Alternatively convert into a PDF, although that may add more to this document; refer to the section How to Modify the LibreCAD Users Manual. This manual is designed for the user to follow along as the user is using The lessons are in PDF format and because they are too big for the. LibreCAD_Users_Manual_pdf (file size: KB, MIME type: application/ pdf). LibreCAD Users Manual by Nigel Vincent.
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Warning: This is the initial release of the LibreCAD User Manual and may (will) .. Export the current drawing as a CAM, pdf or image file. This Quick Start Guide will help to introduce you with LibreCAD. If you have no Everything that you draw in LibreCAD will be exact and pre-. Finding good, free CAD software is not an easy task. There are plenty of great 2D CAD programs out there, like TurboCAD or AutoCAD, but.
We will use this in a later lesson - to get you familiar with using the command line. Sometimes LibreCAD waits for special input: Look in this area, most of the time LibreCAD writes down here what it wants.
We will use these in later lessons too! The last main area we want to look at now is the Drawing area or the Workbench as it is sometimes called. This is where you will do all of your drawing, dimensioning, etc. You can also change the settings of the program and drawings too. We will examine this next. First, click on Edit Options since 2. Then select Application Preferences. Notice the box that pops up and also notice that you can change quite a bit here under appearances.
At this stage we are going to use the 'defaults' the program has set up for us. Now click the tab Paths. Notice we can define folder destinations for things like fonts, hatches, part library items, templates etc. We want to create a folder for our Part Library and also our Templates. Next click on the 'default' tab, for now we will not change anything here, but notice that we can change the unit type — for instance we can choose Millimetres, Inch or Meter among others here!
Now click ok to close the box and we will look at Current drawing preferences. Everything you do here affects the drawing you are currently working on ONLY. So let's take a look. We have now covered settings changes and we also now have a blank drawing that we can save that will automatically load these settings when we want to do a drawing.
The red cross in the lower left drawing windows marks the origin of the coordinate system. Points and movements of the mouse are shown in Cartesian and polar coordinates in the lower left coordinate window. Additionally coordinates are given relative to a moving origin on the right to the absolute coordinates.
The coordinate window gives its absolute coordinates: There is one caveat: You define a new reference point by mouse click. It is the new relative center after mouse is moved after the click.
The drawing window looks like a fractal structure. It does not matter how much you zoom in or out, the lines keep their size. But there are other elements with possess absolute size: Text, arrows and hatching. You should have a close look to the numbers in the bottom right corner of the program window. The smaller number tells you the distance between grid dots, the larger between grid lines. If we chose 1 mm as basic unit see dimensions below , then the basic grid has 10 mm distance, the lines 10 cm.
Two lines cover an A4 page. Now we are going to begin drawing in LibreCAD. We will start with lines. Lines can be anything from lines to circles, rectangles, Arcs, ellipses, splines, polylines, and even text. We can even change the color, thickness and properties of the lines. You will learn how to do that in this lesson. Above you see an example of a simple part drawing that a tradesman might get from an engineer to make.
It contains all the information needed to make this part. So now let's look at drawing lines. Now, we are gonna do a little teaser using the modify option. We will work with modify at a later time but I wanted to tease you a little.
But now it is time to save your work once again so do it now. So far we have used the menu on top to draw with. Some people prefer to use the Icons to draw. If you look on the left side you see 2 columns of Icons. When you click the Icons a new menu with different Icons appears.
Let's see how that works. Move your cursor over to the left and place it over the slanted line Icon. You immediately see a different group of Icons appear. These Icons have to do with drawing lines. Remember when we drew a line using 2 points earlier? Also, you can see an Icon that has a rectangle and 2 green points and this will allow you to draw a rectangle like you did before.
Try it now and see for yourself. You now have a choice…you can draw with the menu across the top or use the Icons. Different people have different preferences. Our workbench is pretty cluttered now so let's delete some lines.
It is very easy to do this. Let's see how that is done by dragging:. As you can see, it is very easy to do.
This also works with circles, ellipses, and all lines. The one thing you have to remember though is if you want to move a rectangle or square you need to select each side first. If you select only one side then only one side will be moved. Ok, we have drawn our drawing and now we need to change some of the line properties. We can do this through the modify menu. We can change line colors, line thickness, type of line, and even change length and location through this menu.
Let's take a look at the line box. Look at the choices on the left color, width, and line type. For color, you can change the line color of the selected line by clicking the color menu and selecting he color you want. Go ahead now and select the color green and then click ok.
Notice the line on the workbench is now green. You can change the line color as many times as you wish using this method. Let's look at line type now. Put the white crosshairs over the line again and click. Our line box pops into view again and this time we want to click the line type and a pull down menu will appear. Notice you have many different line types to choose from. We will select dash from the pull down menu and then click ok.
Notice the line on the workbench is now a dash line. In a drawing, a dash line usually denotes a hidden feature. If you remember the L-Block drawing earlier you see a dash line on the front view because base surface is hidden from view in the front view. Line width is changed in the same way. You have choices on how thick the line should be and the selection works the same way as the other two.
Try drawing some circles and rectangles too and see how line modification works for them as well. When you are finished, go ahead and put away your line drawing by saving it and then click close. We have drawn our work and now we need to add dimensions and text. First of all, let's look at dimensioning a drawing. It would also at this point select edit then current drawing preferences and then dimension and make sure the text height is 2. Let's look at the menu a moment.
Notice several options are available to us. The first 4 are for dimensioning lines, the next 2 allow us to dimension a circle by defining either the radial radius or diametric diameter of a circle.
The next one, angular, will give us the angle in degrees of an object. The last one is leader which is used with text in a drawing and we will use that later in drawing.
So now let's continue:. Now let's draw a circle.
Put the circle in any available open space. Again, if you have problems, refer back to drawing a circle we covered earlier. This is good practice for you too. As we go further into the manual, you will become more familiar with drawing that it will become like second nature to you.
Dimensioning the diameter of the circle is done the same way as the radius. I want you to do that now by yourselves. Again, this is good practice and kind of a self-test to check how you are doing. You can use the dimensioning a circle as kind of a guide if you get stuck just remember that when it says radius, to substitute the word diameter.
Go ahead and try it now. One other point I want to make here on dimensions. You can change the color of your dimension if needed. You do this by clicking modify on the on the menu bar on top and then clicking properties.
Put the crosshairs over the dimension and click. A box will pop up and it has a pull down menu under color that will do that for you. Just click on a color and then ok and you will see the new color on your dimension. To change a dimension height, then click on edit on the menu bar and choose drawing preferences. Click the dimension tab and change the height area by typing in a new value. Then you click ok and the dimension size will change.
Notice that I said draw. This is not on the drawing menu itself, but is found on the dimension menu. A leader is usually used together text as part of dimensioning a drawing.
It is adding a note to the drawing. Note the example below. This is a way of adding a note to a drawing as a way of communicating information about the particular entity. A tradesman would look at this note and know that there are 4 holes and they are all 10 mm. Since we are using dimensioning and text this time it will provide a good lead in to our discussion of text in this chapter.
Now we will add text to the drawing. This adds notes and other important information to our drawing. Notice on the left Icon Menu there is a large A Icon. This is the text Icon.
Click on this Icon now and a text box will open like the one below. Notice there are many options you have. Starting on the top left you can choose the Font. Click the arrow and you can see on the pull down menu you have several fonts. We will play with these options a little later but for now, choose the standard font. The next option is text height which is how big the text will be. So go ahead and do that. Move over to the right side now and click inside the text box.
You are going to type 4 places and then click ok on the bottom. The box will close and you notice you have the yellow reference lines and the words 4 Places by the crosshairs. Use your mouse to move the text up by the right end of the leader and left click 1 time and right click 1 time to set the text. You can move the text by clicking the text to select it at this point you might want to turn off grid snap by clicking the snap on grid Icon on the lower top Icon menu.
You will notice when you clicked on the text, it turned red to show it is selected and there is a blue point by the text. Put your cursor on this blue point and hold down the left mouse button and move the text where you want it and click the left button 1 time and right click 1 time. Your text is now where you want it. Look at the font area and click font and look at the choices.
Usually for drawings you will use either the standard font or the iso font but there are many more choices. Notice below that the height option also.
Within the height box you can type in any size you want. The lower the number the smaller the text and the larger the number the larger the text. I am going to leave it to you now to type a word or two into the text box, select a font, type in a height click ok and insert the text into the drawing where ever you have some space.
Try it several times with different fonts and sizes for practice. Get a good feel for this so you will become very familiar with it.
When you are done, save your file and close it to put it away. Now we are going to touch on Layers. These are especially important in certain drawings. I want to point out one example now and I am going to get kind of technical here so please bear with me.
Engineers will understand what I am saying but this may be more challenging to understand for others so I am going to try to make it as simple as I can.
Layers are especially important in Assembly drawings. An Assembly drawing is a drawing showing 2 or more parts as an assembly on a drawing. Each part is drawn on its own layer. When all the layers are shown on the drawing, you have the complete assembly in view. In the Automotive industry, an Assembly drawing may show a complete car with 50 or more layers each layer showing a different part. Not only do they show the parts, but also how they fit together in an assembly. By studying this you can find any mismatches that may occur in assembling the vehicle.
By seeing these mistakes before the car goes into production, it can be corrected quickly. If not found before production, then this causes car recalls that you see now and then or halts and delays in production of the car. So now we are going to work with Layers. But before we do so, let's take a look at the Layer box area.
This is located on the right side of the work bench. The Illustration below shows the Layer box. Looking at the Layer box we note some Icons. The plus sign when we click it will produce a new Layer and we will look at that in a minute.
The minus sign will delete a layer and here you must be careful because it is very possible to accidentally delete the wrong layer so be careful. The last Icon on the right is the modify Icon and allows us to modify the attributes of the Layer or rename it. Below the Icons we have the Layer list. Here all the Layers in the drawing will be shown and if they are visible or invisible and if they will print. First of all, click file and then open and bring your blankdrawing.
Notice a Layer settings box pops up like the one above. Click in the layer name box and delete noname and type reference. Next check the box construction layer. In the default pen area, click color and then choose red. What this does is make the default drawing color red so that all lines and text drawn on this layer will be red.
Leave the rest as is and click ok. Notice on your layer list you have a reference Layer now. Go ahead and save the drawing by clicking file and then save. What we have done is saved this layer as part of our blankdrawing.
Now we are going to add some reference text to this layer. We are now going to use the leader drawing command to draw a couple of arrows. This will further help us to define direction.
We want everything to look as in the picture below. This reference layer will especially help us when we use the command line to draw lines. It will also remind us of the X and Y axis and which is which. There is another way of drawing in LibreCAD. By using the command line we can place entities specifically and accurately in a location in a drawing.
We can draw lines, rectangles, circles and more. The command line appears on the bottom of your screen in LibreCAD:. Notice there is a box next to the word command. This is where we will type our information. The word Command turns into blue to show it's activated and awaiting your command. Before we use this box however we need to do 2 things. First, check whether we are in the right layer. If not, choose right layer on layer window and activate it for drawing.
Also make sure your layer is not a construction layer. Otherwise all the lines you draw will be infinite, which is a special property of construction layers.
You can right click on a layer and then toggle this state.
There is also an icon next to the layer's name. The second thing we should do is click file and then save as from the pull down menu. We will save this drawing as L-Block. Click save and we will be good to go with our first drawing. We are going to draw the L-Block using the command line. The L-Block is an actual Automotive fixture part used in the fixtures that surround a car as it is being built.
It is used as a stop block in the fixture to hold a part in correct position for welding. To use the command line we need to know some things first. You notice in the drawing there is an X axis which is horizontal direction and a Y axis which is vertical direction. When you use the command line you are entering points on the drawing. The grid is a guide for you and the red crosshairs represent 0 on the drawing…. You will understand this better when we actually run through the exercise.
So now let's give it a try: The coordinates refer to the absolute origin. In case you prefer relative coordinates put the character in front of the coordinate, e. As you can see, we can be very accurate drawing this way. If you wanted to draw a circle you simply would type circle and follow the command prompts.
You can do the same with rectangle. Go ahead and experiment with those now. You might try drawing a 5. That is an 11mm hole which would be hard to draw any other way. Take the opportunity now to save your drawing using file, save or clicking the save Icon. Follow the link for A short manual for use from the command line.
Pan and zoom are very useful tools in LibreCAD. The zoom tool is invaluable when you need to move up close to an entity to work on it. This is especially true when the area is very small, or several lines drawn close together. As you will see in a moment, there are several ways to use zoom. Pan allows you to move the drawing up, down, right, or left. This is especially useful if your drawing is large. Pan and zoom are accomplished using the Icons below.
Starting from the left, is the zoom in icon. Click on this and you gradually zoom in on the drawing. The next Icon is the zoom out icon. Click on this and you gradually out on the drawing. The next Icon is autozoom which zooms you in faster. The next Icon is the previous view Icon which when clicked returns you to the last view. The next Icon is window zoom which allows you to put a window around a certain area and zooms you right into the area.
It is the fastest way to zoom in. I particularly love using this because I can get close up in a small area very fast, do my work, and click the previous view icon to bring me back out of zoom quickly.
The last Icon on the right is Pan. Click this icon and place your cursor in the work area and hold down the left mouse button.
You can move the drawing all over the work area and view the drawing area outside the work area also. You should still have your L-Block drawing out on your work bench so take some time now and experiment with Pan and Zoom. To use the zoom window:. Zooming and panning can be achieved by mouse wheel scrolling. Zooming around the current cursor position is also triggered from keyboard by: Holding down the Ctrl key allows, the view can be grabbed and dragged by mouse.
There is also a "Draft" icon in the View toolbar. When pressing this icon, all your hatches become invisible, and all images and text only have their bounding boxes shown. You can use this, when you have a lot of hatches in your drawing and want prevent LibreCAD to slow down when rendering your drawing.
On the Icon menu on the left you will find the Info Icon green horizontal ruler icon. With this icon you can actually measure an entity without having to dimension it.
User Manual for LibreCad 2.0
It is useful for checking your work as you draw or for a general check of information of an entity. When you click this Icon you will get the following Icon menu:. The top icon on the left allows you to measure point to point. The top right icon let's you measure point to a line. The middle left icon let's you measure an angle.
The middle right icon let's you measure total length of entities. These icons are simple to use as you just click one point or entity and then click the other point or entity and the results will be displayed on the bottom in the command information box. Since you have the L-Block drawing on your workbench, go ahead and take a few measurements now. We use Isometrics when we want to show something in 3D.
LibreCAD has an Isometric grid setting to enable us to do this. I know from experience that Automotive parts drawings usually contain a front view, side view, and top view in 2D and a small 3D isometric view of the part to assist in making the part. The craftsman making the part then has a good visual idea of what the complete part looks like. An Isometric view of a part might look like the diagram on the right.
This is a simple L-Bracket. Looking at this Isometric view you get a very good idea of how the part should look. What you see in this drawing is a metal L-Bracket with a 1 mm thickness. In a 3D CAD program you would also be able to shade the surfaces to make them solid surfaces and you would have 3D rotation to look at all angles at the part. Since this is a simple part, an Isometric view will suffice nicely for us.
How do we make an Isometric view? We will look at this in steps as we draw our first Isometric view. In this drawing we will also learn some new drawing tools like drawing parallels, trim and extend, creating a radius on a part and even tools we already have learned like Pan and Zoom, Dimensioning, Changing line types and Basic drawing tools we have learned before. Take a look at this illustration: Up until now we have been drawing in the orthogonal grid which is the 2D grid.
In the illustration above, the left side shows the X and Y coordinates, which show length and height. In the Isometric grid, we still have the X and Y coordinate, but now we have a Z coordinate which shows us depth or width now as well.
Using LibreCAD When we launched the software for the first time, it asked us to choose our preferred language and unit for measuring drawings.
The default unit is millimeter. LibreCAD's user interface displays some layer tools and the working area.
We found it relatively easy to use the program, as the menu bar gave us access to most of the categories we wanted, including Draw, Layer, Dimension and Block.
In addition, we could customize the interface by dragging its elements over the working area and positioning them where we wanted. Although we could use the mouse to locate the position of a point, we could get more precise results by using the built-in command line. LibreCAD gave us different drawing tools and items, including lines, ellipses, circles, arcs and splines, which we could access in multiple iterations. For instance, we could define circle parameters in five different modes.
We combined different shapes to create the model we wanted. Grids make it easy to draw proportional objects even without using any measurement.Adding Text to a Drawing Now we will add text to the drawing. We have to tell it what we are drawing so type line and press the enter key on the keypad.
Holding down the Ctrl key allows, the view can be grabbed and dragged by mouse. It does not matter how much you zoom in or out, the lines keep their size. However, the donation was voluntary.
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