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Making an escapement wheel for verge escapement (clock)

Commentaires

7 commentaires

  • Jacant

    Create the basic shape of the wheel.

    Refer to image.

    Draw a line on the top face from the centre to outside edge.

    Move this line with the 'Create Patterns' selected, with the move arrow positioned at the centre of the wheel.

    Start to drag so you have at least three copies showing. Type in twice the number of teeth required.

    Change to Home view. Select one of the segments on the edge of the wheel. Copy and paste it. Now Pull this new face with No Merge the height of the tooth.

    Select the three faces of the new solid, right click 'Full Round'

    Select the tooth and use the Move command as before with the 'Create Patterns' selected. Start to drag as before so you have at least three copies showing, type in number of teeth wanted.

    Combine/Join the bottom solid to one of the teeth. All will be joined as one.

    Delete surfaces and Pattern as no longer required.

     

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  • Laszlo Kapos

    Thanks a lot for the fast support.

    But I have a problem: Your pattern "build" a surface, my line pattern doesn't split the upper surface, the line remain lines:

    Maybe it's a trivial for beginners also, but I don't know the answer. (Correcttion: I made it after some tries in 3D, I've got lines. I switched back to Sketch mode, and back again to 3D: and I have now the missed surface! Is it the correct way?)

    Altough Your description helps me to more understand DesignSpark, my basic challenge is to draw the other wheel. If I could it, then I can design accurately any profile of a clock's wheel (not only a rounded profile). I've just tried to draw to the front surface of tooth a closed curve. This appears on all component members, all teeth. It splits the front surface of the tooth. If I could "Pull" it with "-" (cutter) option, could modifiy the shape of the teeth. Addition works, but cutting gives unexpected result.   

    The "hard work" would be to make a "cutter" (negative to the tooth profile) as a solid. Make a pattern around the center point in the radius of the "basic" wheel. And then use these pattern of solid to cut out from the basic wheel.

    I think, it's exist a simpler solution... 

    Thanks again for Your support! 

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  • Jacant

    But I have a problem: Your pattern "build" a surface, my line pattern doesn't split the upper surface, the line remain lines:

    You could try to Select the edges of the circles and use the 'Project to Sketch' tool.

    This is my interpretation of your 'challenge'

    Draw the circumference of the circle flat in 2D, split it into 12 equal parts, or as many teeth as you want. Draw the profile of one of the teeth as shown using Construction lines. (Right click a line and make it Construction) Once you have the desired shape draw around the part and change to 3D mode. Move the surface created to the centre of the wheel. Pull the surface with the cut option through the wheel. Select the faces of the cut and Move them around the wheel with 'Create pattern' The top of each tooth will be flat. Select it and use the 'Fill' command. Round over the top to suit.

     

     

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  • Jacant

    It may be better to move the new tooth surface to the centre of the wheel, then move it out, away from the wheel.

    You can now 'Project' the surface onto the wheel. Copy and paste this new surface 'Pull, Both ways, No Merge' to create a solid.

    Move this new solid with Create pattern option. 'Combine/Cut' from the wheel.

    Pull the 3 top faces of each tooth with Full Round.

     

     

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  • Laszlo Kapos

    Thank You indeed!

     I'm delighted at the possibilities of DS. 

    The idea of the projection makes me possible to design the tooth profile in 2D. I project it to the cylinder. Copy and paste it. I'm pulling down the base of the wheel until the base of the tooth. The copied front surface of the tooth remains (the projection disappears.) I pull the tooth - with no merge - until the inner face of the base wheel. Round it and make a pattern around the center line.

    It's not for You :), it's for me to remember or anybody other beginner...

    Thanks a lot again!

    P.S.: I calculated the with of the tooth, couldn't split equally the rectangle... Is there a function for this? 

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  • Laszlo Kapos

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  • Jacant

     Bravo.

    I'm pulling down the base of the wheel until the base of the tooth.

    There is no reason to do this. Use the 'Combine/Cut' tool. To cut the teeth from the cylinder.

    I calculated the with of the tooth, couldn't split equally the rectangle... Is there a function for this? 

    Move the vertical line on the left hand side, with the 'Create Pattern' option up-to the other end of the length of the circumference, with a count of 13 = 12 equal spaces.

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