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Latest revision as of 11:31, 23 December 2024
Draft Modification Tools-English
| Time | Narration |
| 0:00 | Welcome to the tutorial on Draft Modification Tools. |
| 0:07 | In this tutorial, |
| 0:09 | We will perform the following object operations |
| 0:12 | Mirror, Offset |
| 0:15 | Delete |
| 0:17 | Trim, Extend |
| 0:19 | Downgrade, Upgrade |
| 0:22 | Rotate and Line segmentation |
| 0:26 | To record this tutorial, I am using |
| 0:29 | Windows 11 OS |
| 0:32 | and FreeCAD 0.21.1 |
| 0:37 | To follow this tutorial, |
| 0:39 | Learners must be familiar with the FreeCAD interface. |
| 0:44 | For pre-requisite tutorials, please visit this site. |
| 0:49 | The files used in this tutorial are provided in the code files link. |
| 0:54 | Please download and extract the files |
| 0:58 | Make a copy and use them while practising. |
| 01:02 | I have opened FreeCAD and opened the file provided with this tutorial. |
| 01:09 | First let’s mirror the polygon using Draft Modification Tools. |
| 01:15 | Select the pentagon and click on the Mirror tool as seen. |
| 01:20 | Move the cursor to the canvas to draw the mirror angle and direction. |
| 01:26 | Left click to set the first point and move the cursor to see the mirror line. |
| 01:34 | In 2 dimensions this will be a line. |
| 01:38 | I will draw a vertical line on the canvas to set the mirror line. |
| 01:43 | When a tool is chosen, report view will prompt the user for the next action. |
| 01:50 | Select the second point and left click again. |
| 01:55 | Notice the pentagon is mirrored. |
| 01:57 | The mirrored object and the parent are equidistant from the mirror. |
| 02:04 | Pause the video and draw a mirror through the object. |
| 02:08 | Notice the parent and child overlap |
| 02:13 | Since they are symmetrically placed. |
| 02:16 | Let’s delete the mirrored objects. |
| 02:20 | To choose more than one object, hold down the control key while
selecting. |
| 02:27 | Choose a mirrored object in the combo view and press the Delete key. |
| 02:33 | The Downgrade tool converts complex objects into multiple simpler objects. |
| 02:40 | Select the polygon. |
| 02:42 | The object is shaded now. |
| 02:45 | Click once on the Downgrade tool. |
| 02:49 | Notice the object is converted to wire and not shaded. |
| 02:55 | Click again on the Downgrade tool. |
| 02:59 | Now the object is converted to multiple individual edge objects. |
| 03:05 | Now the individuals can be edited separately. |
| 03:10 | This is a very useful feature while drawing. |
| 03:13 | I will press control Z to undo the property changes of the edited object. |
| 03:20 | Next, let’s learn about the upgrade tool. |
| 03:24 | Press the control and A keys together to select all the edges. |
| 03:29 | You may also select them individually if needed. |
| 03:33 | Click on the upgrade tool once. |
| 03:36 | The objects are now grouped together as a single wire object. |
| 03:41 | Click on the upgrade tool again. |
| 03:45 | Now the wire is converted to a face object. |
| 03:49 | Pause this video and downgrade the face object again to single edges. |
| 03:56 | Now select only 4 of the edges and upgrade them to a wire. |
| 04:02 | Move the wire object slightly away. |
| 04:07 | Then, upgrade the wire object to a face. |
| 04:12 | Notice the completed pentagonal face and also the edge that was not upgraded. |
| 04:19 | Let’s learn about the Trimex tool by downgrading the object back to 5 edges. |
| 04:27 | Click on one of the edges to select it as seen. |
| 04:32 | For clarity in the video, I will increase the line width to 5. |
| 04:38 | Adjust the zoom as desired. |
| 04:41 | Now, click on the Trimex tool. |
| 04:45 | We will learn to extend and trim the line now. |
| 04:49 | Move the cursor away from the end of the selected line. |
| 04:55 | To extend the line click on the desired spot on the canvas. |
| 05:01 | I will undo this operation and demonstrate trim. |
| 05:05 | Again select the line and choose the Trimex tool. |
| 05:09 | Trim is dependent on the position and length of the trim. |
| 05:15 | Now we move the cursor a little to trim the line as seen here. |
| 05:21 | The region to be trimmed does not have the black overlay. |
| 05:25 | Notice part of the line has a black overlay on the green selection. |
| 05:33 | Left click once and notice the trimmed region. |
| 05:37 | I will undo the trim by pressing control and Z keys together. |
| 05:43 | Let’s repeat the process. |
| 05:46 | Select the line, choose trimex and trim. |
| 05:50 | Now carefully go past the half length of the line. |
| 05:56 | You will notice the black overlay region inverts after you pass the half mark. |
| 06:02 | Click on the canvas. |
| 06:05 | This time the shorter segment is deleted and not the starting segment. |
| 06:12 | I will select all objects by pressing control and A keys together. |
| 06:18 | I will delete them and redraw a pentagon to learn the offset tool. |
| 06:24 | Use Wireframe style for clarity. |
| 06:28 | Select the pentagon and then the offset tool. |
| 06:32 | Notice a concentric object as the cursor is moved on the canvas. |
| 06:39 | The concentric object can have a larger size or smaller size. |
| 06:45 | The distance from the parent is seen in the task tab. |
| 06:50 | Without moving the cursor, type 5 and press the Enter key. |
| 06:56 | The object is now enlarged. |
| 07:00 | Pause the video, select the object and select the offset tool again. |
| 07:06 | Now, check the Copy box in the task tab. |
| 07:10 | Again repeat the offset to create a smaller or larger dimension. |
| 07:17 | Left click on the canvas and notice that two objects are present now. |
| 07:23 | Repeat this procedure with checking the box for OCC-style object. |
| 07:32 | Notice the extra edge around the vertices that is added now. |
| 07:37 | Next, let’s rotate the object using the rotate tool. |
| 07:44 | Select the polygon and then click on the rotate tool. |
| 07:49 | To rotate in a 2D plane, we have to set two parameters. |
| 07:55 | They are the axis of rotation and the angle of rotation. |
| 08:00 | First, let’s pick the pivot point for rotation. |
| 08:05 | Move the cursor in the canvas and notice only Δx and Δy changes. |
| 08:13 | Left click at the desired position in the canvas. |
| 08:17 | Now the user is prompted to enter the base angle. |
| 08:23 | I will move the cursor and left click once again. |
| 08:27 | User can also type in the exact desired base angle without moving the cursor. |
| 08:34 | Now the axis of rotation is set. |
| 08:39 | User is now prompted to enter the rotation angle. |
| 08:44 | I will enter 90 without moving the cursor and press the Enter key. |
| 08:50 | Notice the rotated object. |
| 08:54 | Users can practice the various options. |
| 08:57 | As needed save your work and exit FreeCAD. |
| 09:01 | Now let's summarize. |
| 09:04 | In this tutorial, we learned about various Draft modification tools. |
| 09:10 | They are: |
| 09:11 | Mirror, Upgrade and downgrade |
| 09:14 | Rotate |
| 09:16 | Trimex and |
| 09:18 | Offset |
| 09:19 | For assignment activity, please do the following. |
| 09:23 | Draw a line |
| 09:24 | Scroll down to subdivisions in the value tab in combo view |
| 09:30 | Change it to 5 and press Enter |
| 09:34 | Move the cursor over the line |
| 09:37 | Notice the 6 equal segments |
| 09:41 | Practice the modification tools learned in this tutorial. |
| 09:46 | Rotate, offset, downgrade, upgrade and mirror tools. |
| 09:51 | This video summarizes the Spoken Tutorial Project. |
| 09:56 | Please download and watch it. |
| 09:58 | The Spoken Tutorial Project team, |
| 10:01 | conduct workshops and |
| 10:03 | gives certificates. |
| 10:06 | Please write to us. |
| 10:08 | Please post your timed queries in this forum. |
| 10:12 | Spoken Tutorial Project was established by Ministry of Education, Government of India. |
| 10:19 | Thank you for joining. |
