Flexible and articulated crab gripper

cults3d

This is the flexible jointed crab model. With its flexible joints, the crab is able to grab and hold on to many objects. Pull on the handle to unfold its legs, then release so that it closes them again. The model consists of a total of 202 pieces to assemble (without glue), but the majority of the pieces are small connectors. Materials required: strong and flexible filament. fine, fairly flexible, strong thread (e.g. nylon) Available parts: You can choose to print this crab any way you like as there are many parts that allow you to customize its assembly. The joints can have as angle 45°, 90°, 135° and 180°. Each part of the legs or claw can be size 1, 2, 3 or 4. Size 1 is the largest, and 4 is the smallest size. In the files the sizes are displayed at the end: joint [1] for example. A leg consists of joints, joint connectors, solid parts and attachments. There is also the paw tip, or clamp located at the end of each paw. Warning: The first joint of the legs, connected to the body must be size 1. The first claw joint is size 3. Assembly: For my crab model, I assembled the legs this way: 8 small nail-shaped attachments (2 of each size). 180° joint [1] + connector [1 to 2] + solid [1 to 2] 90° joint [2] + connector [2 to 3] + solid [2 to 3] 90° joint [3] + connector [3 to 4] + solid [3 to 4] 90° joint [4] + connector [4 to 4] + leg tip [4] I assembled the clamps this way: 6 clips in the shape of small nails Connector [3 to 3] + 135° joint [3] + connector [3 to 2] + solid [3 to 2] joint 135°[2] + connector [2 to 1] + solid [2 to 1] clamp joint [1] + clamp_1 [1] + clamp_2 [1] Putting the wires in place: 1) After assembling the crab: 2) Start by cutting 8 wires about 14 cm long for the legs, and two 10 cm wires for the claws. 3) Make one or more knots at the end of each wire and insert them into hole disc. 4) Pass the wires through the holes present in the body of the crab, so that they come out on top of each leg. 5) Thread the wire through the joints of the legs. Preferably use only the second holes in the joints (the wire should only go through each leg/clamp joint once, to avoid too much resistance when pulling the wires). 6) For each leg/clamp: With the leg normally bent, pull the wire coming out of it as far as it will go, then mark where the wire comes out of the leg. 7) Then hold the tab unfolded so you can tie a knot over the marked area of the wire. 8) The legs should unfold when the handle is pulled, and fold back when the handle is released. It is also possible not to use a wire to control the crab, it remains the same but will be more complex to handle.