Instability of My climbing Robot

[wise318]

I built a climbing robot using suction pad and dc motor. However i Find the robot is instable.. It sometimes overshoot on certain steps and I have no Idea is it due to PID controller. I have not tune the PID as I am not familiar. May I know what is consider high PID and how to optimise it. And how PID controller affecct the perfromance of my Robot.

TG Programming for motor

[wise318]

Anyway My robot is Something like this with 2 axis X and Y are driven by motor to rotate the suction pad to the ground or the ceiling. The axis can be adjusted

[Admin]

It sometimes overshoot on certain steps and I have no Idea is it due to PID controller. I have not tune the PID as I am not familiar.

Overshoot is caused by a gain set too high. Look at your code and reduce the gain until it stops overshooting.

Google around for PID controllers to learn more.