The goal of this experiment is to prove the following hypothesis: A pointing task performed by a blind user on a vibrating touch-screen is not affected by the angle between the source and the target points, following Fitts' Law. ... which concurs with Fitt's Law: given that angle variation is not a parameter in Fitt's mathematical model. ...

For example, the paper [1] investigates the possibilities of changing the vibration direction angle of the elliptical vibrating screen driven by two motors. The rectilinear oscillations of the ...

The vibrating screen's geometrical parameters include the overall length and width of the screen as well as the screen deck angle – horizontal, inclined or declined or even multi sloped – along with the …

Vibrating screens are critical machines used for size classification in mineral processing. Their proper operation, including accurate vibration movement and slope angle, can provide the benefits of energy savings and cost reductions in the screening process and the whole mining process. Dynamic models of the vibrating screen movement available in …

High-frequency vibrating screen is usually operated at an inclined angle 0°-25°, up to 45°, and the operating frequency range is 1500-7200r/m. 7. Grizzly Screen. Grizzly screen is often used for pre-screening before coarse and medium crushing of materials. The mesh size is generally >50mm, but sometimes <25mm.

Hou et al. [11] studied the migration law of solid particles on the negative pressure drilling fluid vibrating screen, and analyzed the influence of the negative pressure system on the structural ...

Inclined screens are the most basic type of screen, fixed to an inclined frame at an angle of between 15° and 30°. The entire body of the screen vibrates on helical springs circularly with the same characteristics and material flow is supplied by gravitational acceleration. The slope of the inclined screen is fixed, although the stroke can be ...

The present studies for the screening theory of granular materials mainly focus on simulating the screening process by using the discrete element method (DEM), the screening experiment for choosing optimal vibrating parameters (amplitude, frequency, inclination angle, etc.), the trajectory of particles bouncing on a vibrating screen and …

The vibration characteristics of the screen deck and the forces acting on an individual particle are exhibited in Figure 3, where α denotes the inclination angle of screen deck, a and b are respectively the length of semi-major axis and the semi-minor axis of the elliptical trace, θ is the vibration direction angle, ω is the angular velocity ...

law of angle on a vibrating screen mineminingPrinciple and maintenance strategy of horizontal vibrating. law of angle on a vibrating screen Online Service Download PDF Springer of the exciting force did not act through the centroid of screen box The horizontal vibrating motor is a vibration source which combines the power source and the ...

A vibrating screen is a device for sorting materials, which is widely used in screening plants. The working ability of a vibrating screen relies on various parameters, such as dynamic parameters ...

quality of the vibrating screen. Vibrating screen: the source of vibration is the centrifugal force generated by the rotation of a group of eccentric blocks, thus driving the vibration of the screen box supported by two groups of springs. In the screen box, the particles of more than 80 mm are removed from the screen plate supported by three

Above all many parameters of banana screen such as incline angle, vibrating direction angle and so on can be adjusted and the structure is widely used in bolt fixing type. The vibrating screen was presented in Fig. 4, and Fig. 5 showed that the vibrating motor is installed on the mounting rack to provide exciting force.

Generally, the screening body of a vibrating screen usually oscillates in a simple harmonic motion. Assuming the vibration equation of screen body with respect to time t is y s (t) = D sin ω t, where D is the vibration amplitude and ω is the vibration circular frequency. The included angle between the vibration direction of screen body and ...

Generally, we suggest that the inclination angle of the linear vibrating screen is 0-15°. If special materials are to be screened, the inclination angle can be increased appropriately, but it should not exceed 25°. 4. Motor excitation force: must be higher than 30% of the total weight of the linear screen.

1. The working principle of linear vibrating screen. The working principle of the linear vibrating screen is that the shafts of the two vibrating machines have an inclination angle relative to the screen surface. Under the combined force of the exciting force and the material's self-gravity, the material is thrown up and jumping forward on ...

The vibration characteristics of the screen deck and the forces acting on an individual particle are exhibited in Figure 3, where α denotes the inclination angle of screen deck, a and b are respectively …

The tilt angle of the screen is defined as the angle between the screen and the horizontal plane. It is one main factor that determines the penetration probability of particles and the screening performance of the vibrating screen (Dong and Yu, 2012, Wang and Tong, 2011, Xiao and Tong, 2013, Zhao et al., 2010).In the literature, the motion of …

First, numerical simulation of the screening process based on EDEM software was carried out, and the influence of vibration frequency, amplitude and direction angle of vibration on the screening ...

In order to study the law of vibrating screen further, let the starting phase angles be zero after all axes are fixed following the requirements of design, and then get the form of …

The vibrating direction angle of the linear vibrating screen ranges from 30 to 60°, often 45°. This value not only has good performance for various screening but also obtains the best moving speed and high productivity. circular vibrating screen. 3. The amplitude A amplitude increases, the mesh plugging phenomenon will be greatly …

Vibrating screen is the key screening equipment in coal cleaning. With the increase in coal production, vibrating screen with large processing capacity, high reliability, and excellent screening effect is essentially required. ... and the influence law of amplitude, frequency, inclination angle, and vibration direction angle on evaluation ...

frequencies on the phase angle and the vibration direction angle. The results of simulation and experiments shows that vibrating screen driven by the two motors can not only achieve a stable ...

The variable elliptical vibrating screen (VEVS) trajectory is regulated to adapt the material mass along the direction of the screen length, improving the particles distribution as well as the screening efficiency. In this work, a theoretical model was developed for analyzing the screen surface motion law during VEVS-based screening …

angle, vibration direction angle, vibration amplitude, and vibration frequency. These influence factors are common in studying screening properties of other kinds of vibrating screen in [ 1 – 3 ...

For materials that are difficult to screen the vibration frequency and amplitude, the screen-deck inclination angle and the vibration angle should be set to 14 Hz, 6.6 mm, 6° and 40 ...

For easy-screen materials, the vibration direction angle should be small; in general, the vibration direction angle of the circular vibrating screen is 90°. The …

The variable elliptical vibrating screen (VEVS) trajectory is regulated to adapt the material mass along the direction of the screen length, improving the particles …

In this work, an attempt has been made to screen the coal of size −2 + 1 mm from −3 + 1 mm using a 2 mm screen mesh in the vibrating screen generated at different moisture content, angle, and ...