A3 and A4 drawing boards.
- Angle Range: Adjustable angle range from 0 to 90 degrees for versatile drawing.
- Stop-and-Go Push-Button: Facilitates easy setting of desired angles and allows for freewheeling movement.
- Transparent Ruler Arms: Equipped with double-sided, opposite-running scales for precise measurements and clear visibility of the drawing surface.
- Ergonomic Design: Can be operated conveniently with one hand.
Figure 2.2: Product packaging for the STAEDTLER 660 20 Mars Drafting Head, indicating model number and brand.
3. Setup
Before using the drafting head, ensure your drawing board is clean and stable. The drafting head is designed to integrate with compatible STAEDTLER drawing boards (e.g., Mars 661 series).
- Unpacking: Carefully remove the drafting head from its packaging. Inspect for any visible damage.
- Attachment to Drawing Board: The drafting head is designed to slide onto the main ruler or guide rail of your A3 or A4 drawing board. Align the groove on the drafting head with the rail on your drawing board.
- Secure Positioning: Gently slide the drafting head onto the rail until it is securely seated. It should move smoothly along the rail without excessive play.
4. Operating Instructions
The STAEDTLER 660 20 Mars Drafting Head offers precise control for drawing lines at various angles.
Figure 4.1: The drafting head positioned to form a 90-degree angle, demonstrating its functionality for perpendicular lines.
- Adjusting the Angle:
- Locate the central push-button mechanism on the drafting head.
- Press and hold the Stop-and-Go push-button to release the locking mechanism.
- Rotate the transparent ruler arms to the desired angle, indicated on the protractor scale. The angle range is 0-90 degrees.
- Release the push-button to lock the arms at the selected angle. Ensure it clicks into place for stability.
Figure 4.2: Detailed view of the angle scale and markings, including common angles like 15, 30, 45, 60, 75, and 90 degrees.
- Freewheeling Mode: To move the ruler arms freely without locking into specific angles, keep the Stop-and-Go push-button depressed. This allows for continuous angle adjustment.
- Using the Ruler Arms: The transparent ruler arms feature double-sided, opposite-running scales. Position the desired scale against your drawing surface for accurate measurement and line drawing.
- One-Hand Operation: The design allows for convenient adjustment and operation using a single hand, freeing the other hand for drawing or holding materials.
Figure 4.3: A hand demonstrating the use of the central push-button for angle adjustment.
- Precision Markings: The drafting head includes specific markings for common angles such as 7° and 42° for dimetric and isometric projections, respectively.
5. Maintenance
Proper care ensures the longevity and accuracy of your drafting head.
- Cleaning: Wipe the drafting head with a soft, damp cloth. Avoid abrasive cleaners or solvents, as these can damage the plastic and markings.
- Storage: Store the drafting head in a clean, dry place, away from direct sunlight and extreme temperatures.
- Inspection: Periodically check the ruler arms and locking mechanism for any signs of wear or damage.
6. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Drafting head does not slide smoothly on the board. | Dust or debris on the drawing board rail; rail or drafting head mechanism is dirty. | Clean the drawing board rail and the drafting head's sliding mechanism with a soft, dry cloth. Ensure no particles obstruct movement. |
| Angle adjustment is stiff or does not lock securely. | Dust or debris in the locking mechanism; mechanism wear. | Gently clean the push-button and surrounding area. If the issue persists, contact customer support. |
| Ruler markings are fading or unclear. | Exposure to harsh chemicals or excessive friction. | Avoid using abrasive cleaners. This is typically not repairable; consider replacement if accuracy is compromised. |
7. Specifications
| Attribute | Detail |
|---|---|
| Model Number | 660 20 |
| Brand | STAEDTLER |
| Compatibility | A3 and A4 Drawing Boards |
| Angle Range | 0-90 degrees |
| Material Type | Plastic |
| Color | Transparent |
| Item Weight | 8.1 ounces (approx. 230 grams) |
| Product Dimensions | 9.37 x 1.5 x 12.13 inches (approx. 23.8 x 3.8 x 30.8 cm) |
8. Warranty and Support
STAEDTLER products are manufactured to high-quality standards. For specific warranty information, please refer to the documentation included with your purchase or visit the official STAEDTLER website.
For technical assistance, replacement parts, or further inquiries, please contact STAEDTLER customer support through their official channels. Contact information can typically be found on the product packaging or the STAEDTLER website.
