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Defpoints Layer

August 6, 2009 in AutoCAD, CAD, Revit

old_fabric_1 When you create a new AutoCAD file, can you see this layer? No, unless your template file has it defined. This layer will be created automatically by AutoCAD when you create dimension. Try to create a dimension, then look again in your layer list. What is this layer for?

This layer is used for definition points when you place dimensions in AutoCAD. This layer by default is set not to be plotted. Don’t mind this layer. Why worry about one layer when you can create virtually unlimited layers?

The problem is, many use this layer when creating objects they don’t want to plot. Viewports for example. This is practical before, we can’t define a no-plot layer. Now that we can create a no-plot layer, we should avoid using this. Why?

Layer defpoints is somehow linked to Layer 0. When we freeze or thaw layer 0, you can’t modify objects in layer defpoints. You probably know it, but someone who receive your file might not.

The other reason is, when you run audit, all objects that’s not definition points will be removed to a new layer: $AUDIT-BAD-LAYER. You can read the explanation here. There is no explanation whether this will make your files corrupted or not. But if audit treat it as ‘bad object’ then it must be a good reason for it. You don’t want to see the ‘deadly’ fatal error message, do you?




Source: CAD Notes – Defpoints Layer
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Using Baseline Dimension

July 22, 2009 in AutoCAD, CAD

A multi-faceted object on your drawing, will consumed most of your time dimensioning it, if you don’t know the techniques, or the commands that can be use to dimension it continuosly and automatically.

Just in case you encounter such object in your drawing, you can use the command Baseline Dimension and Continue Dimension. You can find these commands, under Dimension Pulldown menu, or at the Dimension Toolbar. Alternatively at the command prompt, type DIMBASELINE or DIMCONTINUE.

baseline_dimension_toolbar

Baseline Dimension or DIMBASELINE, is a AutoCAD command that creates multiple dimension measured from the same baseline. While Continue Dimension or DIMCONTINUE, is an AutoCAD command that creates a multiple dimension placed end to end.  To create a baseline dimension continued dimension you should create first a linear, aligned, or an angular dimension to serve as a starting point, or click any extension line from any existing dimensions from your drawing.

baseline_dimension

Baseline Dimension

Continue Dimension

Continue Dimension

 

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Source: PinoyCAD[dot]net | Your Daily dose of AutoCAD Tutorials – Using Baseline Dimension
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using Dimension Space

July 22, 2009 in AutoCAD, CAD

Dimension presentation is vital in a drawing, a drawing plans cannot be use if the dimension is not readable. Thats why it is important for us AutoCAD Drafters and Architects that we assure that, the dimensions are shown in a nice and in a readable way. But sometimes, in an unavoidable situation like rushing up yourself to finish your drawing and eventually making it to submission day. This is the time when your drawing presentation might suffer, specially the dimension presentation.

Goodthing, AutoCAD has this routine, that can automatically adjust existing parallel linear and angualr dimension in a drawing, so they are equally spaced or aligned at the dimension line with each other.

dim_space_toolbar

(fig.1)

This routine called, the Dimension Space, or DIMSPACE, you can find this routine at the Dimension Pulldown menu, Dimension Space, you can also find it at the dimension toolbar (fig.1). Alternatively, at the command prompt, type DIMSPACE, then ENTER, then select the dimensions you want to adjust. The dimension that to be selected must be linear or angular, of the same type (rotated or aligned), parallel or concentric to one another, and on the extension line of each other. See the example below (fig.2 and fig.3).

dim_space1

(fig.2)

dim_space2

(fig.3)

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Source: PinoyCAD[dot]net | Your Daily dose of AutoCAD Tutorials – using Dimension Space
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How to Add Breakline Symbol in Dimension Line

July 22, 2009 in AutoCAD, CAD

How to add a breakline symbol to a dimension line?, that’s the question. Sometimes in a AutoCAD Draftsman’s career, they will encounter such drawing that has an object that needs to be shown with breakline symbol in order to fit the drawing inside the drawing area. And ofcourse a drawing cannot be called as a working drawing if the drawing has no Annotations, Title, and specially if no Dimensisons.

In a drawing that has an object that shown with breakline symbol, it is recommended that it must come up also with a dimensioning with a breakline symbol or jog symbol. And that’s the time, the command DIMJOGLINE will be needed. You can find the DIMJOGLINE command at the Dimension Toolbar, or at the Dimension pulldown menu, Jogged Linear. Alternatively, you can just type DIMJOGLINE at the command prompt.

dim-toolbar-jog

DIMJOGLINE is an AutoCAD command that can create a breakline symbol like object, that can be use in a linear dimension line. Jog symbol are used to represent a dimension value that does not the actual measurement of an object. Typically, the actual measurement value of the dimension is smaller than the displayed value. Once you already made the JOG symbol you can modify it’s position by using GRIPS.

dimension_jog

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Source: PinoyCAD[dot]net | Your Daily dose of AutoCAD Tutorials – How to Add Breakline Symbol in Dimension Line
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