lookass.ch > Projects > Electronics > Spider Robot
 
6-legged Spider Robot
Dec 21, 2006 - Dec 27, 2007

Project Description
I had the idea to build a spider robot with 12 RC servos, 2 used for each of the 6 legs. I found a lot of information on the internet, for example a spider robot construction kit on lynxmotion.com (see the picture on the right).
Further, I decided to buy a serial device, to control the robot from my computer. You can find more information about the building process and the used devices below.
  Lynxmotion kit:
  Idea:

Pololu 16 Servo Controller
I bought a 16 Servo Controller from Pololu which can be attached to the serial port of my computer. It's a small electronical device which costs about $ 50 bucks and has to be assembled (cheaper than the preassembled version).
It was quite a bit of work to solder everything and make sure that the different circuits don't get damaged.
  Asssembling:
  Complete:
There are some example codes on the web on how to access the servo controller from a pc. GPSBots hosts an example in C++ (click here) and one in Visual Basic (click here). It's important that a 'straight through' serial cable (RS232 DB9) is used!

First Spider-Leg prototype
This is a prototype leg for the Spider Robot. It's made of balsa wood and has a dual pivot element. Two RC servos are used for the circular motion. Unfortunately, the margin is pretty wide and it will probably not bear the 2 kg robot when it's finished. I'm looking forward to create a prototype leg with a so called C-Bracket from lynxmotion.   Straight:
  Flexural:

Useful Links:
http://www.rc-kunstflug.de/tut/servos.htm (Servo torque table)
   
 
 
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