problem
Hello everyone.
I am an electrician in Ireland, and came across a problem a few days ago. I was investigating why a motor of a washing machine in a commercial laundry would not spin correctly and found the cables going from the tacho generator to the control electronic were causing the problem, I rerouted the cables and found all worked ok. I suspect some form of mutual inductance, the tacho cables only carry a small voltage, but was in a loom with many main voltage cables, Did anyone ever come across a similar problem ? If so what is the best way of identifying the problem, would an oscilloscope be required. Even though I know I sorted out the problem I would like to know the best way of testing for this problem . Thank you for all your help Seamus |
problem
seamus wrote:
I am an electrician in Ireland, and came across a problem a few days ago. I was investigating why a motor of a washing machine in a commercial laundry would not spin correctly and found the cables going from the tacho generator to the control electronic were causing the problem, I rerouted the cables and found all worked ok. I suspect some form of mutual inductance, the tacho cables only carry a small voltage, but was in a loom with many main voltage cables, Did anyone ever come across a similar problem ? If so what is the best way of identifying the problem, would an oscilloscope be required. Even though I know I sorted out the problem I would like to know the best way of testing for this problem . Sounds to me like your experience, which made you suspicious of lead dress as a possibility, was the best troubleshooting tool for that job. A 'scope might have shown you noise on the tach wires, but might not have helped you determine its source. -- All relevant people are pertinent. All rude people are impertinent. Therefore, no rude people are relevant. -- Solomon W. Golomb |
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