Developing an inkjet printer IV: printer mechanism control for best print quality

2020 ◽  
Vol 2020 (15) ◽  
pp. 349-1-349-9
Author(s):  
Daulet Kenzhebalin ◽  
Baekdu Choi ◽  
Sige Hu ◽  
Yin Wang ◽  
Davi He ◽  
...  
Keyword(s):  
Motor Control ◽  
Constant Velocity ◽  
Control Problems ◽  
Print Quality ◽  
Control Parameters ◽  
Test Page ◽  
Mechanism Control ◽  
Testing Accuracy ◽  
Inkjet Printer

Inkjet printer motor control consists of moving the printhead in the scan direction and in the process direction. Both movements have different objectives. Scan direction movement needs to have constant velocity and process direction movement needs to have accurate movement. In this paper, we discuss a method for controlling the velocity of the printhead and how to tune the motor control parameters. We also design six test pages for testing accuracy of the printhead movement and cartridge properties. For each test page, we discuss expected prints, common printer control problems that could alter the print quality, and how to identify them.

Learning motor control in the upright position: A mechanical engineering approach

2001 ◽  
Vol 215 (3) ◽  
pp. 315-323 ◽  
Author(s):  
R E Major ◽  
G R Johnson ◽  
P B Butler
Keyword(s):  
Motor Control ◽  
Clinical Results ◽  
Biomechanical Analysis ◽  
Control Problems ◽  
Therapeutic Approaches ◽  
Trunk Control ◽  
New Approach ◽  
Functional Activities ◽  
The Central Nervous System ◽  
Head And Trunk Control

Motor control problems that result from damage to the central nervous system can make it difficult to learn functional activities. Although several therapeutic approaches attempt to address such problems there is little evidence of their efficacy. Targeted Training is a new approach, based on a biomechanical analysis of the problem, which usually relies on specifically designed equipment. This paper describes the underlying theory, the development of functional specifications, the translation of these specifications into an engineering design and the clinical results of applying the equipment. The promotion of head and trunk control provides an example of the process.

scholarly journals Application of Optimal HAM for Finding Feedback Control of Optimal Control Problems

2013 ◽  
Vol 2013 ◽  
pp. 1-10 ◽  
Author(s):  
H. Saberi Nik ◽  
Stanford Shateyi
Keyword(s):  
Optimal Control ◽  
Optimal Control Problems ◽  
Convergent Series ◽  
Residual Error ◽  
Control Problems ◽  
Strong Nonlinearity ◽  
Control Parameters ◽  
Convergence Control ◽  
Hamilton Jacobi Bellman ◽  
Optimal Approach

An optimal homotopy-analysis approach is described for Hamilton-Jacobi-Bellman equation (HJB) arising in nonlinear optimal control problems. This optimal approach contains at most three convergence-control parameters and is computationally rather efficient. A kind of averaged residual error is defined. By minimizing the averaged residual error, the optimal convergence-control parameters can be obtained. This optimal approach has general meanings and can be used to get fast convergent series solutions of different types of equations with strong nonlinearity. The closed-loop optimal control is obtained using the Bellman dynamic programming. Numerical examples are considered aiming to demonstrate the validity and applicability of the proposed techniques and to compare with the existing results.

scholarly journals DGM 430 OFFSET WEB MACHINE PRINT QUALITY

KREATOR ◽  
2021 ◽  
Vol 2 (2) ◽  
Author(s):  
Maulana Ibrahim ◽  
Anton Hadiwibowo ◽  
Mukhyidin Djaiz ◽  
Henra Nanang Sukma
Keyword(s):  
Quality Parameters ◽  
Quality Level ◽  
Print Quality ◽  
Control Parameters ◽  
Machine Material ◽  
Control Activity ◽  
Cultural Arts ◽  
Digital World ◽  
Quality Control Parameters

The review control activity, especially the decrease in the quality of the printed output, is one of the quality control parameters carried out by each company. To get quality, of course, the company does not remain silent, there are several things that need to be done or provided by the company to be able to support quality, namely man (human), machine (machine), material (material), and methods (methods). In the development of technology in an increasingly advanced digital world, companies want to continue to compete with a digital world by making breakthroughs, this of course makes the products produced by the company have a good or good quality level. In this study, there is an identification of the problem aspects that arise from the causes of the print results and how to get solutions to overcome the problems and factors that affect the quality of the print on the printed contents of the Cultural Arts Service Book using the DGM 430 Web Offset machineKeywords— Quality, Parameters, Web Offsets

scholarly journals Simulation study of droplet formation in inkjet printing using ANSYS FLUENT

2022 ◽  
Vol 2161 (1) ◽  
pp. 012026
Author(s):  
Neha Thakur ◽  
Hari Murthy
Keyword(s):  
Ethylene Glycol ◽  
Simulation Model ◽  
Inkjet Printing ◽  
High Viscosity ◽  
Droplet Formation ◽  
Nozzle Diameter ◽  
Print Quality ◽  
Ansys Fluent ◽  
Low Viscosity ◽  
Inkjet Printer

Abstract Flow simulations of jetting of inkjet drops are presented for water and ethylene glycol. In the inkjet printing process, droplet jetting behaviour is the deciding parameter for print quality. The multiphase volume of fluid (VOF) method is used because the interaction between two phases (air and liquid) is involved in the drop formation process. The commercial inkjet printer has a nozzle diameter of ∼73.2μm. In this work, a simulation model of inkjet printer nozzles with different diameters 40μm, 60μm, and 80μm are developed using ANSYS FLUENT software. It is observed that when water is taken as solvent then the stable droplets are generated at 60μm nozzle diameter till 9μs because of its low viscosity. For higher diameter, the stamen formation is observed. Ethylene glycol stable droplets are achieved at 80μm nozzle diameter till 9μs because of their high viscosity (∼10 times that of water). Along with the droplet formation, the sustainability of the droplet in the air before reaching the substrate is also important. The simulation model is an inexpensive, fast, and flexible alternative to study the ink characteristics of the real-world system without wasting resources.

scholarly journals Program complex for optimization of surface hardening of steel billets

2021 ◽  
Vol 29 (2) ◽  
pp. 129-144
Author(s):  
Anton V. Popov ◽  
Yulia E. Pleshivtseva
Keyword(s):  
Control Algorithm ◽  
Induction Hardening ◽  
Control Problems ◽  
Control Parameters ◽  
Program Complex ◽  
Alternance Method ◽  
Flux Model ◽  
Transcendental Equations ◽  
And Control ◽  
Develop Program

The aim of the paper is to develop program complex in software MATLAB with integrated numerical 2D nonlinear FLUX model, which is used for solving optimal inductor design and control problems for heating stage of surface induction hardening. Considered program complex is based on alternance method, that allows to write systems of transcendental equations, closed with respect to all unknown design and control parameters of the process. The suggestion for implementation of obtained optimal control algorithm is presented.

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