How to calculate servo strength && my micro arm
July 14, 2011
Do what I say, not what I do...
I have told a lot of folks that it is very hard/impossible to build an arm using micro servos. As the arm gets longer and the weight of each servo along the arm is added, the base servos can't keep up. Well, I don't believe myself. Now that I have discovered the wonder of Plastruct, and the lightness thereof, I am going to make a stab at this one.
First off, I wanted to do a little math on the actual strength of a micro servo and thus, how long each segment of the arm can be. I took a little video and whadda ya know, I think I may have explained servo strength along the way.
Watch the video for more info --The servo used is the "standard blue" servo. HXT-900 to be exact and rated at 1.6 Kg/cm --or-- 1600g/cm --In the video, I rounded down to 1.5 or 1500g because A) it is easier math and B) I am running at 5v not 6v.