NC servo feeders are the industry’s go-to choice for coil material feeding, offering both mechanical and pneumatic relaxation options. However, material slippage can lead to inaccurate feeding and disrupt production. In this comprehensive guide, we’ll explore the causes of slippage and provide effective solutions to maintain optimal performance.
Understanding the NC Servo Feeder Mechanism and Causes of Slippage
At the heart of the NC servo feeder mechanism are two rollers that clamp and feed the material forward. The upper roller applies pressure and opens, while the lower roller is driven by a servo motor with a synchronous belt transmission. Slippage typically arises from two main issues:
- Insufficient friction between the roller and the material
- Inadequate pulling force exerted by the roller on the material
To address these issues, we can either increase the pressure or adjust the friction coefficient between the roller and material. If the material feeds normally but occasionally retreats, it’s likely due to insufficient pulling force, especially when the material is near or exceeds the feeding limit. In such cases, refer to the suggestions below or consult our company for assistance.
Tailoring Adjustments for Different NC Servo Feeder Types
Depending on the type of NC servo feeder and the material’s thickness, there are three key areas to adjust:
- Mechanical relaxation NC servo feeders: Increase the upper feeding roller’s pressure by adjusting its pressure spring. If a yellow pressure spring is installed, consider replacing it with a stronger spring, such as green (green > red > blue > yellow).
- Pneumatic relaxation NC servo feeders: Verify whether the feeder’s cylinder connects to only one air tube. If so, it will function solely during relaxation, relying on the pressure spring for clamping. This can result in insufficient clamping and slippage when feeding thick materials. To remedy this, connect an additional air tube from the solenoid valve to the cylinder, which generates extra pushing force and secures the material more tightly.
- Optimizing feeding speed: Minimize the distance between the feeder and the leveling machine or material rack to reduce the size of the material waiting area. This decreases the weight of the material in the waiting area, reducing the servo motor’s load and effectively preventing slippage caused by excessive material weight.
Caution: Adhere to Maximum Thickness Ranges
It’s crucial to note that the above adjustment methods apply only to materials within the NC servo feeder’s maximum thickness range. Overloading the servo motor with materials exceeding this range may result in damage. Exercise caution when handling materials with varying thicknesses.
By understanding the underlying causes of material slippage in NC servo feeders and implementing these targeted adjustments, you can optimize your feeder’s performance, minimize disruptions, and improve overall production efficiency.