This section describes how to perform some tasks in addition to User Manual and User Guides. The content is the following:
Quite often we need to copy some part of a drawing A and paste it in a drawing B. It is not difficult provided the user knows that both drawings must be opened in the same LibreCAD session.
In the example below, each layer has a specified color in order to better visualize what happens. In drawing A, there are 3 layers (layer1, layer2, layer3) showing rectangles and in drawing B there are also 3 layers (layer1, layer2, layer4) showing circles. Each layer has its own color for the sake of clarity. Let us say that we want to copy the green and red rectangles from drawing A to drawing B. The steps are :
Note that LibreCAD moved the green rectangles of layer 2 in drawing A to the same layer2 in drawing B : so the green rectangles and circles now have the same layer.
When drafting, one often needs to re-use /several times the same part/: it can be a door for architectural design or a bolt for mechanical design. Even though one can copy and paste the part, it is not efficient. A more efficient way is to use a library of blocks which is at hand when you draft in LibreCAD.
You can refer to the bloc section in the user manual for supplementary information.
Now, we can insert this block as many times as we want in the current drawing at different locations with different orientations and scales.
If we want to use this block in another drawing, there are 2 options:
Just after creating the block in the current drawing, we need to make this block available for other drawings. The example below in based on a Linux system but the process is the same for MS-Windows system except for the path name usually in the form of c:\users\fabrice\bureau\.
Note that other folders are also visible: these are coming by standard with the installation of LibreCAD. Your library will be added to the standard library. This way, your library is not deleted when uninstalling LibreCAD from your system.
The lines and circle will be perfectly tangent, for instance the “trim” will work on both lines.
Let's assume General Scale is set to 1. This is for an intended print scale of 1:1.
Then to scale from mm to inches:
To adapt the Drawing Preferences to inches:
There isn't a circular dimension tool for annotating arcs, but we can use one of the existing dimension tools, and then manually edit the label.
This really only works convincingly on segments of circles, although the approach could be applied to a continuous string of line entities, at a push, maybe with the
Dimension: Aligned tool.
Circle: Centre, Point tool
Line: 2 Points tool
Modify: Divide tool
Dimension: Angular tool
Modify: Properties tool
Hint: in addition to
Snap: Centre, you can find the centre of an arc with the
Dimension: Radial tool; you can then use two radial dimensions as temporary construction lines from which to create the angular dimension.