Bullpup Slingbow

Discussion in 'General Slingshot Discussions' started by PandaMan, Mar 9, 2012.

  1. PandaMan

    PandaMan New Member

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    So my next project is Jörg Sprave's bullpup slingshot rifle. <br>I decided it's a pain cutting it out with a jigsaw. Takes a long time and can be inaccurate. So why do that when my school has a laser cutter? <br>I'm going to try and persuade my teacher to let me use the laser cutter and then it will be precisely cut in about 40 minutes.<br><br>I digitalised Jörg's designs in 2dDesign CAD software and made a couple of very minor tweaks.<br><img src="http://i49.servimg.com/u/f49/17/09/25/25/bullpu10.png" border="0" alt=""><br><br><br>Unfortunately I'll have to wait till Monday to ask, but I just thought I'd share now.<br><br>PandaMan<br>
     
  2. onnod

    onnod Im from Holland, isnt that weird?

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    a laser cutter, that's i very good idea
     

  3. tokSick

    tokSick Senior Member

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    Hi,<br>What material are you gonna use to make it? <br>Is it possible to cut wood with a laser cutter?<br>I thought it would burn.
     
  4. PandaMan

    PandaMan New Member

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    Yes, it does burn a little bit, but it's nothing that can't be sanded off.<br>I will use 12mm plywood.
     
  5. onnod

    onnod Im from Holland, isnt that weird?

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    that will definitely come out nice(that will be the first time that somebody cant wait till Monday:D )
     
  6. PandaMan

    PandaMan New Member

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    <table width="90%" cellspacing="1" cellpadding="0" border="0" align="center">
    <tr><td><span class="genmed"><b>onnod wrote:</b></span></td></tr>
    <tr><td class="quote">that will definitely come out nice(that will be the first time that somebody cant wait till Monday:D ) </td></tr>
    </table>
    <span class="postbody"><br><br><img src="http://illiweb.com/fa/i/smiles/icon_lol.gif" alt="Laughing" longdesc="7"> I am looking forward to Monday... Sounds weird saying that. <img src="http://illiweb.com/fa/i/smiles/icon_razz.gif" alt="Razz" longdesc="9"><br><br>Unfortunately there is about a 50% chance my teacher won't let me. In which case I'll have to try and use my cheap jigsaw.</span>
     
  7. onnod

    onnod Im from Holland, isnt that weird?

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    good luck,<br>just tell him something like that it is good for your technical skills and stuff like that(in the worst case you say you will write a report(everything for a slingshot))
     
  8. PandaMan

    PandaMan New Member

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    lol thanks. I'll think of something. I worked hard on tracing the design from Jörg's PDFs and this will make the job a lot easier and quicker.
     
  9. e_monster55

    e_monster55 New Member

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    is it ok if I take this design? I like it better than Jorg's blueprints, nice and clean, easy to make measurements and adjustments.
     
  10. PandaMan

    PandaMan New Member

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    Yes, you can take it. But the picture I posted won't be to scale.<br><br>Only the 2ddesign schematic will be full scale. You could scale the picture up to the right dimensions, or if you happen to have the software "2DDesign" I could send you the actual schematic.<br><br>I have no problems with you taking those designs, one way or another, because they are still Jörg's but just in a different format.
     
  11. Eggster

    Eggster New Member

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    PandaMan, would you mind posting the 2DDesign file?
     
  12. PandaMan

    PandaMan New Member

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    yeah, sure.<br>I can't attach it to the post, so here's a download link.<br><br><a href="http://www.mediafire.com/?qsz888nj44a0oy6" class="postlink" target="_blank" rel="nofollow">http://www.mediafire.com/?qsz888nj44a0oy6</a>
     
  13. Eggster

    Eggster New Member

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    Thanks a million!
     
  14. PandaMan

    PandaMan New Member

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    No problem. How are you going to use it? Will you print it out or do you have CAM equipment?
     
  15. Eggster

    Eggster New Member

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    I have quite a different design that I am working on, so I just want to use the basic dimentions, e.g. "barrel" length, pulley spacing, rubber mount spacing and the distance between the pulleys and rubber mounts. The body and trigger system will be somewhat different. I can not open the file that you have posted, however. I have 2dDesign V2, but it states that the file is from a later version of the softwae and cannot be opened.<br><br>We have access to a laser cutter at the university, but I am planning on using a steel construction. Would it be possible for you to add the basic dimentions to your schematic or maybe re-post the file in .dxf format?
     
  16. PandaMan

    PandaMan New Member

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    Hmmm... I can't get a .dxf file of it. Let me think of something.<br><br>Edit:<br><br>Okay, save the picture in my first post.<br>Create a new 2dDesign file and make it 700mm by 550mm.<br>Import the picture and make it 700mm wide and make sure the 'Fix aspect ratio' box is selected. Then you can just trace over the design and then delete the picture.<br>Hope that helps.
     
  17. Eggster

    Eggster New Member

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    Thank you. I will give it a try
     
  18. Eggster

    Eggster New Member

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    That helped me getting the dimentions without even having to re trace the schematic. Thank you for the assistance
     
  19. PandaMan

    PandaMan New Member

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    <table width="90%" cellspacing="1" cellpadding="0" border="0" align="center">
    <tr><td><span class="genmed"><b>Eggster wrote:</b></span></td></tr>
    <tr><td class="quote">That helped me getting the dimentions without even having to re trace the schematic. Thank you for the assistance</td></tr>
    </table>
    <span class="postbody"><br><br>You're welcome. Glad to help. <img src="http://illiweb.com/fa/i/smiles/icon_smile.gif" alt="Smile" longdesc="2"></span>
     
  20. e_monster55

    e_monster55 New Member

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    Thanks, all I needed was the picture, I can draw up measurements and other schematics once I print it at regular printer paper size.