3D PRINTER

What is 3D printing?

3D printing or additive manufacturing is a process of making three dimensional solid objects from a digital file.The creation of a 3D printed object is achieved using additive processes. In an additive process an object is created by laying down successive layers of material until the object is created. Each of these layers can be seen as a thinly sliced horizontal cross-section of the eventual object.

3D printing, also known as additive manufacturing (AM), refers to processes used to synthesize a three-dimensional object in which successive layers of material are formed under computer control to create an object. Objects can be of almost any shape or geometry and are produced from digital model data 3D model or another electronic data source such as an Additive Manufacturing File (AMF) file.

Modelling

3D printable models may be created with a computer-aided design (CAD) package, via a 3D scanner, or by a plain digital camera and photogrammetry software. 3D printed models created with CAD result in reduced errors and can be corrected before printing, allowing verification in the design of the object before it is printed.

CAD model used for 3D printing

The manual modeling process of preparing geometric data for 3D computer graphics is similar to plastic arts such as sculpting. 3D scanning is a process of collecting digital data on the shape and appearance of a real object, creating a digital model based on it.

Finishing

Though the printer-produced resolution is sufficient for many applications, printing a slightly oversized version of the desired object in standard resolution and then removing material with a higher-resolution subtractive process can achieve greater precision.
Some printable polymers such as ABS, allow the surface finish to be smoothed and improved using
chemical vapor processes based on acetone or similar solvents.
Some additive manufacturing techniques are capable of using multiple materials in the course of constructing parts. These techniques are able to print in multiple colors and color combinations simultaneously, and would not necessarily require painting.

Some printing techniques require internal supports to be built for overhanging features during construction. These supports must be mechanically removed or dissolved upon completion of the print.
All of the commercialized metal 3D printers involve cutting the metal component off the metal substrate after deposition. A new process for the GMAW 3D printing allows for substrate surface modifications to remove aluminum or steel.

How to make Homemade Latern

Lantern

A lantern is a portable lighting device or mounted fixture used to illuminate areas. Lanterns may also be used for signaling, as torches, or as general light sources outdoors. Low light level varieties are used for decoration. The term "lantern" is also used more generically to mean a light source, or the enclosure for a light source. Examples are glass pane enclosed street lights, or the housing for the top lamp and lens section of a lighthouse.The term is commonly associated with Chinese paper lanterns.

History

Decorative lanterns exist in a wide range of designs. Some hang from buildings, while others are placed on or just above the ground. Paper lanterns occur in societies around the world. Modern varieties often place an electric light in a decorative glass case.

The ancient Chinese sometimes captured fireflies in transparent or semi-transparent containers and used them as (short-term) lanterns. Raise the Red Lantern, a Chinese film, prominently features lanterns as a motif. Lanterns are used in many Asian festivals. During the Ghost Festival, lotus shaped lanterns are set afloat in rivers and seas to symbolic guide the lost souls of forgotten ancestors to the afterlife. During the Lantern Festival, the displaying of many lanterns is still a common sight on the 15th day of the first lunar month throughout China. In other Chinese festivities, the kongming lanterns can be seen floating high into the sky during Chinese festivities. Lanterns are the central theme of the Seoul Lantern Festival, too.

How to make Chocolate Cake

Ingredients

• 2 cups sugar
• 1-3/4 cups all-purpose flour
• 3/4 cup HERSHEY'S Cocoa
• 1-1/2 teaspoons baking powder
• 1-1/2 teaspoons baking soda
• 1 teaspoon salt
• 2 eggs
• 1 cup milk
• 1/2 cup vegetable oil
• 2 teaspoons vanilla extract
• 1 cup boiling water
• "PERFECTLY CHOCOLATE" CHOCOLATE FROSTING (recipe follows)
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Directions

• 1. Heat oven to 350°F. Grease and flour two 9-inch round baking pans.
• 2. Stir together sugar, flour, cocoa, baking powder, baking soda and salt in large bowl. Add eggs, milk, oil and vanilla; beat on medium speed of mixer 2 minutes. Stir in boiling water (batter will be thin). Pour batter into prepared pans.
• 3. Bake 30 to 35 minutes or until wooden pick
  inserted in center comes out clean. Cool 10 minutes; remove from pans to wire racks. Cool completely. Frost with "PERFECTLY CHOCOLATE" CHOCOLATE FROSTING. Makes 12 servings.
• VARIATIONS:
• ONE-PAN CAKE: Grease and flour 13x9x2-inch baking pan. Heat oven to 350° F. Pour batter into prepared pan. Bake 35 to 40 minutes. Cool completely. Frost.
• THREE LAYER CAKE: Grease and flour three 8-inch round baking pans. Heat oven to 350°F. Pour batter into prepared pans. Bake 30 to 35 minutes. Cool 10 minutes; remove from pans to wire racks. Cool completely. Frost.
• BUNDT CAKE: Grease and flour 12-cup fluted tube pan. Heat oven to 350°F. Pour batter into prepared pan. Bake 50 to 55 minutes. Cool 15 minutes; remove from pan to wire rack. Cool completely. Frost.
• CUPCAKES: Line muffin cups (2-1/2 inches in diameter) with paper bake cups. Heat oven to 350°F. Fill cups 2/3 full with batter. Bake 22 to 25 minutes. Cool completely. Frost. About 30 cupcakes.
• "PERFECTLY CHOCOLATE" CHOCOLATE FROSTING
• 1/2 cup (1 stick) butter or margarine
• 2/3 cup HERSHEY'S Cocoa
• 3 cups powdered sugar
• 1/3 cup milk
• 1 teaspoon vanilla extract
• Melt butter. Stir in cocoa. Alternately add powdered sugar and milk, beating to spreading consistency.
• Add small amount additional milk, if needed. Stir in vanilla. About 2 cups frosting.