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Nozzle Cleaning, Detection and Sorting Machine

The nozzle cleaning, detection and sorting machine adopts 3 × 5-megapixel cameras for detection. The camera field of view is approximately 29×22, with a single-pixel precision of about 0.01mm, enabling high-precision measurement. It is composed of a set of special visual measurement software.


The machine detects in two stations (divided into upper and lower stations). Operators place the small fixtures loaded with products in fixed positions and press the start button. The upper-station camera first moves to check whether each product is placed in position one by one, then confirms if the large fixture has empty slots ready. After completion, the gripper moves to transplant the products from the small fixture to the large fixture. After air drying and pressure testing, the lower-station camera takes photos to detect the appearance and dimensions of the products, finally giving an OK/NG result for each product.

Product introduction

Problems in Nozzle Cleaning

  • Quality: The nozzle condition cannot be measured numerically.

  • The cleaning steps and judgment criteria are vague.

  • Time: Huge workload in nozzle reassembly and cleaning operations.

  • Cost: No man-hours allocated for nozzle maintenance.

Solving Problems through Automation

  • Detect product appearance and dimensions. A total of four product types.

    • Y-axis

    • Operators place the small fixtures loaded with products in fixed positions and press the start button.

    • The upper-station camera first moves to check whether each product is placed in position one by one, then confirms if the large fixture has empty slots ready.

    • Gripper

    • Large fixture

    • After completion, the gripper moves to transplant the products from the small fixture to the large fixture. After air drying and pressure testing, the lower-station camera takes photos to detect the appearance and dimensions of the products, finally giving an OK/NG result for each product.

    • Air drying

    • Pressure testing

    • Lower-station camera

    • Small fixture ①

    • Small fixture 2

    • Small fixture 3

    • Camera

    • Product

    • Lens

    • Light source

    • Light source

    • Lens

    • Product

    • Camera

    • Upper station

    • Lower station

    • X-axis

    • Z-axis

    • Upper-station camera

    1. This project uses 3 × 5-megapixel cameras for detection, with a camera field of view of approximately 29×22 and a single-pixel precision of about 0.01mm, enabling high-precision measurement. It is equipped with a set of special visual measurement software.

    2. This detection scheme uses two stations (divided into upper and lower stations):

Detectable Items (marked as follows):

Front Side | Back Side


  1. Character position, whitening, blackening detection. | 3. Outer ring radius

  2. Distance | 4. Radius
    | 5. Radius
    | 6. Presence of central hole
    | 7. Radius


Front Side | Back Side


  1. Radius | 1. Radius

  2. Radius | 2. Radius

  3. Length and width | 3. Radius

  4. Radius | 4. Radius

  5. Radius | 5. Radius

  6. Radius | 7. Radius


Front Side | Front Side


  1. Radius | 3. Character position, whitening, blackening detection

  2. Radius | 4. Cylindrical radius

  3. Radius | 6. Radius
    | 8. ...


Back Side | Front Side
7. Radius | 1. Radius
8. Width | 2. Radius
9. Radius | 5. Radius
10. Appearance: Deep scratches and cuts | 6. Radius
| 8. ...

Test Results of Customer's Defective Samples

Back Side | Front Side
| Severe deformation | Nozzle damage
Detectable | Detectable
| Nozzle missing | Slight deformation
Detectable | Undetectable

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