Factors Affecting Servo Feeders
Under normal conditions and without external factors, the precision of a servo feeder is generally around 15 lines (0.15mm). To further improve precision, positioning pins should be installed in the mold to complement the loosening effect of the feeder. When feeding errors occur, the first thing to check is whether the mold is stable. Next, stop the punch. After the mold stabilizes, manually feed the material, draw a line on the steel strip, and measure the feeding error range.
There are several key factors affecting servo feeders:
1. Feeding Speed:
If the servo feeder’s automatic speed is too fast, the feed rollers may slip when the servo motor starts quickly, or the motor may shake when it stops abruptly. Therefore, the faster the feeding speed, the poorer the precision. Slower speeds are more stable.
Solution: Set the automatic speed to a lower value, ensuring it keeps up with the continuous firing of the punch.
2. Feeding Length:
The longer the feeding length, the greater the cumulative error. Longer lengths require faster feeding speeds, which affects the feeding precision.
Solution: Reduce the automatic speed and control the punching process via the feeder.
3. Material Width or Thickness:
The wider or thicker the material, the higher the load rate. When the servo motor starts quickly, the material may slip, or the weight of the material may cause deviations, affecting precision.
Solution: Use a high-torque motor or increase the feeder's width.
4. Mold Surface Quality:
If the steel strip does not smoothly fit with the mold during feeding, issues such as burrs, material adhesion, or uneven friction between the steel strip and mold materials can occur.
Solution: First, check if the mold is misaligned. Ensure the reference line of the mold is perpendicular and parallel to the press table or feeder. If not, the steel strip will shift during feeding. Also, inspect the mold for damage and ensure the strip runs smoothly inside.
5. Incorrect Feeding or Over tightened / Loose Clamping Nuts:
In such cases, the steel strip tends to drift, impacting feeding accuracy.
Solution: During feeding, the steel strip should be parallel and perpendicular to the feeder. Evenly tighten or adjust the nuts or springs on both sides.
Servo Feeder Advantages:
Servo feeders use an electric control system to drive the servo motor to accurately feed the material, overcoming the limitations of traditional feeders such as low precision, high failure rates, and complex adjustments. It is a cost-effective solution for the stamping industry. Proper installation is key to fully unleashing its efficient performance. After leaving the factory, installation videos or remote guidance are provided. Additionally, professional installation personnel can be sent to the customer’s site (for a fee) to help with assembly and debugging, ensuring the production line reaches peak efficiency.
The servo control system of the feeder uses a stepper motor, driven by a pulley system, to rotate the lower rollers. The material is fed in precise quantities using servo control technology. Depending on the required feeding length, users can easily input settings on the feeder's electrical control box. The servo stepper motor and driver then adjust the lower roller's rotation angle for accurate feeding, quickly positioning the material for the punching process. This system, combined with a precision press, ensures simple adjustments, high feeding accuracy, good stability, and a broad application range. It effectively reduces labor costs and enhances production efficiency.
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