Application of Linear Servo Motor in Biochip Microarray Instrument

2013 ◽  
Vol 321-324 ◽  
pp. 795-798
Author(s):  
Quan Liu ◽  
Qiao Qiao Liu ◽  
Xiao Fei Wang ◽  
Xue Zhao
Keyword(s):  
High Speed ◽  
Ball Screw ◽  
Servo Motor ◽  
Direct Drive ◽  
Improve Performance ◽  
Positioning Accuracy ◽  
Linear Motors ◽  
Rotary Motors ◽  
Automation Control ◽  
Novel Design

A novel design to biochip microarray instrument is use of linear motors, in preference to conventional rotary motors driving ball screw. Three ironless core linear servo motors direct drive the X, Y and Z-axis motion, Improve performance such as superior positioning accuracy, high-speed operation and increased efficiency. The whole configuration for new microarray printing instrument is designed. Furthermore, the structure of special linear motors is also designed detailedly. And the linear servo motor automation control technology is introduced in this paper.

Design of High Speed NC Crankshaft Grinding Machine

2010 ◽  
Vol 33 ◽  
pp. 17-21 ◽  
Author(s):  
Xiao Jun Wang ◽  
Zhao Hui Liu
Keyword(s):  
Boron Nitride ◽  
High Speed ◽  
Rotation Speed ◽  
Cubic Boron Nitride ◽  
Numerical Control ◽  
Ball Screw ◽  
Wear Particles ◽  
Servo Motor ◽  
Grinding Machine

Siemens AG SINUMERIK820 is used for high-speed numerical control (NC) grinder, which integers CNC and PLC and is safe and reliable. The mechanism of high speed spindle is that the motor and spindle are combined as one body; rapid feedrate is realized by steep-lead ball screw and increasing feed servo motor rotation speed; the wear particles of wheel are mainly of cubic Boron Nitride and diamonds; and the machine is more stable and reliable.

Linear Motor Direct Drive Key Technology Problems and the Solution Countermeasures

2013 ◽  
Vol 411-414 ◽  
pp. 3052-3055
Author(s):  
Yao Bin Hu ◽  
Jing Xie ◽  
Liang Bin Hu
Keyword(s):  
High Speed ◽  
Supply Voltage ◽  
Linear Motor ◽  
Direct Drive ◽  
Key Technology ◽  
Linear Motors ◽  
Magnetic Attraction ◽  
Working Principle ◽  
And Performance ◽  
Gravity Acceleration

Linear motor direct drive with the advantages of simple structure, fast dynamic response, high precision, high speed, big acceleration, small noise and vibration, is the ideal transmission for all kinds of ultra-high speed and precision machine tool. This paper introduces the working principle and performance features of linear motors, and elaborates on the key technology problems and the solution countermeasures of seven aspects including the efficiency and the power factor, the cooling measure, the normal magnetic attraction, the servo-control, magnetism isolation and the protection, the gravity acceleration and the supply voltage of the linear motor.

A Study on Heat Generation Control of a Precision Ball Screw Drive System

2013 ◽  
Vol 680 ◽  
pp. 360-363 ◽  
Author(s):  
Zhe Zhu Xu ◽  
Xiao Jing Liu ◽  
In Bum Lee ◽  
In Shup Ahn ◽  
Sung Ki Lyu
Keyword(s):  
High Precision ◽  
High Speed ◽  
Drive System ◽  
Ball Screw ◽  
Air Cooling ◽  
Positioning Accuracy ◽  
Screw Drive ◽  
System A ◽  
Ball Screw Drive ◽  
Generation Control

In this paper, a novel/well designed high speed/high precision nut air cooling ball screw system was developed to avoid thermal errors which affect the positioning accuracy and the temperature rise of ball screw. In order to discuss the effectiveness of the developed high speed/high precision nut air cooling ball screw system, a series of tests was done. As the results, it shows that the positioning accuracy will significantly improve with the use of the nut air cooling ball screw drive system shown in this paper.

Linear motor drive ultrahigh-speed injection moulding machine

2002 ◽  
Vol 216 (5) ◽  
pp. 773-781 ◽  
Author(s):  
Y-B Bang ◽  
S Ito
Keyword(s):  
Contact Force ◽  
Injection Moulding ◽  
High Speed ◽  
Linear Motor ◽  
Total Output ◽  
Inertia Force ◽  
Motor Drive ◽  
Direct Drive ◽  
Linear Motors ◽  
Moulding Machine

This paper presents a report on the development of a linear motor drive injection moulding machine for the attainment of ultrahigh-speed injection moulding. Until now it has been impossible to produce such a high speed with all-electric injection moulding machines, although the need for such ultrahigh-speed, electrically driven injection moulding machines has clearly existed. However, direct drive by linear motors may cause brief nozzle separation from the sprue bushing because of an inertia force as large as the total output thrust of the linear motors, and this momentary separation can cause molten plastic leakage. In this paper, two solutions are proposed for this inertia force problem. One is mechanical cancellation of the inertia force, the other is an increase in the nozzle contact force. Furthermore, a new nozzle contact mechanism is proposed that prevents the stationary platen bending caused by the nozzle contact force. Some experimental results on a manufactured all-electric, ultrahigh-speed injection moulding machine are presented.

Hybrid Modeling of Ball Screw Drives With Coupled Axial, Torsional, and Lateral Dynamics

2009 ◽  
Vol 131 (7) ◽  
Author(s):  
Chinedum E. Okwudire ◽  
Yusuf Altintas
Keyword(s):  
Fatigue Life ◽  
High Speed ◽  
Element Model ◽  
Ball Screw ◽  
Experimental Proof ◽  
Positioning Accuracy ◽  
Servo Systems ◽  
Lateral Dynamics ◽  
Lumped Masses ◽  
Ball Screw Drives

It has been a common practice to assume that the torsional and axial dynamics are totally decoupled from the lateral dynamics of the screw when modeling ball screw drives. However, experiments show that there is a considerable coupling between them, which could adversely affect the positioning accuracy and fatigue life of the drive. In this paper, the lateral dynamics of the screw is explicitly incorporated into the hybrid finite element model of ball screw drives. The ball screw is modeled by Timoshenko beam elements, and the balls, joints, bearings, and fasteners are modeled as pure springs. Rigid components are modeled as lumped masses. The proposed screw-nut interface model, which includes the effects of lateral vibrations, is shown to predict the coupling between axial, torsional, and lateral dynamics of ball screw drives. The effects of this dynamic coupling on the positioning accuracy of the drive are also presented with experimental proof. The proposed model provides a more realistic platform for a designer to optimize the drive parameters for high speed-high acceleration machine tool applications, where the ball screw vibrations limit the fatigue life of the mechanism, bandwidth of the servo systems, and positioning accuracy of the machine.

Improvement of Thermal Deformation in a Newly Developed Steel CFRP Composite Ball Screw

2020 ◽  
Author(s):  
Hayato Yoshioka ◽  
Shunya Saito ◽  
Jun Kato ◽  
Hidenori Shinno ◽  
Shunsuke Goto ◽  
...  
Keyword(s):  
Machine Tools ◽  
High Speed ◽  
High Performance ◽  
Thermal Deformation ◽  
High Efficiency ◽  
Cooling System ◽  
Cutting Tools ◽  
Large Error ◽  
Ball Screw ◽  
Positioning Accuracy

Abstract Machine tools are required to realize high precision and high efficiency machining by various industry sectors. A machine tool has some driving systems to position cutting tools and workpieces, and hence driving units are required high speed and precision positioning. However, high speed feed motion causes thermal deformation due to generated heat at friction surfaces such as guideway, feed screw, and bearings, it deteriorates positioning accuracy of driving units. Thermal deformation of a ball screw is one of large error factors of lower positioning accuracy, and a cooling system for reducing thermal deformation is installed into machine tools. Since the cooling system needs additional cost and space in machining systems, a new method for minimizing thermal deformation is required. In this study, a new structure of ball screw is proposed in order to meet these requirements. A new ball screw which has a core pipe made of CFRP was developed. CFRP is one of composite materials which have light weight and low thermal expansion. This paper presents analysis results of a simplified FEM model of the ball screw and the basic experimental results of the developed ball screw. These results confirmed that the proposed ball screw was applied to high performance positioning system in machine tools.

Development of Precision Positioning Stage

2019 ◽  
Vol 18 (01) ◽  
pp. 103-111
Author(s):  
Prabha Niranjan ◽  
Shashikantha Karinka ◽  
KVSSSS Sairam
Keyword(s):  
High Speed ◽  
Ball Screw ◽  
Friction Compensation ◽  
Programmable Logic ◽  
Precision Positioning ◽  
Positioning Accuracy ◽  
High Productivity ◽  
Productivity Gain ◽  
Positioning Stage ◽  
Machine Interface

The growing demand for positioning accuracy in machines with high speed plays an important role in achieving high productivity gain. A system that is capable to achieve both coarse (macro) and fine (micro) positioning finds a variety of applications in precision positioning. In the proposed work, a macro positioning stage is developed with a ball screw actuator and a micro positioning stage is developed with an additional gear reduction unit. The coarse and fine positioning with friction compensation is achieved and the steady state error is minimized. The developed system is controlled using a programmable logic controller and operated with human machine interface.

Dynamic and Positioning Performances of Linear Electromechanical Actuator

2015 ◽  
Vol 809-810 ◽  
pp. 682-687
Author(s):  
Vasile Nasui ◽  
Mihai Banica ◽  
Dinu Darabă
Keyword(s):  
Dynamic Characteristics ◽  
Practical Importance ◽  
Correct Identification ◽  
Positioning System ◽  
Positioning Error ◽  
Servo Motor ◽  
Positioning Accuracy ◽  
Electromechanical Actuator ◽  
Initial Errors ◽  
Selection For

This paper presents the dynamic characteristics and the proposed positioning performance of the system to them investigated experimentally. In this research, we developed the positioning system and we evaluated positioning accuracy. The developed system uses a servo motor for motion actuation. In this paper, we focused on studying the dependency of the positioning error – elementary errors – the position of the conducting element for the mechanism of the transformation of the rotation translation movement, representatively the mechanism screw – screwdriver and on emphasizing the practical consequences in the field of design, regulation and exploitation of the correct identification of all the initial errors in the structure of the mechanism, their character and the selection for an ultimate calculus of these which are of a real practical importance.

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