[quote author=maxxb link=topic=1480.msg5964#msg5964 date=1271688048]
I send you my work.
I just want that my representation do the same things than yours, when I increase Qi, the speed increase, and when we arrived on the max, the system stop. But I don't know what I should take in the variables to do that. Could you help me please ?

I do not know what do you mean by "do the same things than yours"???
the speed increase :the speed of what ???
arrived on the max: what reach maximum???

Would you explain what you want to do in detail? I do not know how to help if I can not understand what you want. ???