Operating NC Servo Feeder machines with proficiency calls for a keen understanding of troubleshooting and maintenance processes. This knowledge ensures a high level of stamping precision, stability, and product quality. In comparison to air feeders and roller feeders, NC Servo Feeders stand out due to their simplicity, primarily involving touchscreen adjustments. This makes troubleshooting a pivotal part of their operation.

Yet, like any machine, NC Servo Feeders are not without their occasional challenges. Feeding errors are among the most common issues. In this article, we will examine the root causes of these errors and provide specific solutions to mitigate them.

Common Causes of Feeding Errors and Their Solutions

1. Insufficient Feeding Time

The feeding time may be insufficient for the NC Servo Feeder due to high-speed presses or slow feeding speeds. This deficiency often leads to inadequate feeding time.

Solution: Increase the feeding time by adjusting the feeding angle of the NC Servo Feeder. This adjustment can be achieved either electronically or mechanically. Speed up the feeding until it synchronizes with the press speed.

2. Incorrect Relaxation Time

Inaccurate relaxation time in the NC Servo Feeder can be another source of feeding errors.

Solution: Ensure the relaxation time is correct. The relaxation process starts when the guide pin tip is fully inserted into the positioning hole and clamps before the guide pin tip exits the hole. Make the necessary adjustments based on the cylinder’s reaction speed.

3. Molds and Material Movement

If molds jam, pull the material, or if the material doesn’t move smoothly, errors can occur. The material may even be lifted when the upper mold departs.

Solution: Modify the mold until the material moves smoothly within it, and the mold doesn’t lift the material during separation.

4. Material Deformation

Certain materials are susceptible to deformation. Narrow or soft materials can easily deform during the feeding process, causing inaccurate feeding.

Solution: Removing the air pipe below the cylinder of the NC Servo Feeder and loosening the clamping spring may address this problem. If not, consider replacing the feeding roller with a PU rubber roller.

5. Material Slippage

Material slippage is another common cause of feeding errors. This can be due to overly heavy material in the buffer zone, excessive vibration of the buffer material, or the leveling machine material rack’s speed behind the servo feeder not keeping pace, causing a pulling effect.

Solution: Lower the press speed and support the buffer material with a bracket to reduce vibration. Increase the speed of the material rack and the leveling machine to match the press feeding speed.

6. Electromagnetic Field Interference

The duration of servo feeder feeding can vary due to electromagnetic field interference.

Solution: Move the equipment to avoid magnetic field interference and ensure proper grounding.

7. Unstable Power Supply and Air Pressure

An unstable power supply can disrupt the internal precision instruments, resulting in incorrect commands that can lead to machine shutdown and feeding errors. Unstable air pressure can lead to uneven relaxation of the feeder and result in material retraction.

Solution: Connect the feeder to a stable power supply and air source.

8. Uneven Material Width

Uneven material width can cause mold jamming and inaccurate feeding.

Solution: Replace with a quality-compliant material coil.

9. Mechanical Issues

Mechanical problems can lead to feeding errors, including loose feeder fixing screws, gears with impurities, rollers with debris, severe wear of roller bearings, and significant wear of mechanical rotating parts.

Solution: Secure the feeder, clean the gear and the feeding roller, and if there’s severe long-termmechanical wear, seek professional assistance.

Final Thoughts

NC Servo Feeders, despite their simplicity, require diligent care and maintenance to ensure optimal functionality and longevity. By gaining an understanding of common issues and their resolutions, users can maintain their machines at peak performance levels, resulting in improved stamping precision, stability, and product quality.

Regular checks, timely troubleshooting, and preventive maintenance can prevent most feeding errors. Should severe mechanical wear or other challenges persist, don’t hesitate to reach out for professional support. The key is to act proactively, recognizing and addressing problems before they escalate, thus safeguarding your investment in NC Servo Feeders and ensuring a smooth, efficient operation.

NC Servo Feeder
NC Servo Feeder