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echʘlab Chuck

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For most experiments we need to accurately maintain the transducers in a water-filled tank. So we started our experiments with water-resistant double-sided adhesive or Blu Tack (a reusable putty-like pressure-sensitive adhesive). It is now time to design a more accurate and reusable clamp system. The idea is to create a clamp with 3D resin printing on which we can screw a metal sphere that we can hold on the wall of the container thanks to a magnet. The sphere will allow the transducer to be oriented in all directions. And of course the system will have to be as simple and economical as possible ... which will prove to be quite complicated!

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To Start, some fails...


		A very well designed model from https://www.thingiverse.com/thing:2670620 but a little too oversized for our needs, too heavy and complicated to realize. Sources : Github
		This clamp is simple but the pinch does not work very well because the thread is cylindrical and should have been conical. We observe a pivoting of the jaws in contact with the transducer that tends to eject it when clamping. Moreover this model is light but rather bulky. Sources : Github
		This clamp adds a helical ring which ensures the clamping in 1/3 of turn. We also have a system of double blades that form a parallelogram avoiding the rotation of the jaws but unfortunately the constraints are very important on these spring blades which tend to break quickly. Sources : Github
		With this system we replace with radial spring blades to have something more compact and lighter. Still having problems with the clamping ring that deforms the jaws irregularly when it is turned to clamp the transducer. On the other hand, the ball and magnet system is interesting (the clamp remains so light).. Sources : Github