FreeCAD/C3/Eye-end-part-of-Knuckle-Joint/English-timed
From Script | Spoken-Tutorial
Eye end part of Knuckle Joint-English
| Time | Narration |
| 0:01 | Welcome to this Spoken Tutorial on Eye end part of Knuckle Joint. |
| 0:17 | In this tutorial, we will learn to, |
| 0:10 | Draw an eye end part of the Knuckle joint using Sketcher tools. |
| 0:15 | To record this tutorial, I am using |
| 0:18 | Windows 11 OS and |
| 0:20 | FreeCADversion 0.21.2 |
| 0:25 | To follow this tutorial, |
| 0:27 | Learners must be familiar with the FreeCADinterface. |
| 0:30 | For the prerequisite tutorials, please visit this site |
| 0:35 | The Eye end'part of the knuckle joint'is used to join parts that need to pivot or rotate. |
| 0:41 | Let us open FreeCAD. |
| 0:44 | I will open a new file. |
| 0:47 | I have selected the PartDesign workbench. |
| 0:50 | Let us create a new Body. |
| 0:53 | Now select Create sketch to create a new Sketch. |
| 0:59 | Select the XY-plane and click on OK. |
| 01:03 | The workbench switches to Sketcher workbench. |
| 01:07 | Now I will select the Create circletool from the toolbar. |
| 01:11 | Place the cursor on the centre of the plane and draw two concentric circles. |
| 01:18 | Let us set the radius of the circles using the Constrain radiustool. |
| 01:24 | Let us change the radius of the larger circle to 25 mm. |
| 01:30 | Similarly change the radius of the smaller circle to 12.5 mm. |
| 01:36 | Let’s select the Create polylinetool. |
| 01:40 | The Polyline tool allows you to draw lines continuously. |
| 01:44 | Place the cursor on the left side of the outer circle. |
| 01:49 | Drag the cursor to the left to draw a horizontal line. |
| 01:53 | Left click to complete the line. |
| 01:56 | Now to draw a vertical line, drag the cursor vertically downwards. |
| 02:01 | Left click to complete it. |
| 02:04 | Now draw a horizontal line to the right to connect it to the circle. |
| 02:09 | Let us set the length of the top horizontal line to 80 mm. |
| 02:14 | Click on the line, and click the Constrain horizontal distancetool. |
| 02:19 | Change the length to 80 mm. |
| 02:23 | Now select both the horizontal lines and select the Constrain equaltool. |
| 02:29 | Constrain equaltool is used to make two or more drawings of equal size. |
| 02:36 | Now select the vertical line. |
| 02:38 | Set its length to 30 mmusing the Constrain vertical distancetool. |
| 02:44 | Now select the Trim edge tool. |
| 02:49 | Trim edge tool is used to delete a line or curve between two intersection points. |
| 02:54 | Select the arc of the outer circle that is between the horizontal lines to trim it. |
| 03:01 | Now click Close in the Combo view. |
| 03:04 | Select the top view using the Gizmo. |
| 03:09 | Go to the Modeltab and select the sketch if not already selected. |
| 03:13 | Now select the Padtool from the tool bar. |
| 03:17 | In the Combo View, under Pad Parameters change the length to 30 mm. |
| 03:24 | Also tick the Symmetric to plane check box. |
| 03:27 | Now click the OKbutton. |
| 03:31 | Now let us rotate the drawing. |
| 03:34 | Place the cursor on the centre of the component. |
| 03:37 | Press and hold the middle mouse button. |
| 03:40 | Right click and drag the cursor to the right |
| 03:44 | Now select the Create a datum planetool from the toolbar. |
| 03:48 | It is used to create a new plane to draw the components. |
| 03:53 | Now select the back face of the square, to set it as a reference. |
| 03:58 | Then click OKin the Combo view. |
| 04:02 | You can see that a plane appears at the bottom of the component. |
| 04:06 | Select the datum planefrom the Model tab if not selected. |
| 04:10 | Now select Create sketch. |
| 04:13 | Now select the arrow near the Create regular polygon tool. |
| 04:18 | It is used to draw different polygons. |
| 04:21 | In the drop down, select Octagon. |
| 04:24 | Now place the cursor in the middle of the plane. |
| 04:28 | Left click and drag to see a model drawing. |
| 04:33 | Adjust the octagon to make its sides parallel to the background square. |
| 04:37 | Now left click again to complete the octagon. |
| 04:41 | Select the left side line of the octagon. |
| 04:44 | And select the Constrain verticallytool from the toolbar. |
| 04:48 | This makes the side vertical. |
| 04:51 | Select the left side line of the octagon and the midpoint of the plane. |
| 04:57 | Select the Constrain distancetool from the toolbar. |
| 05:01 | In the Insert length dialog box, set the length as 15 mmand click OK. |
| 05:07 | Observe that the octagon is perfectly placed. |
| 05:11 | Click Close in the Combo view. |
| 05:14 | Now select the sketch if not selected. |
| 05:18 | Select the Pad tool from the tool bar. |
| 05:22 | Change the length to 40 mmand click OK. |
| 05:27 | Select the datum planein the Combo Viewand press Space bar. |
| 05:32 | This hides the plane. |
| 05:34 | Now select the component. |
| 05:37 | In the Propertytab, go to Data. |
| 05:41 | Under Part Designchange the Refinevalue to True. |
| 05:46 | Now click anywhere in the blank space to deselect the component. |
| 05:51 | Now select Create a datum plane tool from the tool bar. |
| 05:56 | Select the bottom face of the octagon and click OK. |
| 06:01 | Now select the datum planefrom the Modeltab if not selected. |
| 06:06 | Now select Create sketch. |
| 06:10 | Select the Create circletool from the tool bar. |
| 06:14 | Draw a circle from the middle of the plane. |
| 06:18 | Using the Constrain radiustool, let us set the radius as 12.5 mm. |
| 06:25 | Then click Close in the Combo view. |
| 06:30 | Now select the sketch if not selected. |
| 06:33 | Select the Pad tool from the tool bar. |
| 06:37 | In the Combo viewchange the length to 25 mmand click OK. |
| 06:43 | Now select the datum planein the Combo viewand press Space bar to hide it. |
| 06:47 | Now click anywhere in the blank space to deselect the component. |
| 06:55 | Now select the Create fillettool from the toolbar. |
| 07:00 | Select the intersection line between the ring and the rectangle. |
| 07:04 | Repeat it for the other side also. |
| 07:06 | In the Combo viewunder Fillet parameters, two edges are shown. |
| 07:12 | In the Radius field change the radius to 24 mm. |
| 07:17 | Then click OK. |
| 07:19 | Again select the Create fillettool from the toolbar. |
| 07:23 | When an octagon is drawn inside a square, four triangular edges are formed. |
| 07:29 | We have to smoothen these triangular edges. |
| 07:31 | Let’s rotate the drawing and select all the triangular edges as shown. |
| 07:38 | In the Combo View,Fillet Parameters window opens. |
| 07:42 | In the Preview,all the four selected edges are shown. |
| 07:46 | In the Radiusfield change the radius to 3 mmand click OK. |
| 07:53 | You can now see that the component is ready. |
| 07:56 | Now let us save the file with an appropriate name. |
| 08:03 | With this we come to the end of this tutorial. |
| 08:07 | Let us summarize. |
| 08:09 | In this tutorial, we have learnt to, |
| 08:12 | Draw an eye end partof the Knuckle jointusing Sketcher tools. |
| 08:17 | As an assignment, |
| 08:19 | Draw a joint pinas shown in the figure. |
| 08:23 | This video summarizes the spoken tutorial project. |
| 08:28 | Please download and watch it. |
| 08:30 | We conduct workshops using spoken tutorials and give certificates. |
| 08:35 | Please write to us. |
| 08:37 | Please post your timed queries in this forum. |
| 08:41 | Spoken tutorial project was established by the ministry of education government of India. |
| 08:47 | This tutorial is contributed by Dr. Sathiya Narayanan and K.Sakthivel. |
| 08:52 | Thank you for joining. |
