Written by Cindra Drowne-Walsh
Block: is a collection of selected entities that has a defined insertion point and combines all entities into a single group with an assigned a name . *This is created in the drawing and is accessible only within this drawing.
Why create Blocks: Blocks are a great option to use – they consolidate the drawing size, keep consistency within drawings and projects, saves time as the items do not need to be drawn every time (just inserted) and they are easily modified and will update all instances withn=in the same drawing when modified. “ WBlock the Block if you want to save it into a directory for all to have access to the block at any time. This is the best idea.”
Steps to create a Block:
- Select the Create Block button: This is located in the Insert Tab, Block Definition Panel – Create Block Button.
2. This opens up the Block Definition Dialog box. Here you assign a Name, Select a Base Point, Select the geometry – annotation (select all that needs to be part of the Block) to be included in the block.
Here you define the name of the Block. It is preferred as with drawing names to
keep them descriptive but not too long.
B: Base Point:
There are three options to define the Base point to the geometry.
1st options is to select the box which places a check mark in it. When you select OK it will them bring you out into the drawing and prompt you to select the Base Point.
2nd option is the Pick Points button: Once this button is selected it brings you into the drawing to select the desired Base Point.
3rd option is place define the location in the X, Y, Z (if applicable) areas in the dialog box.
*The Base Point also known as the Handle is where the Blocks insertion point is. Defining a good base point makes the insertion of the Block much easier. Think of what is being inserted and how it relates to other geometry. Such as this Sink I used Object Tracking to reference it 2.5” away from the mid-point of the back of the sink. This allows the sink to be inserted at a reference point such as a counter and it will be placed in correctly and no need to relocate.
There are two ways to select the geometry to be included into the block.
1st options is to select the box which places a check mark in it. When you select OK it will then bring you out into the drawing and prompt you to select the Objects.
2nd Select the Select Objects button, this brings you into the drawing to select what is to be included into the Block.
Options within this section:
Retain if selected it creates the Block but does not convert the selected entities into a Block they remain as they are.
Convert to Block if selected this creates the Block and converts the selected entities into a Block and it remains visible in the drawing.
Delete if selected creates the Block but deletes the selected entities from the drawing.
Annotative – allows the Block being inserted to adjust per the View Port Scale Factor.
Scale uniformly – keep the Block from being inserted at a different X and different Y scale.
Allow exploding – this option should be selected if the block may needs to be modified at a later time, and if the Open in Block editor is not selected you won’t be modifiable.
E: Block Units:
Here are many options to choose from. This option is important to define if you create the blocks in one form of Units and then insert the block into another drawing using another form of Units. Ex. Create Block in Inches but it will be inserted into a drawing using Kilometers.
Describe the block.
G: Open in Block Editor:
With this selected it will open in the Block Editor allowing additional modifications to the Block.
3rd Select OK and the Block has been created and is available within this drawing only.
Creating a Block: Note the block is created on Layer 0 (zero)
Inserting the Block: Notice the Block takes on the properties of the current Layer and the insertion point is attached at the cross hairs.
Things to keep in mind when creating Block:
*The preferred method -create Blocks on Layer 0 (ZERO) – this is the layer that when you start with any AutoCAD template file it is available. When created on Layer 0 the Block will adjust per the Layer properties and will then be able to represent different options per the Layer properties.
Ex. If the Block is placed on another layer (other than Layer 0) and the properties are different those properties will be reflect in that instance of the Block.
Layer 0 the Properties are color White and a Solid Linetype.
Layer Hidden the Properties color Red with a Hidden Linetype.
**Blocks inserted on Layer Zero will reflect the properties of that Layer which is White with a Solid Linetype, The same Block inserted in the same drawing on the Hidden Layer the Block will reflect those Layers properties, Red with a Hidden Linetype.
Blocks can be created on any other layer – keep in mind when a block is created on any other layer the properties won’t update when placed onto a different Layers. There are cases that this approach would be needed.