Good idea, everyone can learn from this type of stuff. They say flight instructors learn more about flying from their students. Maybe the senior maintenance technicians can even pick up a thing or two from those asking maintenance questions.

The motor start for this old system is a contactor panel. It is a series of contactors that close in sequence using stepping resistors to ramp up the current to the motor.

These old motor starter contactor controls are barbaric by today's standards, but they actually do the job quite well overall. As a matter of fact, this contactor control has got to be over 50 years old as is the DC motor.

Alright, here's an old Burr Brown keypad that we still use. I guess this is an obsolete HMI keypad...



This technology is long gone but we're still using these and they still work. I'll probably have to upgrade when my last one goes south.

Hello,
Since you guys are offering free advice, how do you test an obsolete DC motor?

I've got an old motor with brushes and no name tag. I know the motor runs off of 240 volts DC. It's not making any attempt to move. Looking for a methodical troubleshooting procedure for a motor with unknown specs. I know this sounds like a strange question, but I'm looking for advice on the best method of testing since I'm fairly certain this is a vintage obsolete DC motor and I may be looking at upgrading the motor and control if I can't get this going.