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Points To Consider As How to Create a Block in AutoCAD

Posted by: Hi-Tech | Posted on: December 27th, 2012

The AutoCAD blocks are a tool or an object in which different geometries are being collected together. These blocks can be used repeatedly in the drawings. The advantages of using blocks are that; in addition to using them repeatedly, users can insert them in other drawings too.

Moreover, the blocks take up less electronic space in comparison to the individual objects. So, the drawing files developed are relatively smaller in size. In addition, a user can update all the blocks in a drawing by only modifying a single block definition.

In this particular article, we will discuss the steps as how to create a block in AutoCAD effectively, but before that let’s check out some more details about the blocks.

Parts of the Block

An AutoCAD block has two basic parts known as a block definition and a block instance. The block definitions are stored in the particular drawing files. The copies of the block are known as the block instances. A block definition can be accessed via any instance of the block.

The block definition contains different types of entities such as lines, circles, arcs, texts and other blocks too. Whenever a user is editing a block, s/he is actually modifying the block definitions and as a result, all the instances of the block will be updated automatically.

Blocks are also comprised of attributes, which in turn contains essential information. The information contained in the attributes can be different for the different instances of the block. A user can extract the information contained in the attributes to any table or excel sheet to perform other necessary information such as preparing a schedule or developing the bill of materials.

Points to consider before creating the AutoCAD block

Here are some of the key points a user should note while creating the blocks:

•    Whenever the user wants to retain the original properties of any of the entities of the block, then s/he should put the entities in any layer other than Layer 0. In addition, the user should not set the properties of the object to ‘BYBLOCK’ or ‘BYLAYER’.
•    If in case, a user wants to let the entities inherit their properties from the current layer, then s/he should put the entity on Layer 0 and should also set the properties of the object to ‘BYLAYER’.
•    If a user wants to let the entities of the object change independently, then s/he can put the entities on any layer and should set the properties of the object to ‘BYBLOCK’.

Steps of creating AutoCAD block in Block Editor

Here are the basic steps to create a block in AutoCAD:

1.    Draw the objects to be included in the block.
2.    To start the BLOCK command, choose Home tab> Block panel> Create. The Block Definition dialog box will open.
3.    Specify the name in the text box. Specify the base point by clicking on ‘Pick Point’ in the Base Point section. This is the point where the block is to be inserted.
4.    To select the object, click the ‘Select Objects’ button in the Objects section.
5.    Choose the block unit in the ‘Settings’. Users can also add a hyperlink depending upon requirement.
6.    Add description to the block in the Description box.
7.    Click OK to complete the box.

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