Related Experiment Video
Updated: Jun 26, 2025
09:36
Measurement of Spatial Stability in Precision Grip
Published on: June 4, 2020
3.2K
Development of fixed-point two-degree-of-freedom angular error measurement system with precision improvement function
Yu Ming Su1, Chien-Sheng Liu1,2
1Department of Mechanical Engineering, National Cheng Kung University, No.1, University Road, Tainan City 70101, Taiwan.
The Review of Scientific Instruments
|May 8, 2024
Summary
This study introduces a novel two-degree-of-freedom (two-DOF) angular error measurement system for die bonding machines. The system achieves high accuracy in measuring micro-angular errors, crucial for precision industries.
Area of Science:
- Precision Engineering
- Optical Metrology
- Mechanical Systems
Background:
- Accurate measurement of micro-angular errors is vital for enhancing equipment precision in industries.
- Die bonding machines require precise assembly angle error measurement for optimal performance.
Purpose of the Study:
- To develop a two-degree-of-freedom (two-DOF) angular error measurement system.
- To simultaneously measure assembly angle errors of a die bonding machine's bond head.
Main Methods:
- Utilized the laser collimation method with a fiber laser and position-sensitive detectors.
- Implemented angular drift compensation and averaging functions for enhanced accuracy.
- Established a mathematical model using skew-ray tracing.
Main Results:
- Achieved a measuring accuracy of ±0.25 arcsec.
- Demonstrated a measuring repeatability of 0.3 arcsec.
- Validated the system's effectiveness through experimental testing.
Conclusions:
- The developed two-DOF system effectively measures micro-angular errors in die bonding machines.
- The system's design and methods contribute to improved precision in manufacturing equipment.
- The achieved accuracy and repeatability meet stringent requirements for precision industries.
Related Concept Videos
01:24One-Degree-of-Freedom System
487
In mechanical engineering, one-degree-of-freedom systems form the basis of a wide range of electrical and mechanical components. Using these models, engineers can predict the behavior of various parts in a larger system, which gives them insight into how different forces interact with each other.
A one-degree-of-freedom system is defined by an independent variable that determines its state and behavior. One example of a one-degree-of-freedom system is a simple harmonic oscillator, such as a...
A one-degree-of-freedom system is defined by an independent variable that determines its state and behavior. One example of a one-degree-of-freedom system is a simple harmonic oscillator, such as a...
487
01:12Adjusting a Traverse
56
In the site survey of a four-sided traverse, internal angles are essential to ensure geometric accuracy. The survey revealed that the sum of the measured internal angles was 359 degrees and 48 minutes, which is 12 minutes less than the expected 360 degrees. This discrepancy signals an error likely arising from measurement inaccuracies during the fieldwork.To rectify this error, the adjustment process involved distributing the 12-minute shortfall equally across the four internal angles. By...
56
01:29Relative Motion Analysis using Rotating Axes-Problem Solving
400
Consider a crane whose telescopic boom rotates with an angular velocity of 0.04 rad/s and angular acceleration of 0.02 rad/s2. Along with the rotation, the boom also extends linearly with a uniform speed of 5 m/s. The extension of the boom is measured at point D, which is measured with respect to the fixed point C on the other end of the boom. For the given instant, the distance between points C and D is 60 meters.
Here, in order to determine the magnitude of velocity and acceleration for point...
Here, in order to determine the magnitude of velocity and acceleration for point...
400
01:15Distance Corrections
27
To achieve precise distance measurements, especially in surveying and construction, certain corrections must be applied to account for potential sources of error like the standardization errors, temperature variations, and slope adjustments.Standardization error emerges when measurement equipment undergoes changes, such as wear, repairs, or weather impacts. To address this, surveyors compare the equipment’s readings to a standard. This process identifies any deviation that might lead to...
27
01:16Rotation with Constant Angular Acceleration - II
6.0K
Kinematics is the description of motion. The kinematics of rotational motion discusses the relationships between rotation angle, angular velocity, angular acceleration, and time. One can describe many things with great precision using kinematics, but kinematics does not consider causes. For example, a large angular acceleration describes a very rapid change in angular velocity without any consideration of its cause. Thus, rotational kinematics does not represent the laws of nature.
The first...
The first...
6.0K
01:26Rotational Motion about a Fixed Axis
464
A rigid body's rotation around a fixed axis makes every point within it trace a circular path around a specific line or point. The term given to this type of spinning is defined by the angular position, symbolized by the angle θ. This angle is gauged from a static reference line to the revolving object. From this angular position, any variation is referred to as angular displacement, denoted by dθ. The extent of this displacement can be calculated in degrees, radians, or...
464