Nail Arts  for Beginners          

01. Speckled Bird Egg

02. Galaxy

 03. Frame

04. Neon

05. Blue Marble

06. Snow

07.Polka Dots

08. Beach Waves

09. Minimalist

10. Melted

Solid works

Solid works 

Modules in Solid Works

Solid Works extends design applications through full integration with best-in-class solutions. The following modules will be discussed.

• Part Modeling
• Assembly Modeling
• Surface Modeling
• Sheet Metal Design
• Drawing

1) Part Modeling

This module produces parts easily and rapidly by creating features such as extrudes, revolves, thin features, sweeps, advanced shelling, feature patterns and holes. The 3D part is the basic building block of the Solid Works mechanical design software. In Solid Works you can design a part by sketching its component shapes and defining their size, shape and inter relationships. By successfully creating these shapes, called features, you can construct the part. The basic modeling process for each part is as follows:

• The Plan the part
• Create the base feature
• Create the remaining features
• analyze the part
• Modify the features as necessary

Solid Works speeds up part modeling with unique feature level control over multiple bodies.

2) Assembly Modeling

Assembly design gives a user the ability to design with user controlled associability. Solid Works builds these individual parts and sub-assemblies into an assembly in a hierarchical manner. This is based on the relationships denied by the constraints. Solid Works assembly designs reference parts directly and maintains relationships when creating new parts. In the assembly module, you can perform physical simulation and mechanical interaction between the parts and avoid any potential design flaws.

3) Surface molding

For designing dies, castings or injection molds, surface modeling capability is important, Solid Works Surface module can create complex models from free form shapes. You can create complex surfaces using lofts and sweeps with guide curves, drag-handles for easy control and innovative surface features. The basic process to create the
surface model is as follows:

• Acquire the wireframe model
• Study the wireframe model
• Create and verify the required surface
• Output the surface model

Motor Starting Methods

Motor Starting Methods

• Direct on line starting method
• Star Delta starting method
• Rotor resistance starting method
• Variable speed drive starting method

Star Delta starting method

This method is used more often in the factory. If it is necessary to limit the starting current of the motor due to power limitations. It is possible to use Star-Delta. From there begins a connected winding star to connect the motor to the delta. The starting current used in this method reduces the starting current to about 30% of the direct inline start value, and the starting torque is reduced to about 25% of the value using the direct inline start method. Good torque / current performance, relatively inexpensive starter are the advantages of this method. The disadvantages are low starting torque, no adjustment, power failure during connection change and 6 required end motors.

ARDUINO MEGA 2560 REV3

ARDUINO MEGA 2560 REV3

 

Overview

The Arduino Mega 2560 is an ATmega2560-based microcontroller board. It has 54 digital I / O pins (15 can be used as PWM outputs), 16 analog inputs, 4 UART ports, 16 MHz crystal oscillator, USB port, power socket, ICSP head and reset button. It contains everything needed to support the microcontroller. Just connect it to a computer with a USB cable or plug it into a power adapter or battery to get started. The Mega 2560 is compatible with most shields designed for the Uno and the former boards

Specification

Microcontroller	ATmega 2560
Operating Voltage	5V
Input Voltage (recommended)	7-12V
Input Voltage (limit)	6-20V
Digital I/O Pins	54 (of which 15 provide PWM output)
Analog Input Pins	16
DC Current per I/O Pin	20 mA
DC Current for 3.3V Pin	50 mA
Flash Memory	256 KB of which 8 KB used by boot loader
SRAM	8 KB
EEPROM	4 KB
Clock Speed	16 MHz
LED_BUILTIN	13
Length	101.52 mm

Arduino-Uno

Arduino-Uno

overview 

UNO is the perfect microcontroller to get started with electronics and coding. If it's the first time you play with the electronic platform, UNO is the strongest board you can start playing on. ONE is the most used and documented painting of the Arduino family.

Arduino Uno is a microcontroller card based on ATmega328P (data sheet). There are 14 digital I / O pins (6 of which can be used as PWM outputs), 6 analog inputs, 16 MHz crystal, USB connection, power connection, ICSP connector and reset button. Everything you need to support a microcontroller is included, connecting to a computer with a USB cable or turning on with an AC-DC adapter or battery to get started. Spend a few dollars on the tip and start again.

specification 

Microcontroller	ATmega328P
Operating Voltage	5V
Input Voltage (recommended)	7-12V
Input Voltage (limit)	6-20V
Digital I/O Pins	14 (of which 6 provide PWM output)
PWM Digital I/O Pins	6
Analog Input Pins	6
DC Current per I/O Pin	20 mA
DC Current for 3.3V Pin	50 mA
Flash Memory	32 KB (ATmega328P) of which 0.5 KB used by boot loader
SRAM	2 KB (ATmega328P)
EEPROM	1 KB (ATmega328P)
Clock Speed	16 MHz
LED_BUILTIN	13
Length	68.6 mm
Width	53.4 mm
Weight	25 g

SWITHGEAR AND PROTECTION

FAULT AND ABNORMAL CONDITIONS

The abnormality conditions may exist in a power system due to following reason

•     Operational fault work fault
•       system or network fault 

Structure of DC servo drives

c   1.Closed loop drives

There are two system structures

o   direct current limit structure

o   inner current –loop structure

current limit (Ip) is set by the user and its specified upper limit for transient power current limit action grantees that armature current Ia will not exceed (Ip)