Problem with Crawler Kit for Boe-Bot

dpetra

I'm having problems getting my bot to travel in a straight path of about 2 feet. The servos are centered and all of the connections appear to be sliding freely. I can't tell from the video on the Parallax site what the normal gait mechanics are supposed to be for this kit as the camera moves around too much. I had a similar problem with the tank tread kit but that was because the nuts have a tendency to loosen over time.

Anyone else have any experience with this problem?

Mike Green

This is normal for the crawler kit (and the tank tread kit and even with the plain boebot). R/C servos are not exact things and neither the crawler mechanism nor the tank tread mechanism are highly precise. With all the movement involved in the crawler action, any small variation from one side to the other will show up over small distances (not to mention the small, but cumulative amounts of slippage along the ground). You will have to adjust your servo pulse widths via trial and error to get more symmetrical movement and your boebot crawler will still tend to veer to one side or another.