Creating a Custom Diffuser Callout

This section describes how to create a custom diffuser callout.

How to Create the Callout Block

To create the callout block, you need to open the drawing file you want to use as the callout. If the callout already exists as a block, open that file. If it does not exist, you can open the "dm_hvac-diffusercallout.dwg" file in your HVAC customization folder and modify that file.

Scale the entities in the drawing so that everything is the size it should appear when printed on paper. If you want your text 1/10″ high, it should be 0.1 units high in the drawing. If you want the callout to be 1″ wide, it should be 1.0 units wide in the drawing.

Determine the locations where leaders should connect to this block. If the leader is pointing left, it will start at the location we will call “leader left.” If the leader is pointing right, it will start at the location we will call “leader right.”

diffuser-callout-leader-left-right

Move the leader left point to 0,0.

Create an attribute with a TAG set to WIDTH. This attribute will control the location that a leader pointing right is inserted. Measure the distance between leader left and leader right. Set the PROMPT and DEFAULT values for the attribute to this width.

Use the properties command and set the WIDTH attribute to be invisible. It does not matter where this attribute is located on the drawing.

Use the base command and set the base point for the drawing to 0,0.

There are three attributes that will be filled in with information on the drawing, CFM, CALLOUT, and NECK. Your callout can contain these attributes, but none of them are required. Set the TAG, PROMPT, and DEFAULT value to the name of the attribute (either CFM, CALLOUT, or NECK). Set the text style and height on the attribute. These values will not be changed when the callout block is inserted on the drawing.

Save the drawing file as “dm_hvac-diffusercallout.dwg” to your HVAC customization folder.

Using the Block in New Projects

To use the callout block in new projects, set the Diffuser Callout option to Custom Block in the Options->Edit Standards List command

Using the Block in Existing Projects

To use the callout block in new projects, set the Diffuser Callout option to Custom Block in the Options->Edit Project List command

Use the Redefine Block in this Drawing command and select a diffuser callout already on the drawing.

Insert a new diffuser on the drawing and confirm that the callout looks correct. Move the callout using the Insert or Move Callout command and make sure that the leader is working correctly. Erase this new diffuser if you do not need it in the project.

Run the Coordinate Drawings and Database command to update the callouts for diffusers already inserted on the drawing.


Page url: http://www.designmaster.biz/docs/hvac/index.html?creating_custom_diffuser_callout.htm
©2012-2013 Design Master Software, Inc