S. Kaçmaz, C. Yilmaz, L. Kangi, M. Telli, S. Yelekçi
Calibration of Automatic Gravimetric Filling Instruments in Dynamic Weighing

The project of traceable calibration of automatic weighing instruments operating in the dynamic mode, one of the EMPIR, focuses on the development of reproducible calibration methods and measurement uncertainty evaluation models for different groups of AWIs such as automatic catch weighers, automatic instruments for weighing road vehicles in motion and automatic gravimetric filling instruments. In this study details on the calibration of automatic gravimetric filling instrument, error model and uncertainty budget for the determination of the uncertainty of measurement of in dynamic weighing have been mentioned by the calibration practice

A. Akio Kochi, B. Takanori Yamazaki
Driving Force Measurement for Feed Drive System in Microscopic Motion

In all ages it is always required to improve the accuracy for machine tools. It is well known that the nonlinear behaviors of the rolling elements influence the motion accuracy of the feed drive system in machine tool. In this study the feed drive system using the linear motor is constitute, and the rolling element is limited only to the linear guide. The dynamic behavior of driving force when micro displacement is input for this system will be examined in detail, and it is clarify the behavior of rolling elements.

Meng Feng, Zhang Zhimin, Li Tao, Lin Jing
Design of Torque Standard Machine for Calibration of Reference Torque Wrench at NIM

The paper describes the design of a new torque standard machine at NIM. This machine is used to calibrate the reference torque wrench and torque transducer. The measurement uncertainty is expected to reach 0.03 % (k = 2). The range is designed from 10 N · m to 5000 N · m.

A. Yuji Yamakawa, B. Takanori Yamazaki
Dynamic Behavior of Mass Measurement System Using Load-Cell Effect of Partial Load Distribution

This paper discussed behaviors of a mass measurement system with a load-cell type. The goal of this paper was to explore a dynamic behavior of the system with consideration of partial load distribution depending on the place of the product. In this paper, we obtain time responses for step response while the product is put on the place with three patterns on the conveyor. Moreover we analyze the frequency responses based on the step responses with FFT. Consequently, we found that the dynamic behavior may change for the product location on the conveyor.

Wang Jian, Cai Changqing, Zhang Yue, Ren Xiaoping, Zhong Ruilin, Hu Manhong, Wang Xiang
Research on 2000 kg Mechanical Balance with the Sensitivity of 1.3 g

The calibration requirement of the whole more than 500 kg weight is increasing year by year in China, expecially, the class F 1 weight and the weight from the huge deadweight force standard machine and huge torque standard machine. The advantages of measurement more than 500 kg on a new 2000 kg mechanical balance are introduced in the paper. In order to obtain high measurement uncertainty, four vertical forces of two sides of beam is measured and used as reference for adjustment of beam position. Laser displacement sensors to be used in the indication system are more effective for decreasing reading error caused by human vision. The counter weight selecting system is developed for getting any combinations of weights in a limited space. The sensitivity of the new mechanical balance for 2000 kg is better than 1.3 g.