How to Create a Fountain Pen

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					How to Create a Fountain Pen

Lesson 4

How to Create a Fountain Pen

This lesson will guide you in building a fountain pen. You will use the following tools: • • • • • • • • • NURBS curves. Extrusion. Mirror. Trim. Blend Curves. Lathe. Edge Extract. Fill Path. Birail.

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Building the pen nib
1) If you are already working with solidThinking, choose the New command from the File main menu and save the scene you were working on. Otherwise, you must first run solidThinking. 2) Choose the default layout option from the Layouts panel (choose View4Layouts).

3) Open the Grid Setup panel by either selecting Edit4Grid Setup.

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4) Choose the Grid#1 tab and set X, Y, and Z to 0.1.

Let’s now begin by modeling the pen-nib. 5) Click the Ellipse: focuses, point. As focuses coordinates use points Focus1 = 0.6, 0, 0 and Focus2 = -0.6, 0, 0; as Point1 use coordinates 1.2, 0, 0.2.

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6) Select now the ellipse and insert Start angle = 10 and End angle = 170 in the Modeling Tool panel.

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7) Click the Extrude icon (with the Front view active) and extrude the ellipse with a value of –6.9. Your object should look like the one below.

Now you have to follow the red outline as in the next figure and draw a profile in the area which will then be tour Trim curve. 8) Click the Top View and click activate the NURBS curve icon to start inserting the points. The Local axes origin is always at the default value of 0,0,0. Insert the following points: #1(0, 0, 0), #2(1.2, -2.75, 0), #3(1.35, -2.85, 0), #4(1.2, -3, 0), #5(0.81, -6.9, 0).

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9) Click the Mirror icon, select the NURBS curve and press Spacebar to close the selection. Define now the X axis as your Reflection Axis.

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10) Click the Trim surface function and select the right curve followed by the extruded ellipse. You will so perform a trimming onto the surface. Repeat the procedure for the left curve.

This should be your resulting surface. To obtain the inner portion of the object and thus create your nib, switch on the Trim exterior radio button in the Loop exterior section of the Modeling Tool section.

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Here is your pen-nib. Let’s now move on to the body of the pen. 11) Open the Right View to full size (simply double-click the title bar) and draw the following curves using the NURBS curve tool.

Curve1: #1(0, -4.1, 1); #2(0, -4.1, 1.3); #3(0, -4.1, 1.4); #4(0, -4.2, 1.5); #5(0, -4.3, 1.4); #6(0, -4.5, 1.5); #7(0, -4.7, 1.5).

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How to Create a Fountain Pen

Curve 2: #1(0, -4.7, 1.5); #2(0, -8.2, 1.5).

Curve 3: #1(0, -8.2, 1.5); #2(0, -8.2, 1.6); #3(0, -8.3, 1.6); #4(0, -8.4, 1.7); #5(0, -8.7, 1.8); #6(0, -10, 1.8).

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Curve 4: #1(0, -10, 1.7); #2(0, -11.6, 2.3); #3(0, -14.6, 2.4); #4(0, -16.4, 2).

Curve 5: #1(0, -16.4, 2); #2(0, -16.4, 2.1); #3(0, -16.5, 2.1); #4(0, -19.1, 1.8); #5(0, -21.7, 1.8); #6(0, -35.2, 1.8).

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Creating the revolved surfaces and using Round
To obtain the body of the fountain pen you can use the Lathe modeling tool, which creates revolved surfaces by rotating around any user-defined axis. 1) Click the Lathe icon or choose the Tools4Surfaces4 Lathe command. 2) Click Curve 1 and press Enter to confirm the following values in the console: Rotation = 360; Revolution Axis = 0, 0, 0; Revolution axis direction = Y. Do the same with Curves 2 and 3.

3) Click Curve 4 and press Enter to confirm the following values in the console: Rotation = 360; Revolution Axis = 0, 0, 0; Revolution axis direction = Y. Do the same with the Curves 5.

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Now you need to seal the back portion of the pen.. 4) Click the Edge extract icon and click the hollow surface. The surface will turn green and you will have to select the edge to be extracted as you can see in the figure.

Click this edge

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5) Click now the Fill path icon and then click the curve you have just extracted. With this procedure, you will cover up the hole.

6) Click the Combine icon and click first the revolution surface (object A), then the filled hole (object B). Press Spacebar to end the command.
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A

B

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7) Click now the Round tool. Confirm Tolerance and sew tolerance value by pressing Enter . Pick the surface, then the edge and press Spacebar . 8) At the Radius prompt type 0.3.

Edge to pick

Rounded Edge

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9) Click the Edge extract icon and click the hollow surface in the front side of the pen.. Select the inner edge as shown in the figure.

10) Click the Fill path icon and then click the curve you have just extracted. You can select it also in the World browser. With this procedure, you will cover up the hole.

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This is what your pen should look like. At this point, only the clip present in the pen cap is missing. 11) Activate the Right View, click the NURBS curve icon and draw the following curves.

Curve Top: #1(0, -33.1, 2.6); #2(0, -28.1, 3.8); #3(0, -23.7, 2.9); #4(0, -22.7, 2.4); #5(0, -22.5, 2); #6(0, -22.5, 1.9).
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CurveBottom: #1(0, -33, 1.8); #2(0, -31.3, 2.6); #3(0, -27.8, 3.2); #4(0, -26, 3.1); #5(0, -24.6, 2.8); #6(0, -23.4, 2.6); #7(0, -23.1, 2.2); #8(0, -22.9, 1.9); #9(0, -22.5, 1.9). 12) Click now the Circle: center, radius icon and accept all the default values. 13) Click the Birail icon and select the Profile curve (Circle), Rail curve #1 (Curve Top) and Rail curve #2 (Curve Bottom). You will so obtain the pin.

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14) Click the Sphere icon and accept the default Local Axes Origin = 0, 0, 0 and Radius = 1. 15) Use the Translate command to position the Sphere as in the figure below.

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How to Create a Fountain Pen

You have so reached the end of this lesson. Your fountain pen should be similar to the one you see in the following figure.

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