Because I always wanted my own robotic arm I bought one 2 years ago, it was a kit of Velleman a KSR10 the goal was to make it automated so I could control if from my computer. To do this I had to make a H-bridge driver board, which I could control via the parallel port. I made a board that could satisfy these needs but it did not work. So after a while the project was out of my vision. Then about a half a year ago I saw this usb control kit which was made for the KSR10 robotic arm and with that kit the problem was solved. I bought the kit and plugged it in, but after a little time playing with it I found out that the programming software did not satisfy my needs. It was controlled by the time one of the motors was on so if you change the direction in which you where traveling it missed its position because of the gears and their backlash and that made the whole programming useless. So I only did play like 1 day with it and the fun of it was gone…
This was for me a motivation to build a robotic arm that was powered by servo’s which does not lose any steps. At my school there where some Lynx 6 robotic arms, and I decided to build a better one with some other friends from school. The first step was to measure the arms at school and make a raw drawing of it with some modification. Then because the project did not go fast enough for me, I did mill one from 4mm hardboard on my homemade cnc machine, for testing and just to have it already. It came out quite well and it does work properly. It is not finished totally, it misses the gripper but here are some pictures, and a little video. Also there is a total drawing in DXF format, but I did not draw a gripper for it yet and there are some small differences at the design to make it all work better. For Solidworks drawings, ask me.
For drawings, check the thingiverse site:
Here’s the drawing in Solidworks, I first did draw it in Autocad but for the visualization I used solidworks.
With my friends from school we are going to build a robotic arm that is kind of open source and we are going to program it with an arduino. Also there is going to be a infrared receiver, so you can program and control it via a universal remote control. To make it much more interesting we are also going to make a possibility to program it in JAVA via a computer with RS-232. And the most exciting thing is, we are going to program an so called “teach in” method for it so we can move the arm by hand and the arduino or computer is going to record those changes in the potentiometer. Then we can convert those readings and make a pulse signal of it, and send them back to the robotic arm.
This article will be updated with the electronics and stuff, hope you like it!