24a. SCALE in AutoCAD

SCALE in AUTOCAD

NOTE! The AutoCAD drawing sizes in reality (the true value of length) and the drawing is printed at the scale of print.

I have long prepared for this part of the web AutoCAD tutorials and wondered how to explain the SCALE concept for beginner and work with the SCALE in AutoCAD. I went through a lot of internet and reviewed some literature to explain but everyone in their own way and quite differently. In principle, even with some explanations (for the brevity of the text) it was difficult to explain how it works the way explained.

So I will try to find of all seen what the most affordable beginner (as I see the Scale in AutoCAD). If you pass this web AutoCAD tutorial from the beginning of a link by link I hope that you will not be difficult to understand (but if not then I do not know ;-)

Firstly in the beginning of this web AutoCAD tutorials I mentioned that before the drawing is necessary to set up - set up certain units.

UNITS in AutoCAD

It is enough to start drawing. Furthermore, when drawing a Draw with the value of units. So if you draw in millimeters then they will also be 1 mm in drawing 1 unit, 1 cm will be 1 unit or 1 m will be 1 unit. And while plotting to set up a measure that would stop you drawing on paper.



Add specific Scale in the drop-down menu work with the command SCALELISTEDIT Prompt the Command Line.
Command entry Scalelistedit
Scale Viewports

You can also use the toolbar Viewports (pictured above) in dealing with LAYOUT the MODELSPACE then via a drop-down menu to choose the criteria for the best view on the paper when printing on the printer (plotter).

SCALE MODEL in mode (MODELSPACE)

Displaying art in drawing, we can zoom in and out using the mouse wheel (PAN) and the scale when working in Model (MODELSPACE) can be adjusted via certain commands in the Command Prompt Line. But again it all depends on the settings. If you draw in millimeters and the ratio was 1 unit of 1 mm, then these commands below apply, but if you draw in meters of the actual size of this value will then be rolled underneath.

In Mechanical Engineering are most often used the following criteria:
impairment => 1:2.5, 1:5, 1:10, etc. .. (1 unit = 1 mm)
for to enlarge => 2:1, 5:1, 10:1, etc. .. (1 unit = 1 mm)
In construction are most often used the following criteria: 1:500, 1:100, 1:50 etc.. (1 unit = 1 cm)
In geodesy are commonly used following scale: 1:1000, 1:1400, 1: 2000, 1:2500, 1:5000 (1 unit = 1 m)

For example, I will show this drawing below. The first picture is the view of the drawing of 1:1. But if the Command Prompt Type the following command line

Command: Z [zoom ]
ZOOM
Specify corner of window, enter a scale factor (nX or nXP), or
[All/Center/Dynamic/Extents/Previous/Scale/Window/Object] <real time>: 1/1xp
 
Scale 1:1 in AutoCAD

If now again in the Command Line Prompt type this command

Command: Z [zoom ]
ZOOM
Specify corner of window, enter a scale factor (nX or nXP), or
[All/Center/Dynamic/Extents/Previous/Scale/Window/Object] <real time>: 1/2xp
Scale 1:2 in AutoCAD

If you are now entering the first command again, the drawing will be increased. This method of magnification (zoom) is used in geodesy (and given that I have knowledge in other fields, here I will show the scale of Geodesy, remember that the units for surveying meters)

So when PLOT drawing in geodesy have some sort of file on which the drawing is a cadastral district and if you want a chance you Plot in operation LAYOUT => MODELSPACE shifted Occasionally wheel (zoom) Drawing using these commands, you can return to a scale that you need.

1:500 => 2/1xp
1:1000 => 1/1xp
1:2000 => 1/2xp
1:5000 => 1/5xp

Unlike the above you still have options and I will here give only examples of the scale and you use them where you need it.

1:250 => 4/1xp
1:750 => 3/2xp
1:1500 => 2/3xp
1:2500 => 2/5xp

As a decimal number in such a way that is, determining the zoom scale does not apply here is an example of how to determine Scale.

1:2,5 => 10/25xp (ie. move comma and the relationship we have figures for scale)

If you use the Viewports toolbar and then it can eg write 1:5 => 0.2

The text above the little I have explained how it can scale to look at drawing in Model-in.

Scale Printing in AutoCAD (Plotting)

Plot/Print scale should always be determined (ie planned) before drawing because we treated him to act when we determined the size of the text on the drawings and other elements of the listing. But about this later on this Blog.
Let the size of the drawing be on the paper enlarged or reduced or in the same size as we have drawn.
In general we can say that the SCALE ratio of some size is drawn on paper (V on paper) and the same size in reality (V in reality)

Formula for SCALE
Formula for SCALE
If the actual size of the drawing is reduced then the relation Mj <1. The metric is displayed by means of a break (or a divisor sign) where in numerator 1 a in the denominator is the reduction factor M.

Formula to Reduction Scale
Formula to Reduction Scale
If the actual size of the drawing is increased, then the relation Mj> 1. The scale is displayed by means of a break (or a divisor sign) where the numerator is a factor of an increase of Na in denominator number 1. (Such scales are often used in Enlargement Engineering)

Formula for Increase Scale
Formula for Increase Scale
PAPER SIZE:

- A0 => 841 x 1189
- A1 => 594 x 841
- A2 => 420 x 594
- A3 => 297 x 420
- A4 => 210 x 297

Please see tutorial numbered No. 28 on Home-Content and see 'List all dimensions and size sheet of paper'. 

Here are the reasons why it is important to determine the SCALE before printing.
Take for example that we should draw some object width of 10 mm and height 15 mm. Given that the case we run it we need to increase the paper when printing on A4 (210x297) and thereby use the component. Component of our standard and its useful area is the horizontal (width) 184 mm and vertically ("height") 285 mm (if you work hard component as the previous link above. (You must take into account if a Component has a table at the bottom of it and it included into useful space, ie. reject) what I in this example because I never had the need for the size of the drawing.
Draw 3D model in AutoCAD


Component in AutoCAD

First, we define a measure for the width (see formula for the SCALE, above). Useful space the width is 184 mm, and our drawing is in reality a wide 10 mm.
Then we define a measure for the "height". A useful space under the "height" is 285 mm, and our drawing is in reality a height of 15 mm.
So we got these two results (scale) that can be used. Of course we will take what scale that is smaller (to fit the width of the drawing). Here we should note that we take a scale that has a whole number and not decimal. So the next smaller scale of 18.4 => 10.

In this case our SCALE looks like 10:1, and when printed on paper drawing will be increased 10 times.

So the layout of the switch in MODELSPACE mode with pull-down menus to select the SCALE.
SCALE in AutoCAD 10-1
Scale Draw 4-1 in AutoCAD
Scale Draw 1-1 in AutoCAD
Scale Draw 1-10 in AutoCAD

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