As many people predicted peopel would have trouble with tipping over. We have built an eight bar that reaches 58 inches and we are having trouble with tipping. I was wondering if anyone had any ideas for passive anti tipping system. We have about a 1/2 inch left. I have used all of my motors and I do not have any pnuematics left.
I will post some pictures tomorow.

My older 8 bar robot was incapable of tipping: https://www.youtube.com/watch?feature=player_embedded&v=ByGBDx7-SYk

Everything on my robots base was very low to the ground and the base was made of steel while the arm was aluminium. Additionally all batteries were at the front and the air tanks tucked in low to the ground. This good weight bias/low center of gravity prevented my robot from tipping.

I recommend you try to create a good center of gravity before building anti tipping systems. Even my more recent 6ft scissor is IMPOSSIBLE to tilt just because all the chassis parts are close the ground.

The reason why I don’t recommend an anti tip is it increases the footprint of your robot which makes building the skyrise and getting around a lot more crowded and just not good or at least as it could be, especially when the robots arm is halfway up and the 8 bar has all that forward reach. Also, the anti tip can easily get caught on cubes with the open squares they have.

However if you want to make an anti tip i recommend having a slider that is kept in by a standoff attached to the arm blocking the slider from shooting out the back(tensioned by rubbe bands). You can see that in this video at the end: https://www.youtube.com/watch?v=sRkAJqTTEs8&list=UUQUZr-i-qUIhgvRNCcbOuTw

Additionally you can do this, but be sure to build it close to the ground and use the same concept as above instead of zipties:[https://www.youtube.com/watch?v=bPSESG6tGSA&list=UUQUZr-i-qUIhgvRNCcbOuTw

I only did it like that with the zip ties because the transmission took up a lot of space and there was no other way.](https://www.youtube.com/watch?v=bPSESG6tGSA&list=UUQUZr-i-qUIhgvRNCcbOuTw)