Now take it out and drill holes for the attachment hinge on the servo (circled red in the attached image), there should be a hinge on either side of the servo. If you cut it correctly, it should slide in perfectly. This will make setting up your code lots easier later on in the process!įirstly, mount your servo in the cutout you made in the upper rotation part. Important note #2: Before adding the servos to the frame, make sure to turn them entirely one way either with your hand or by running a script. There will be no way to access the top of the blade once it's mounted! Important note: before you start mounting your servos, make sure your servo wing is properly secured to the servo by using the corresponding screw. It is easiest to start with the rotation parts and work your way down to the arm parts. Failing to do so could result in trembling motions and or other defects and instabilities. It is very important to tightly fasten components to the frame properly. All set? Let's move on.Ĭongratulations on coming this far! Now we have all our tools, all we have to do is to properly attach them. One will get 1 cut and the other one will get two cuts. Cut both of them according to the picture. Match the size of the cutout according to the servo size that you will place in it. This strip gets one cut, which is for the upper arm servo. In order to get the cutouts right you want to measure up the size of the servos you're going to use. 2x aluminum strip for the rotation mechanism.2x aluminum strip for upper arm and lower arm.If you followed the previous step correctly you should now have: The first picture in this step shows the machine and the way it works.įirst of all, there are four holes we have to create for the standard arm that uses 3 servos to move. The way you want to cut these things is actually by using a punch machine, also known as a 'pons' machine in dutch. So you got your aluminum cutouts all sorted out? Great! The next step is to actually process the aluminum in a way so that we can insert our servos into them. I strive to explain everything in detail so that Arduino newbies like myself can follow this guide without any major issues. A laptop or computer that can run Arduino software.ĭifficulty: average - requires solid knowledge of basic Arduino functions and tools.General tools (a set of screwdrivers, screws, hammer, workbench).Arduino breadboard + long jumper wires.I chose not to include that in the steps because my wood working skills are terrible and the point of the arm is that it is modular, which means you could basically hang it anywhere and it will work! Feel free to design a proper mount that is not held together by tyraps. Please note that I will not go into making the wooden mount for the arm. Please feel free to experiment with different materials or code! Hi, my name is Frans and in this instructable I will teach you how to create a bionic arm from scratch! Our goal is to create a stable and reliable arm mainframe that is able to move much like a real human arm would! Before we start I will list all the required materials.
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