Quattromike
Well member-known
We've done a bit of work with Kawasaki robotics, they have a hand held pendant controller for teaching moves and modifying the program, when controlling in manual mode there is a trigger on the back of the pendant you have to pull in at all times which has a two stage switch, the first stage is normal use and the second stage cuts all the power and kills the machine. The thought behind it is a relaxed person pulling the trigger will be in control more than someone having a stroke or heartattack or being crushed or electric shock and so on. So basically you have to be composed at all times when you take control. It's actually weighted quite well and comfortable to operate.