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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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#1
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Small DC motor question
Hi,
I have a couple of questions concerning a small dc motor that operates a moving display track. It uses a 15 volt 400ma adapter which checks out fine. The motor powers a sliding arm that reverses when it reaches the end of the run and vice versa. What I am having trouble with is keeping the motor running. After a minute or so the motor quits, when I disconnect the motor and wait a minute or so and re-connect it, it runs again for another 15 seconds. I went out and purchased 2 new similar motors and they do the same thing. If I hook the motor up directly to the ac adapter the motor will run with no problems. The adapter powers a little circuit board that houses the electronics for the reversing switch, from here the wires go to the motor. Is the problem in the switch or board? Are there motor problems? Thanks in advance for the help. |
#2
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Small DC motor question
"cool jer" wrote in message ups.com... What I am having trouble with is keeping the motor running. After a minute or so the motor quits, when I disconnect the motor and wait a minute or so and re-connect it, it runs again for another 15 seconds. Is it getting hot? How does it run with no load? |
#3
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Small DC motor question
Homer J Simpson wrote: "cool jer" wrote in message ups.com... What I am having trouble with is keeping the motor running. After a minute or so the motor quits, when I disconnect the motor and wait a minute or so and re-connect it, it runs again for another 15 seconds. Is it getting hot? How does it run with no load? No, all three motors run cool. It runs fine with no load if hooked directly to the ac adapter. When hooked through the wire leads coming off the control board it slows down and stops whether it is no load or load. |
#4
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Small DC motor question
"cool jer" wrote in message oups.com... No, all three motors run cool. It runs fine with no load if hooked directly to the ac adapter. When hooked through the wire leads coming off the control board it slows down and stops whether it is no load or load. Checked the voltage under load? |
#5
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Small DC motor question
On 14 Nov 2006 19:48:04 -0800, "cool jer"
wrote: Homer J Simpson wrote: "cool jer" wrote in message ups.com... What I am having trouble with is keeping the motor running. After a minute or so the motor quits, when I disconnect the motor and wait a minute or so and re-connect it, it runs again for another 15 seconds. Is it getting hot? How does it run with no load? No, all three motors run cool. It runs fine with no load if hooked directly to the ac adapter. When hooked through the wire leads coming off the control board it slows down and stops whether it is no load or load. Maybe that control board is defective. Try connecting an LED in place of the motor, |
#6
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Small DC motor question
cool jer wrote:
Hi, I have a couple of questions concerning a small dc motor that operates a moving display track. It uses a 15 volt 400ma adapter which checks out fine. The motor powers a sliding arm that reverses when it reaches the end of the run and vice versa. What I am having trouble with is keeping the motor running. After a minute or so the motor quits, when I disconnect the motor and wait a minute or so and re-connect it, it runs again for another 15 seconds. I went out and purchased 2 new similar motors and they do the same thing. If I hook the motor up directly to the ac adapter the motor will run with no problems. The adapter powers a little circuit board that houses the electronics for the reversing switch, from here the wires go to the motor. Is the problem in the switch or board? Are there motor problems? Thanks in advance for the help. How does it sense the end of travel to reverse? I suspect a problem with the sensors or board, it's gotta be something really simple, the motor is obviously fine. |
#7
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Small DC motor question
cool jer wrote:
Hi, I have a couple of questions concerning a small dc motor that operates a moving display track. It uses a 15 volt 400ma adapter which checks out fine. The motor powers a sliding arm that reverses when it reaches the end of the run and vice versa. What I am having trouble with is keeping the motor running. After a minute or so the motor quits, when I disconnect the motor and wait a minute or so and re-connect it, it runs again for another 15 seconds. I went out and purchased 2 new similar motors and they do the same thing. If I hook the motor up directly to the ac adapter the motor will run with no problems. The adapter powers a little circuit board that houses the electronics for the reversing switch, from here the wires go to the motor. Is the problem in the switch or board? Are there motor problems? Thanks in advance for the help. its the control board, cant be anything else. NT |
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