Hello again,
A few weeks ago, I posted pictures and questions about headlights and interior lights for my Silvine ho Trolley bus, which is similar to an aristo craft, Eheim, or Brawa ho trolley bus .I got a lot of help and ideas from that posting, however, in the meantime, another problem popped up.
When I reassembled the bus, the motor started binding. In other words, I could feel it "humming", but it would not turn when energized. Interestingly, I thought the gears from the motor to the rear drive wheels were binding, and indeed when I disconnected them, the motor ran like a champ. However, as I continued working on it, I found that it woud not run at all, but "hum" when energized. When I turn the motor with my fingers, it spins freely without any drag or binding. This binding only occurs when energized through the brushes.
My knowledge of these motors is limited, but did try a few things, without success.
1. When I energize each brush from the transformer, it hums, as if the motor is binding.
2. With my multi meter I tested for continuity between the two brushes, (which I've marked in a picture, one which I believe to be positive, and one which I believe to be negative) touching one lead to each brush, and my multi meter beeps, indicating current flowing from brush to brush, through the motor.
3. I've sprayed it with electronic cleaner, which made no difference.
4. Interestingly, when I hook up negative power lead, from the transformer, to what I believe to be the negative lead on the motor, and touch the the positive power lead from the transformer to the motor "axle?" it runs great. I circled in yellow what I'm calling the motor axle in an attached picture for clarity.
5. I removed one brush, the one which I beleive goes to the positive on the transformer, cleaned it, reinstalled -which made no difference.
Please, ask me any questions-I need help!!
I hope this clearly explains what I've attempted, failed and what is going on with this thing. Hopefully, someone will have some ideas on what I can try to fix it.
Thanks,
Tom
A few weeks ago, I posted pictures and questions about headlights and interior lights for my Silvine ho Trolley bus, which is similar to an aristo craft, Eheim, or Brawa ho trolley bus .I got a lot of help and ideas from that posting, however, in the meantime, another problem popped up.
When I reassembled the bus, the motor started binding. In other words, I could feel it "humming", but it would not turn when energized. Interestingly, I thought the gears from the motor to the rear drive wheels were binding, and indeed when I disconnected them, the motor ran like a champ. However, as I continued working on it, I found that it woud not run at all, but "hum" when energized. When I turn the motor with my fingers, it spins freely without any drag or binding. This binding only occurs when energized through the brushes.
My knowledge of these motors is limited, but did try a few things, without success.
1. When I energize each brush from the transformer, it hums, as if the motor is binding.
2. With my multi meter I tested for continuity between the two brushes, (which I've marked in a picture, one which I believe to be positive, and one which I believe to be negative) touching one lead to each brush, and my multi meter beeps, indicating current flowing from brush to brush, through the motor.
3. I've sprayed it with electronic cleaner, which made no difference.
4. Interestingly, when I hook up negative power lead, from the transformer, to what I believe to be the negative lead on the motor, and touch the the positive power lead from the transformer to the motor "axle?" it runs great. I circled in yellow what I'm calling the motor axle in an attached picture for clarity.
5. I removed one brush, the one which I beleive goes to the positive on the transformer, cleaned it, reinstalled -which made no difference.
Please, ask me any questions-I need help!!
I hope this clearly explains what I've attempted, failed and what is going on with this thing. Hopefully, someone will have some ideas on what I can try to fix it.
Thanks,
Tom
