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Part 2 : We begin to draw (Lesson:8 Units of Autocad)
Units of Autocad.
Resume ‘line’ command and with “ortho” mode activated, decide the first point of the line on the screen, then move the mouse on the right to create an horizontal line.
Now instead of clicking the second point of the line, dial a number with the keyboard, such as 100 and then press Enter or Right click twice to confirm and exit the command.
As you understand you have just made a long line “100”, but what is this value…?
For Autocad are 100 units, but you decide how to draw where they could be 100 millimeters, centimeters or meters.
It also depends on what you’re drawing so there may be 100 mm of a metal object to draw on a locksmith, for example, was 100 cm if the side of a wooden table, or 100 meters of land for the fence.
Generally I’m happy with the cms, but it is good to learn how to handle various situations.
The thing to keep in mind however is that in Autocad we must generally think to draw in full scale 1:1 !
I mean if I have a room of 4×4 meters and i draw considerations in cm, draw the long walls of the 400 units, which will consider just “cm”, or 4000 units, which will consider “mm”.
In general, you must draw by entering the actual measurements of what you represent, except in the case of magnified details you’ll have to do on the same table.
It will be at the time of print design that will set a scale, (to the plot) as needed, and here things will change in the units with which we have interpreted the drawing (cm or mm.).
Let’s say, for the print settings, it might be more correct to draw considering the “mm”, but we’ll talk about this in due course.
Setting units in the “Format” menu.
Let’s then see another important approach to manage units.
From the menu “format” , click on “Units ..”
In the window that appears, click on the popup menu items “length” and “angle”, respectively, sets “Decimal” and “Decimal Degrees” , as in the picture.
As you’ll notice AutoCAD can be set for different types of units, such as “inch”, which correspond to the “Architectural”.
In our case the decimal units should be used for both the lengths to which the corners.
Attention: the unit settings menu does not apply in a general format for the program, but in this case affect one individual “files” that we’ll made.
Click “OK” to confirm and close the window.
We will back on this when we print our design .