An edge finder and a center finder are both tools used in machining to locate specific points on a workpiece, but they serve different purposes and operate differently. An edge finder is used to locate the edge of a workpiece. It typically consists of a shank and a rotating tip. When the tool is spun in a machine spindle and brought into contact with the workpiece, the tip will visibly offset or "kick" when it touches the edge. This indicates the precise location of the workpiece's edge, allowing the machinist to set accurate zero points for further machining operations. Edge finders are crucial for establishing reference points and ensuring precision in machining tasks. A center finder, on the other hand, is used to locate the center of a hole or a cylindrical workpiece. It often consists of a conical tip that fits into the hole or a dial indicator setup that helps find the center by measuring equal distances from the edges. Center finders are essential for operations that require precise centering, such as drilling or boring, ensuring that the tool is aligned with the center axis of the workpiece. In summary, the primary difference lies in their function: edge finders are for locating edges, while center finders are for locating centers. Both tools are vital for precision in machining, but they are applied in different contexts depending on the specific requirements of the task at hand.

To use a wiggler set on a milling machine, follow these steps: 1. **Select the Appropriate Wiggler Tip**: Choose the correct tip for your task. A pointed tip is used for scribing lines, a ball tip for centering, and a disc tip for edge finding. 2. **Install the Wiggler**: Insert the wiggler shank into the milling machine's collet or chuck and secure it tightly. 3. **Align the Wiggler**: Manually adjust the wiggler so that the tip is close to the workpiece surface. Ensure the machine spindle is off during this setup. 4. **Start the Machine**: Turn on the milling machine at a low speed. The wiggler will begin to rotate, and the tip will appear to wobble. 5. **Center the Wiggler**: Gently adjust the machine's table or the workpiece until the wiggler tip runs true, with minimal wobble. This indicates that the tip is aligned with the spindle axis. 6. **Edge Finding**: For edge finding, move the workpiece towards the rotating wiggler tip. When the tip makes contact, it will suddenly deflect, indicating the edge position. Note the machine's readout or dial at this point. 7. **Zero the Machine**: Once the edge is found, zero the machine's digital readout or note the dial reading to establish a reference point for further machining operations. 8. **Repeat as Necessary**: If multiple edges or points need to be located, repeat the process for each. 9. **Turn Off the Machine**: Once the wiggler is no longer needed, turn off the machine and remove the wiggler from the spindle. This process ensures precise alignment and positioning of the workpiece for accurate milling operations.

An electronic edge finder offers several advantages in precision machining and CNC operations: 1. **Accuracy**: Electronic edge finders provide high precision in locating the edges of a workpiece, often within a few microns. This accuracy is crucial for ensuring the quality and consistency of machined parts. 2. **Speed**: They allow for faster setup times compared to traditional mechanical edge finders. The electronic signal provides immediate feedback, reducing the time needed to locate edges. 3. **Ease of Use**: Electronic edge finders are user-friendly, often requiring minimal training. The digital readout or signal makes it easy to determine when the edge is located. 4. **Versatility**: They can be used on various materials, including metals, plastics, and composites, without the risk of damaging the workpiece or the tool. 5. **Non-contact Operation**: Many electronic edge finders operate without physical contact, reducing wear and tear on both the tool and the workpiece. This feature is particularly beneficial for delicate or soft materials. 6. **Repeatability**: The consistent electronic signal ensures repeatable results, which is essential for batch production and maintaining tight tolerances. 7. **Integration with CNC Systems**: Electronic edge finders can be easily integrated with CNC machines, allowing for automated processes and reducing the potential for human error. 8. **Enhanced Safety**: The non-contact nature and quick response reduce the risk of accidents or damage during the setup process. 9. **Cost-effectiveness**: While the initial investment may be higher, the reduction in setup time and increased accuracy can lead to cost savings in the long run. 10. **Feedback Mechanism**: Many electronic edge finders provide visual or auditory signals, making it easier for operators to confirm edge detection without constant visual monitoring.

1. **Select the Right Edge Finder**: Choose an edge finder suitable for your machine and the material you are working with. Common types include mechanical, electronic, and optical edge finders. 2. **Install the Edge Finder**: Securely mount the edge finder in the machine spindle or chuck. Ensure it is properly aligned and tightened to prevent any wobble during operation. 3. **Set Spindle Speed**: Adjust the spindle speed according to the edge finder type. Mechanical edge finders typically operate at 500-1000 RPM, while electronic and optical types may have different requirements. 4. **Zero the Machine**: Before calibration, zero the machine's digital readout (DRO) or manual scales to ensure accurate reference points. 5. **Engage the Edge Finder**: Slowly move the machine table or spindle towards the workpiece until the edge finder makes contact. For mechanical edge finders, the tip will visibly offset or "kick" when it touches the edge. 6. **Record the Reading**: Note the machine's DRO or scale reading at the point of contact. This reading represents the edge of the workpiece. 7. **Calculate the Offset**: Determine the edge finder's radius or offset value. For mechanical edge finders, this is typically half the diameter of the tip. Subtract this value from the recorded reading to find the true edge position. 8. **Adjust Machine Settings**: Input the calculated offset into the machine's DRO or manually adjust the scales to reflect the true edge position. 9. **Verify Calibration**: Perform a test cut or measurement to ensure the calibration is accurate. Adjust as necessary. 10. **Regular Maintenance**: Periodically check and recalibrate the edge finder to maintain accuracy, especially after any machine adjustments or tool changes.

Yes, a wiggler set can be used on a CNC machine. A wiggler, also known as a center finder or edge finder, is a tool used to accurately locate the edges, center points, or surface features of a workpiece. In CNC machining, precise positioning is crucial for ensuring that the machine performs operations accurately according to the programmed instructions. When using a wiggler on a CNC machine, the tool is typically mounted in the spindle. The machine is then manually jogged or moved to bring the wiggler into contact with the workpiece. As the spindle rotates, the wiggler's tip will deflect when it touches the edge or center of the workpiece. The operator observes this deflection to determine the exact position of the workpiece relative to the machine's coordinate system. Using a wiggler set on a CNC machine can be beneficial for several reasons: 1. **Accuracy**: Wigglers provide a high level of precision, which is essential for tasks that require exact alignment and positioning. 2. **Versatility**: A wiggler set typically includes different tips, such as ball, needle, and disc, allowing for various applications like edge finding, centering, and scribing. 3. **Cost-Effectiveness**: Wigglers are relatively inexpensive compared to other precision measuring tools, making them an economical choice for many machining operations. 4. **Ease of Use**: Wigglers are simple to use and do not require complex setup or calibration, making them accessible for operators with varying levels of experience. In summary, while CNC machines are often equipped with advanced probing systems, a wiggler set remains a valuable tool for manual setup and verification tasks, providing a reliable method for ensuring accurate machining operations.