[matador]

That’s a fast reply! Thanks.

Ok, I will look a this.

Just for my own knowledge: how is that?
I mean a relay is contact or no contact, haw can he create variations in speed?
Components like capacitors, resistors etc may have their characteristics evolving with heat, time… but a relay, it sticks or it don’t, right? How could he make the speed unstable?

Thanks again.