The Rockler Compact Router Ellipse/Circle Jig is a versatile woodworking accessory designed to enhance the capabilities of compact plunge routers. Its primary function is to enable users to cut precise ellipses and circles, making it an invaluable tool for a wide range of projects such as picture frames, mirrors, signs, and other decorative or functional items requiring curved edges. The jig is engineered to work with various compact plunge routers, including models from Bosch, Porter Cable, and DeWalt, offering broad compatibility for woodworkers.
Function Description
The core function of the Compact Router Ellipse/Circle Jig is to guide a compact plunge router along a predetermined elliptical or circular path. This is achieved through a clever mechanical design that utilizes a jig arm and a jig base. For cutting ellipses, the jig employs two "dovetail keys" that slide within channels on the jig base. These keys act as pivot points for the jig arm, which holds the router. By adjusting the positions of these pivot points along the major and minor axes, the user can control the dimensions and eccentricity of the ellipse. The router bit, attached to the jig arm, then traces the desired elliptical path as the arm is rotated.
When routing circles, the setup is simplified. One of the dovetail keys is removed, and the remaining key is secured in a central position on the jig base. This single pivot point allows the jig arm to rotate in a perfect circle, with the radius determined by the distance of the router bit from the pivot. This adaptability makes the jig suitable for both complex elliptical cuts and simpler circular cuts, providing flexibility for different project requirements.
The jig is designed for precision, ensuring that the cuts are smooth and accurate. It allows for incremental depth adjustments, which is crucial for safe and effective routing. Instead of attempting a full-depth cut in one pass, users are instructed to make several shallow passes, gradually increasing the depth. This approach not only enhances safety by reducing strain on the router and bit but also results in cleaner cuts and better control over the material.
Usage Features
The Compact Router Ellipse/Circle Jig is designed with several features to facilitate ease of use and precision.
- Router Mounting: The jig arm is equipped with pre-drilled holes to accommodate various compact plunge routers. A "Router Mounting Hole Key" is provided to help users identify the correct mounting points for Bosch Colt PR20EVS Kits, Porter Cable 450PK, and DeWalt DWP611PK. This ensures a secure and stable attachment of the router to the jig arm.
- Jig Base and Workpiece Setup: The jig base features scribe lines that assist in centering it on the workpiece, aligning with the major and minor axes of the intended cut. The base is then secured to the workpiece using wood screws, providing a stable foundation for the routing operation. For through cuts, the workpiece must be elevated and secured to a sacrificial board, preventing damage to the underlying surface and ensuring stability during the cut.
- Ellipse Routing Adjustment: To set up for an ellipse, the user marks a center point and the major and minor axes on the workpiece. The jig base is centered on this intersection. Two dovetail keys are inserted into the jig base channels, acting as pivot points. The jig arm, with the router attached, is then positioned onto these pivot pins. By rotating the jig arm and adjusting the positions of the locking pivots along the major and minor axes, the desired ellipse dimensions are achieved. The instructions emphasize the importance of verifying the ellipse pattern and smooth movement of the dovetail keys before making the actual cut.
- Circle Routing Adjustment: For circles, the setup is simpler. After marking the center point on the workpiece and securing the jig base, one dovetail key and one locking pivot are removed. The remaining dovetail key is secured in a central position on the jig base using wood screws. The jig arm is then mounted onto this single pivot. The radius of the circle is set by adjusting the distance of the router bit from the pivot point.
- Incremental Cutting: A key operational feature is the recommendation to make multiple shallow passes rather than a single deep cut. This practice is vital for safety, preventing kickback, reducing wear on the router bit, and achieving a smoother, more precise finish.
- Visibility and Control: The design of the jig allows for good visibility of the router bit and the cutting path, enabling the user to maintain awareness and control throughout the operation.
Maintenance Features
While the manual does not explicitly detail maintenance features for the jig itself, general woodworking tool maintenance principles apply to ensure its longevity and optimal performance.
- Cleanliness: After each use, the jig should be cleaned to remove sawdust, wood chips, and any residue. This prevents buildup that could impede the smooth movement of the dovetail keys or affect the precision of the pivot points.
- Storage: Proper storage is essential to protect the jig from damage and environmental factors. Storing it in a dry, clean environment will prevent rust on metal components and preserve the integrity of the jig arm and base.
- Hardware Inspection: Regularly inspect all screws, knobs, T-bolts, and washers for tightness and wear. Loose hardware can compromise the stability and accuracy of the jig. Replace any worn or damaged components promptly.
- Dovetail Key Movement: Ensure that the dovetail keys move smoothly within their channels. If movement becomes stiff, a light application of a dry lubricant (such as a silicone spray or graphite powder) might be beneficial, though care should be taken not to attract dust.
- Router Bit Maintenance: Although not directly part of the jig, the router bit is integral to its operation. Keeping router bits sharp and clean is crucial for effective cutting and to prevent excessive strain on the router and the jig. Dull bits can lead to poor cut quality, increased heat, and potential safety hazards.
- Adherence to Safety Warnings: Maintaining the jig also involves adhering to all safety warnings, such as unplugging the router before making adjustments. This practice prevents accidental starts and ensures the safety of the user and the equipment.
By following these usage and maintenance guidelines, users can ensure that their Rockler Compact Router Ellipse/Circle Jig remains a reliable and effective tool for their woodworking projects, consistently delivering precise and high-quality results.
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