How to analyze the accuracy of measurement project

  1. Analysis principles of measuring projects:
    Workpieces have tolerances, generally requiring visual accuracy of 1/10 to 1/5 of the tolerance zone. For example, when producing a workpiece with a length of 50mm, a tolerance of ±0.5mm is considered acceptable. Therefore, the accuracy/error requirement for the visual system is 0.1mm = ±0.05mm.

  2. Accuracy analysis of the inspection system
    (1) Comprehensive accuracy
    Determine whether the system needs to be integrated with a robot, such as position detection. If so, the robot error should be added to the vision system error. Note: This is not a simple additive relationship.
    The LNX camera needs to be triggered in conjunction with the encoder of the linear motion mechanism, so its Y-axis accuracy will be affected by the encoder’s accuracy.
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    (2) Vision system
    The accuracy of the vision system consists of hardware accuracy and software/algorithm accuracy . In practical projects, the software algorithm accuracy can be ignored and considered equal to the camera’s intrinsic accuracy. For example, for UHP, the accuracy is within 30μm.