Toothpick Crossbow

prusaprinters

<p>This is a fully working crossbow designed to shoot toothpicks ! &nbsp;<br>It is remarkably powerful for something this size, it will penetrate cardboard and has a maximum range of 15 meters.&nbsp;<br><br>This is a modular design that allows you to fit which ever Prod (bow) you like&nbsp;<br>they simply slot in and you use a small section of filament or toothpick as a retaining pin.&nbsp;<br><br><strong>3 Part trigger action&nbsp;</strong><br>The trigger mechanism is a remix of <a href="https://www.thingiverse.com/thing:5153589">https://www.thingiverse.com/thing:5153589</a>&nbsp;<br>which is a traditional 3 part trigger mechanism&nbsp;<br>This gives a lighter and more reliable trigger pull&nbsp;<br>as well as being an interesting mechanism to look at.&nbsp;<br>The holes are 1mm intended for sections of 0.8mm paperclip steel.&nbsp;<br>Each part will need careful deburring and trimming to get a smooth low friction operation (especially the nut).&nbsp;<br><br><strong>3 types of crossbow Prod&nbsp;</strong><br>take your pick Decurve, recurve, Elastic&nbsp;<br><br>Decurve<br>This is the D shaped bow, it is modelled on a traditional steel bow and suits PLA's properties,&nbsp;<br>It is a stiff and heavy movement but the design means that the material doesn't actually have to flex that much to produce allot of force.&nbsp;<br>This is the more powerful and reliable design.&nbsp;<br><br>Recurve&nbsp;<br>Taken from a wooden recurve bow shape, this design is far more flexible and springy.&nbsp;<br>The design is more efficient and should be more suitable for light weight bolts.&nbsp;<br>But PLA has its limits and the lifespan will struggle&nbsp;<br><br>Elastic&nbsp;<br>designed to turn this into a sling bow, use small rubber bands joined by thread to make a rubber powered version&nbsp;<br>&nbsp;</p><p><strong>Ammunition&nbsp;</strong><br>designed for 2x50mm toothpicks, cut the point off one end and make some flights from masking tape.&nbsp;<br>If your really keen carve a convex point on them and dip into superglue for better penetration.&nbsp;<br><br><strong>Stringing&nbsp;</strong><br>the best way to string it is to use sowing thread and wrap it round 4-6 times before tying it off, then take off one end of the bow and twist; which will make it shorter and pull it into a single thicker cord.&nbsp;<br><br><strong>Print settings&nbsp;</strong><br>i have provided the 3MF file which i recommend using as it has all the recommended settings pre loaded, &nbsp;i have adjusted all of the individual settings on each part&nbsp;<br>most parts have adhesion helpers as these fine parts have a habit of warping or becoming detached.&nbsp;<br>The action parts come on a tiny raft, Brims shouldn't be needed for the other parts but you may find it more forgiving to use them.&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p>