How to adjust the vibratory feeder for fiber optic sensor

To optimize a vibratory feeder with a fiber optic sensor, adjust the feeder's vibration frequency, spring tension, and sensor delay settings to ensure accurate part detection and controlled feeding.Step 1: Understand the System

Before adjustments, familiarize yourself with the feeder components: the bowl, springs, vibrating motors, eccentric weights, and the fiber optic sensor installed on the linear track or bowl discharge area . Review the manufacturer's manual for safety guidelines and specific model instructions.

Step 2: Adjust the Feeder's Resonant Frequency

The feeder's vibration frequency is influenced by the spring/mass ratio. To tune the feeder:

• Use a variable frequency control (VFC) with a sensor attached to the bowl to measure the current frequency .
• Add springs to increase the resonant frequency or remove springs to decrease it.
• Aim to tune the feeder slightly above the desired frequency (about 1 Hz) to allow for over-tuning, which improves performance under voltage fluctuations or part weight variations .
• For fixed frequency feeders, ensure all drive unit bolts are properly tightened and the feeder is mechanically stable.

Step 3: Adjust Vibration Force

• Locate the eccentric weights on the vibrating motors. Each motor typically has one fixed and one adjustable weight .
• Loosen the adjustable weight bolts and rotate to increase or decrease vibration force.
• Align weights on both motors for balanced vibration.
• Test and observe the part flow, making incremental adjustments as needed.

Step 4: Configure the Fiber Optic Sensor

• Open the feeder controller and locate the Switch Sensor terminal.
• Connect the sensor wires: brown to +24V, black to Input, and blue to GND .
• Turn on the controller and access the Function button to adjust ON Delay and OFF Delay:
  • OFF Delay: Determines how long the feeder continues running after the sensor signals “full.” Too short may stop the feeder prematurely; too long may cause part accumulation.
  • ON Delay: Determines how long the feeder waits before restarting after the sensor signals “empty.” Factory default is usually 0.2 seconds, often sufficient for linear tracks .
• Test the system to ensure the feeder stops and starts smoothly in response to the sensor.

Step 5: Test and Fine-Tune

• Run the feeder with parts and observe the sensor response.
• Adjust vibration amplitude, frequency, or sensor delay as needed to prevent stacking, misfeeds, or jams .
• Regularly clean the feeder and sensor to maintain consistent performance . By following these steps, the vibratory feeder will operate efficiently with the fiber optic sensor, ensuring controlled, single-part feeding and reliable automation.