NC servo feeders, driven by precise servo motors and equipped with cutting-edge technology, have revolutionized the stamping industry. These innovative feeders, which rely on synchronous belt wheel transmission for material feeding, have set new standards for precision. With typical accuracy levels reaching an impressive ±0.02mm, they have become the preferred choice for manufacturers seeking unmatched feeding precision. In addition to their precision, NC servo feeders have seamlessly integrated automation into their operations, making them indispensable in the stamping industry. This article explores the exceptional features of NC servo feeders while addressing the most common issue they face: unstable feed pitch.

1. Adjusting Feed Speed

One prevalent cause of unstable feed pitch in NC servo feeders is the excessive speed setting. These feeders, although highly efficient, have their limitations in terms of response time. Pneumatic NC servo feeders typically operate at speeds ranging from 60 to 120 strokes per minute, depending on material thickness and feed pitch, while mechanical NC servo feeders can reach speeds of 150 to 200 strokes per minute. Exceeding these speed limits can lead to misfeeds. Thus, it is crucial to ensure that the stamping speed aligns with the feeder’s capabilities.

2. Maintaining Proper Air Supply Pressure

A stable air supply pressure is vital for the reliable performance of NC servo feeders. To achieve consistent relaxation, these feeders require a steady air supply with an optimal pressure of 4.5kg/cm2, as indicated by the three-point combination pressure gauge. Regularly inspect the gauge for any damage and adjust the compressor pressure accordingly to maintain the ideal air supply.

3. Correcting Feeding Height

The feeding height of the NC servo feeder plays a pivotal role in maintaining feed pitch stability. As stamping often involves various molds with different heights, adjusting the feeder’s height accordingly is essential. Incorrect adjustments can result in misalignment and irregular feeding. Align the feeder’s height both horizontally and vertically with the mold when changing molds to ensure accurate feeding.

4. Addressing Stamping Die Errors

Errors or a lack of material edge obstruction in the stamping die itself can contribute to feed pitch instability. In such cases, consider initial manual feeding with test products to determine if the issue stems from the die’s design or manufacturing flaws. If the die is the culprit, it may require correction or replacement to ensure stable feeding.

5. Managing Stamping Oil

Stamping production often involves the application of lubricating oil to prevent material overheating due to friction with the die. However, if stamping oil infiltrates the gap between the feeding drum and the material, it can lead to slipping and inaccuracies in feeding. In such situations, regular cleaning and wiping of the feeding drum are necessary to maintain smooth and precise feeding.

6. Optimizing Feeding Time

Different molds have specific requirements for feeding time. Setting the feeding time too late can result in inadequate feeding. To resolve this issue, readjust the cam angle for the feeding signal on the press to align with the requirements of the mold being used.

7. Fine-Tuning Relaxation Time

An incorrect relaxation time setting can cause material to be inadequately fed or retract prematurely. To rectify this issue, readjust the cam angle for the relaxation signal on the press to ensure that it aligns with the specific requirements of the stamping process.

In conclusion, NC servo feeders have undoubtedly elevated precision and automation in the stamping industry. To fully harness their capabilities, manufacturers must address common issues such as unstable feed pitch promptly. By understanding and rectifying these issues, manufacturers can ensure the consistent and reliable performance of NC servo feeders, ultimately improving the quality and efficiency of their stamping production processes.

nc servo feeder
nc servo feeder