Reasons And Countermeasures For SMT Chip Machine Throwing Materials
SMT (Surface Mount Technology) in the process of electronic assembly of the chip machine, the throwing phenomenon refers to the situation that the chip machine cannot correctly pick up or place the components, resulting in the disposal of components. Throwing not only increases production costs, but also reduces production efficiency. The following are some common reasons for SMT chip machine throwing materials and their corresponding countermeasures:
Reason 1: Sucking mouth problem
• Problem: The suction nozzle is deformed, blocked or broken, resulting in insufficient air pressure or air leakage, affecting the normal suction of components.
• Countermeasures: Clean and check the suction nozzle regularly, and replace a new suction nozzle if necessary to ensure that it is in good condition.
Reason 2: Identify system problems
• Problems: poor vision, unclean lens or debris interference, improper selection of identification light source, damage to identification system, etc.
• Countermeasures: Clean the lens, adjust the intensity and grayscale of the light source, and ensure the normal function of the identification system.
Reason 3: Location problem
• Problem: The material is not in the center of the component, and the material height is incorrect, resulting in offset.
• Countermeasures: Calibrate the pick-up position and height to ensure that they match the actual size of the components.
Reason 4: Vacuum problem
• Problem: Insufficient air pressure, vacuum pipe blockage or leakage, resulting in unstable suction.
• Countermeasures: Check the vacuum system, clean or replace the vacuum pipe, and ensure the stability of air pressure.
Reason 5: Program problems
• Problem: The programming parameters do not match the actual component size, brightness, etc.
• Countermeasures: Re-proofread the programming parameters to ensure that they are consistent with the physical object.
Reason 6: Feeder problem
• Problem: The feeder feeding is not accurate, resulting in the deviation of the component position.
• Countermeasures: Adjust or repair the feeder to improve the feeding accuracy.
Reason 7: Component parameter setting error
• Problem: The size of the suction nozzle is set incorrectly, and the suction force is not enough to stabilize the suction components.
• Countermeasures: Adjust the equipment parameters and choose the suction nozzle suitable for the size of the component. Reason 8: Equipment maintenance
• Problem: The equipment is not maintained regularly according to the maintenance record form.
• Countermeasures: Follow the equipment maintenance plan, carry out regular equipment maintenance, and reduce operating failures.
Reason 9: Concentricity problem of the Z-axis of the pasting head
• Question: When rotating components at different angles, the angle deviation is large.
• Countermeasures: Calibrate the Z axis of the pasting head to ensure the concentricity.
In summary, solving the problem of SMT mounting machine material throwing needs to start from many aspects, including regular maintenance of equipment, accurate parameter setting, system cleaning and calibration, etc., to ensure the high accuracy and high efficiency of the whole mounting process.
