Hamada won't swicth on

[Turbo]

we are plugging in a Hamada 665cd we get forward inch, we reverse inch and feeder air.
bbut when we throw on master swicth it trips can anyone help, checked all the guards
sincerely
"stumped"

 

[junker1984]

Don't know Hamada, but presses I work on use dedicated contactors for inching and running. Do you have a relay logic press? Is it possible the "run" relay is single phasing, causing the overload breaker to trip?