that do bring me memories with grand dimmer switches yeah they are pretty picky to run it and also one jobsite i was working they use large dimmer switch for wound routor motor ( the armture is controlled by dimmer) to change the speed aka early speed controller for variable speed motour i see that in one compaine to use that for milling machine the motour rather is large (450 HP ) and use big stacks of it. it was about 12 dimmers with common shaft with wormgear motour with back up hand crank . i will expain more later on the time how that run

merci marc

Pas de problme,il marche n'est-ce pas?"(No problem, it works doesn't it?)