Motor problem
- Thread starter leeco
- Start date
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yup definitely 3 phase converted to run on single phase
so it may be the capacitor
the neutral will be common to either black or grey check the soundness of these connections on the cap
if you have a multimeter you can do a quick test on the windings (some will measure capacitance too)
where is the machine located?
if you have 3 phase power available then the motor will run much better on 3 phase
Matt
so it may be the capacitor
the neutral will be common to either black or grey check the soundness of these connections on the cap
if you have a multimeter you can do a quick test on the windings (some will measure capacitance too)
where is the machine located?
if you have 3 phase power available then the motor will run much better on 3 phase
Matt
No probs and the cap will cost you around £7 from RS components here
Make sure you get one designed for continuous duty (running not starting)
Matt
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I bought one of these
http://www.ebay.co.uk/itm/250717035891?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649
The same as the one in that white box. I just hope it fixes it but looking at the motor there isn't realy that much that can go wrong with them.
Thanks for your help.
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Sorry I missed this. The waights are in the same position on ether side of the motor.
That motor is dual wound. This means it is designed to run either at 400V in star or 230V in delta.
The delta can be achieved via a single phase input invertor which creates a 230V three phase output. This would also enable speed control.
Your budget might not allow for this though
The delta can be achieved via a single phase input invertor which creates a 230V three phase output. This would also enable speed control.
Your budget might not allow for this though
If that capacitor doesn't sort it out, then might even be worth trying to offset the two weights by 90 degrees, Just thought for a moment, should both the weights really be in the same angle of plane, with respect to the shaft?
Or perhaphs one of the weights should be offset to create a twist and impact motion, I don't know, I am just guessing and it might pay to try it.
Another thing is, I have often played around with smaller DC electric motors with unblanced weights at the shaft, my wife is hearing impaired, she has one of these viberator pads that she puts under her pillow, to wake her up!
(This might now turn into an embarrasing subject....does it remind one of a viberator!!!) lol
Yes, so once it went wrong, and I tried fixing it, the die cast weight simply could not be screwed on to the shaft as the threads in the die cast material had stripped , so the shaft just turned, so I made another similar weight using a piece of metal, and drilled and tapped it and attached it to the shaft, I then noted that my weight I had cut was bigger as I still had to trim some material off the weight to fit it in the case, so the heavier the weight the slower the motor speed, thats what i noticed, so may be you have to arrange the two weights such that you get reasonable impact as well as the motor speed. Just a thought.
Another fact, if you take a hammer for instance, if you strike it slow, its impact will be less, if you struck it fast, its impact will be higher due to higher kinetic enrgy, similarly, the speed of the shaft may have a proportional response to the impact, but by having the two weights too heavy on one end of the shaft, it may impair the motor from reaching its most effective speed, so before ordering that cap, I would try and off set the weights, and see where is the best combination for the offset angle.
Or perhaphs one of the weights should be offset to create a twist and impact motion, I don't know, I am just guessing and it might pay to try it.
Another thing is, I have often played around with smaller DC electric motors with unblanced weights at the shaft, my wife is hearing impaired, she has one of these viberator pads that she puts under her pillow, to wake her up!
(This might now turn into an embarrasing subject....does it remind one of a viberator!!!) lol
Yes, so once it went wrong, and I tried fixing it, the die cast weight simply could not be screwed on to the shaft as the threads in the die cast material had stripped , so the shaft just turned, so I made another similar weight using a piece of metal, and drilled and tapped it and attached it to the shaft, I then noted that my weight I had cut was bigger as I still had to trim some material off the weight to fit it in the case, so the heavier the weight the slower the motor speed, thats what i noticed, so may be you have to arrange the two weights such that you get reasonable impact as well as the motor speed. Just a thought.
Another fact, if you take a hammer for instance, if you strike it slow, its impact will be less, if you struck it fast, its impact will be higher due to higher kinetic enrgy, similarly, the speed of the shaft may have a proportional response to the impact, but by having the two weights too heavy on one end of the shaft, it may impair the motor from reaching its most effective speed, so before ordering that cap, I would try and off set the weights, and see where is the best combination for the offset angle.
no its not, it's a dual voltage motor, description is correct though (for dual voltage)
dual wound motors are different again
but yes you could drive it three phase delta through a VSD, if the op has some spare dosh
Matt
variable speed drive
Like this 1
http://www.ebay.co.uk/itm/Altivar-1...ial_Automation_Control_ET&hash=item3a711a3a38
Would this work or does it have to be the right type?
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I wouldn't have a clue as to how to wire this particular thing, you will need instructions as these are programmable units, but is this really what you need for your motor? i would have thought you would just try a new cap and get away with it or as I suggested try and adjust one of the weights to see if that improves viberations. Too heavy a load can inhibit the motor speed and so I would have had a go at one of the weights to start with.
I should have the new cap tomorrow and I don't think the weights have slipped as they are too tight to move and I have found this picture of the motor and they show the weights in the same position. But if the cap dosn't sort it I will have a mess with the weights.
I would test the windings first
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