I have never seen this happen to a motor before. What could have caused the failure?
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Re: Fried motor
WOW looks like someone connected to high voltage.
Or the communicator got very dirty = heat.
another thing if it is a 3v motor someone may have connected to 12v high current source.
What did it come from?My pc
CPU : AMD PHENOM II x4 @ 3.5Ghz
MB : ASUS M4A89TD PRO USB3
RAM : Kingston ValueRAM 16gb DDR3
PSU : Cooler Master 850W Silent Pro
GPU : ATI Radeon HD 6850 -
Re: Fried motor
It came from a low-quality electric toothbrush that was powered from a 2.4V NiCd battery. The inside of the toothbrush body and the outside of the motor were coated in a gray film.Last edited by lti; 01-12-2012, 07:01 PM.Comment
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Re: Fried motor
That is crazy.
After looking at it more it looks like they greased the communicator.My pc
CPU : AMD PHENOM II x4 @ 3.5Ghz
MB : ASUS M4A89TD PRO USB3
RAM : Kingston ValueRAM 16gb DDR3
PSU : Cooler Master 850W Silent Pro
GPU : ATI Radeon HD 6850Comment
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Re: Fried motor
Just a bog standard 180 motor. Looks like the commutators probably arced a lot through that grease covering the contacts and it burned them up.
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"pokemon go... to hell!"
EOL it...
Originally posted by shango066Originally posted by smashstuff30guilty,guilty,guilty,guilty!
guilty of being cheap-made!
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Re: Fried motor
It looks like it's just grease to me, burnt grease. The motor doesn't work anymore?Comment
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Re: Fried motor
No, it doesn't work. I can't get it to spin for more than half of a revolution.
One of the brushes is shorter than the other three (this motor uses two brushes per terminal) and has been bent so it could still make contact. That shows how cheap the motor was.Comment
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Re: Fried motor
I cleaned the grease off the commutator and brushes today and discovered that the shorter brush had actually worn down so far that the end broke off. The other brush on that side of the motor has a hole worn in it. Strangely, the other two brushes look fine.
Also, I put the back cover on it, spun the shaft a few times, heard a loud snap, and it works now.Comment
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Re: Fried motor
Here ar some pictures of the motor with the grease removed. You can see the worn brushes. You can also see that the commutator is worn, especially at the edges of the bars.
It appears that the motor driver circuit puts a lot of stress on the motor. There is another version of this toothbrush that runs from two AA batteries, and the motor doesn't wear out in that version. Why would that happen?
When I first took this motor apart, I thought that the black grease splattered inside the housing was actually the remains of the commutator.
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Re: Fried motor
Many of these cheaper, small motors have cheap non-graphite (usually copper) brushes that wear out fairly quickly, especially if the motor is subjected to dust, dirt, or sudden high start-up voltages. The grease is actually there to slow down the wear of the brushes, but they do wear down eventually. The graphite brushes, on the other hand, will last much longer. Motors with graphite brushes also won't have any grease on their commutator - so don't put any if you take one apart. They also have a bit more resistance when you try to turn them by hand.
I'm not really sure if anyone even makes these 180-sized motors with graphite brushes. Some of the 260 and 280 -sized are for sure. From what I've seen: Mabuchi offers both, Sun Motor are mostly graphite, Super Jack are mostly non-graphite (copper). Of course, this is only for the small sized motors. 360 -sized ones and above all have graphite brushes since they draw a lot more current, resulting in much more arcing between the brushes and the commutator. If copper brushes were used, they would wear down too quickly.Last edited by momaka; 02-21-2012, 11:56 PM.Comment
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Re: Fried motor
This motor does use copper brushes and so much grease that it sprays out of the ventilation holes in the motor's case when it spins.
This motor is marked "Action Motor," and it was probably the cheapest motor the manufacturer could find. However, it runs smoother than the size 180 "Hing Lung" motor in my parts collection.Comment
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Re: Fried motor
High quality! Made in China! You buy!
End of story.
"Tantalum for the brave, Solid Aluminium for the wise, Wet Electrolytic for the adventurous"
-David VanHornComment
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Hi,
i am asking for some Help.
I have one of these Nescafe Aeroccino (Milk Frother) things with a bad motor.
The Motor didn´t start anymore and internet is full of users just swapping the motor for a Mabuchi RF-500TB-12560.
So i got a few of these from Banggood.
I swapped the motor and now i have a new fault condition.
In a working Frother you would press the start button, it will light red and work for a few minutes.
If you press longer it will light blue and just mixup the milk.
With the new Motor it just starts... -
hi there,im having a look at repairing a wood lathe for my dad,(charnwood w821)the problem is when turning up the variable speed control,the motor starts to stop and start by itself,if i continue to turn up the speed it will trip the mcb in the consumer unit,there is also a slight smell of burning from the speed controll box.,Another strange symptom is the lathe can be unplugged from the mains after switching it off and the motor will spin a couple of times by itself,so far ive put a new speed controll potentiometer on and new motor brushes,ive also tested the motor windings and everything looks... -
(TL;DR skip the first paragraph)
I encountered my first dead motor run capacitor at a customer this week.
For some fields I guess it is a very common occurrence but the usual way for industrial machines here is to use 3-phase motors.
(Unless a servo motor makes more sense that is).
But for some reason this 3-phase machine uses a 1-phase motor for its liquid coolant pump.
The pump would run but sometimes trip the 10A breaker.
I monitored it starting and stopping for over an hour until it finally stopped in a specific spot between its windings:
Then it could... -
Hi all forum members,
Found this unknown motor discarded in a junk yard and took home for learning experience. By the look of it, I suspect it is taken out from a type of air blower probably running on ac power. I used digital multimeter on ohm/resistance scale and it doesn't read anything on those 2 black wires. So, this motor is not shorted and should be good to run.
Correct me if i am wrong on the initial test.
Can anyone kindly advice on how to test run this motor based on visible external two black wires. Fyi, i don't see any marking on the motor body nor smell anything... -
And for today's “Other Weird Devices” thread, let's have a look at an Aquarius WaterPik WP-100W water flosser. What is it? Apparently, it's kind of a power washer, of sorts, for cleaning teeth & gums. Who knew these existed, right?
A family friend asked me to take a look at their older one, since it stopped powering On. So let's have a look at what went wrong.
First, a view of the box (note: it's from a newer model) and the device itself:
^ Is it me, or does anyone else find it a little humorous how the box says it's “ADA Accepted”?...
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