Visualize It - Front View Its important to first understand the shape of the door knob before modeling it. For this silhouette or driving curves prove useful. Identify the driving curves of the door knob — those curves that actually drive the finished shape of the surfaces. All you need to do on in the first few steps is read and understand. The top view of the door knob is as shown in figure. |
![t3301 t3301](http://lh4.ggpht.com/-Fv-qezwT41c/Uqd4w6ydraI/AAAAAAAAC_E/Kv3ngErE2Us/t3301_thumb.gif?imgmax=800) |
Drawing the profile - Front view Start with creating a sketch in the the x-y plane. Using the Curve tool, create the outline of the door knob. See figure. |
![t3302 t3302](http://lh4.ggpht.com/-4wza2aT8IbY/Uqd40QE_g5I/AAAAAAAAC_k/Gp6pft9NXGM/t3302_thumb.gif?imgmax=800) |
Front Side Curve Draw a circle in a plane parallel to the x-z plane (front plane) and passing through the end points of the top view curves. See figure. Connect the circle well to the end points of both the curves. |
![t3303 t3303](http://lh5.ggpht.com/-fa-thqB9spY/Uqd416ECzWI/AAAAAAAAC_0/LTzll9x27n8/t3303_thumb.gif?imgmax=800) |
Right Side Curve Draw an ellipse in a plane parallel to the y-z plane and passing through other end points of the top view curve. See figure. Connect the ellipse well to the end points of both the curves as shown in figure. |
![t3304 t3304](http://lh3.ggpht.com/-USX5OLeRUH0/Uqd43V1Cq1I/AAAAAAAADAE/kj71m7ZNZLY/t3304_thumb.gif?imgmax=800) |
The BlueSurf - First Curve Click the BlueSurf tool on the surfacing toolbar. Select the circle on the left. | ![t3305 t3305](http://lh6.ggpht.com/-AeWt4XHDFLQ/Uqd46R3xyQI/AAAAAAAADAk/eejJWexilJc/t3305_thumb.gif?imgmax=800) |
The BlueSurf - Second Curve Then select the ellipse on the right. | ![t3306 t3306](http://lh3.ggpht.com/-pf4MF6iX_Hk/Uqd472-4NQI/AAAAAAAADA0/pdV4PXrKW3s/t3306_thumb.gif?imgmax=800) |
BlueSurf Appears Click accept and then Preview. A BlueSurf spanning the two cross-sections along a straight line will be created as shown in figure. You need to guide the bluesurf along the two top view curves. |
![t3307 t3307](http://lh3.ggpht.com/-Ig2kDCfpN74/Uqd4-s1plVI/AAAAAAAADBU/0Qq91hlzim8/t3307_thumb.gif?imgmax=800) |
Add a Guide Curve Still in the BlueSurf command, Click the Add Guide Curves button on the ribbon bar. Select the curve as shown and click accept ![accept[4] accept[4]](http://lh6.ggpht.com/-cw5bMqeKBo8/Uqd5Bq8QBsI/AAAAAAAADB0/fKus5XDaRpA/accept%25255B4%25255D_thumb.gif?imgmax=800) |
![t3308 t3308](http://lh5.ggpht.com/-Ry_YFyFw7fE/Uqd5DFXdXjI/AAAAAAAADCE/cNcdg-B51bc/t3308_thumb.gif?imgmax=800) |
BlueSurf changes Form - Curve 1 The BlueSurf changes its form as shown in figure. | ![t3309 t3309](http://lh3.ggpht.com/-ndVU9I7zpFE/Uqd5FJQXFCI/AAAAAAAADCU/xQMx9xQZjIg/t3309_thumb.gif?imgmax=800) |
Add Another Guide Curve Similarly, select the other curve as shown in figure. Click the accept and then the Preview button. Click the BlueSurf Options button on the ribbon bar. In the dialog box that appears, take the Standard Tab. Under End Capping, select Close ends. then OK. Click Finish. |
![t3310 t3310](http://lh3.ggpht.com/-Cpor5uuiSqA/Uqd5IDDjLjI/AAAAAAAADC0/N95FOFyk9SU/t3310_thumb.gif?imgmax=800) |
BlueSurf Created A BlueSurf, as shown in figure, is finally created . This surface spans the circle and the ellipse and is guided by the two curves. | ![t3311 t3311](http://lh3.ggpht.com/-hkoC_BkIPW8/Uqd5JuwVfgI/AAAAAAAADDE/JXUGwGdJAaU/t3311_thumb.gif?imgmax=800) |
Surface to Solid Click the Thicken tool on the Features toolbar. The Thicken tool is in the same flyout as the Thin Wall and Thin Region tools. Select the BlueSurf to thicken. Use a small value of 1 mm to thicken in any direction. |
![t3312 t3312](http://lh3.ggpht.com/-XECS6qfnoyg/Uqd5Mk69gzI/AAAAAAAADDk/15HrfDzOpF8/t3312_thumb.gif?imgmax=800) |
Door Knob Ready Finally, add rounds to the circle and ellipse part for aesthetics, etc. Apply your favorite colors (brass, bronze, etc.) using the Part Painter. | ![t3300[4] t3300[4]](http://lh5.ggpht.com/-feFg56pbhr0/Uqd5OLTBkcI/AAAAAAAADD0/zZsr2SCE5Ds/t3300%25255B4%25255D_thumb.gif?imgmax=800) |
More Aesthetic From an even more aesthetic point of view, you can make one of the top view curves a little wavy. This will make the door knob conform to your fingers. | ![t3313 t3313](http://lh6.ggpht.com/-6Av-WbxtMqI/Uqd5PUg1gBI/AAAAAAAADEE/3JkQ5xAfnCo/t3313_thumb.gif?imgmax=800) |
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![cMayoCADH cMayoCADH](http://lh3.ggpht.com/-7gLR2-uU90w/Uqd5QOSL9rI/AAAAAAAADEM/Y8nb3GLBoRo/cMayoCADH%25255B5%25255D.jpg?imgmax=800) |
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