<b>Narration</b>

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Welcome to the tutorial on <b>Hatch and Array. </b>

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In this tutorial, we will learn to,

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<b>Clone </b>an object

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About <b>Hatching </b>

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Download <b>hatches</b> from <b>cadhatch.com</b>

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About <b>hatch lines </b>

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About <b>arrays</b> and

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Add various types of <b>arrays</b>

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To record this tutorial, I am using <b>Windows 11 </b>OS and <b>FreeCAD</b> 0.21.1

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To follow this tutorial,

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Learners must be familiar with the <b>FreeCAD</b> interface.

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For pre-requisite tutorials, please visit this site.

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Open<b> FreeCAD. </b>

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Click on <b>Create</b> <b>new</b> to start a new drawing.

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Go to <b>Draft</b> <b>workbench</b>.

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Make sure the <b>orthographic</b> and top view are selected.

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Select the R<b>ectangle</b> tool and draw a rectangle on the canvas.

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Select the rectangle and click on the <b>clone</b> <b>tool.</b>

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A clone will get created which is not separately visible.

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However we can notice a new object on the object list.

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Select this new object and move it as desired.

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This is another way to copy and move an object.

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Next, let’s add hatches on this rectangle.

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Cross sections of a drawing are filled with thin parallel equally spaced lines.

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Thus user can differentiate between various areas with ease in a drawing

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Open a web browser and go to <b>cadhatch</b>.<b>com</b> website.

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Notice several patterns that we can download freely.

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Scroll down and notice the parallel hatch pattern.

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Click on it and a new page loads with several parallel styles.

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I will click on the very first one to download it.

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For some of you the <b>Download</b> may start automatically.

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If a prompt appears, save the <b>hatch</b> <b>zip</b> <b>file</b> to your computer.

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Next we have to extract the files from the zip archive.

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Open the file manager and select the downloaded <b>zip</b> file.

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Right click to open the menu and select extract all.

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Click on <b>extract</b>.

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Now open the <b>extracted</b> file folder.

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Notice 2 files in it.

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One has a .<b>pat</b> extension and the other is a text file with details about the <b>hatch</b>.

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Let’s open the text file,

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Notice a 45 degree angle.

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Let’s close the text file.

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Go back to <b>Freecad</b>.

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Select the rectangle.

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Click on <b>downgrade</b> once to convert to edges.

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Select all the edges.

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Click on the <b>upgrade</b> tool to change to <b>wireframe</b>

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Click again on <b>upgrade</b> to change to <b>face</b> <b>mode</b>.

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Select the face and change the style to wireframe.

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Select the face and click on the <b>hatch</b> <b>tool</b>.

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The left panel mode changes.

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In the hatch option, click on the <b>ellipsis</b> as seen.

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Navigate through the dialog box and select the extracted .<b>pat</b> file as seen.

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We don’t notice many hatch lines in the rectangle now.

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For some of you the scale may be already at 1.

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We can change the scale and rotation angle of the hatch as desired.

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Notice that more hatch lines appear in the rectangle now.

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Pause the video and change the spacing, line style and angle.

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Practice to create various hatching styles.

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Next, let’s learn about arrays.

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<b>Array</b> is specified number copies of an object placed in a pre-defined order.

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They can be placed along a line, row-wise, column wise, circular and so on.

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I have deleted all the objects on the canvas.

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Let's draw a rectangle to demonstrate arrays.

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I will select the non-hatched rectangle.

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Then click on the array tool in the modification panel.

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Notice several types and I will choose the first option called <b>array</b>.

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The left panel properties change and it is for a <b>rectangular</b> <b>array</b>.

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For the number of elements in x, y and z, I will enter 5 in each as seen.

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For the <b>X</b> <b>interval</b>, I will type 10 and press the <b>Enter</b> key.

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Repeat this for y and z interval values as well.

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Scroll to the top of the left panel and click on <b>Ok</b> to see the created <b>array</b>.

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Zoom out as needed to on the canvas.

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Learners can pause the video.

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Change the values in the number of elements and intervals.

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Familiarize with the various patterns that you can obtain through the arrays.

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Next let’s learn about <b>polar</b> <b>array</b>.

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First create a circle on the canvas with 25 mm radius as seen.

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Then, draw a line to represent the radius.

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It is from the center to the circumference which is called endpoint.

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Select this line and go to the array tool.

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This time choose the Polar array option.

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Again, the options in the left panel changes.

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Type 12 for <b>Number</b> <b>of</b> <b>elements</b>.

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Do not press the <b>Enter</b> key.

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Move the cursor to the circumference of the circle to locate the center of the circle.

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We can see a white dot at the center as seen.

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Click on it and notice that the circle is equally divided into 12 sections.

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Next select the circle and the <b>circular</b> <b>array</b> on the canvas.

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Click on the <b>array</b> <b>tool</b> and select the <b>circular</b> <b>array</b> option.

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On the left panel several properties are seen for this array.

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Radial distance, tangential distance, Number of circular layers and symmetry can be changed.

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I will change it to 100, 50 and to 3 layers.

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I will keep symmetry to 1.

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Click on <b>OK</b>.

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To notice the new pattern, you may need to zoom out on the screen,

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Learners can pause the video.

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Change these values and familiarize yourself with the various patterns you can create.

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Next we will create a <b>path</b> <b>array</b>.

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I will select 2 objects from the canvas.

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Let's draw a rectangle.

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Hold down the <b>control</b> <b>key</b> when selecting more than one object.

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First I will select the circle and then the non-hatched rectangle.

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Then, go to the <b>array</b> <b>tool</b> and choose the <b>path</b> <b>array</b>.

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I will leave the default options as is.

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Notice that the circle which was selected first moved towards the rectangle.

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Scroll down the <b>property</b> <b>tab</b> in the left panel to <b>counts</b>.

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Change <b>counts</b> to 10.

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Notice the difference on the screen.

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If desired save your work and exit <b>FreeCAD</b>.

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Now let's summarize.

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In this tutorial, we learnt about

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Cloning an object

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Hatching

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Downloaded hatches from <b>cadhatch.com </b>

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About hatch lines

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About <b>arrays </b>

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Added various types of <b>arrays</b>

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For assignment activity, please do the following.

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Create hatches as seen here.

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Create an array as seen here.

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This video summarizes the <b>Spoken</b> <b>Tutorial</b> Project .

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Please download and watch it.

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The <b>Spoken</b> <b>Tutorial</b> <b>Project</b> team,

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conducts workshops

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And gives certificates.

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Please write to us.

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