You cannot measure armature resistance and get a sensible reading with that type of meter, it will look like a short circuit because the resistanc is very low. Also, if there is a shorted turn on one of the windings, that will not be detectable either. There is a way to test this - use 6v A.C. and measure the current of each winding pair by connecting across opposite copper strips on the commutator, a similar level of current should be observed with each measurement. A shorted turn will show as higher current or an open circuit will show zero current. As well as cleaning the commutator, each gap between copper strips should be cleared of debris as well. Ensure that there is no connection between the commutator and the armature body. Hope this helps.
Generally handy men is good with idea of tune-up. Just few recomendations from my experience. Never ever use files for commutators at home. Just sand paper different grit 100, 200, 400. Turning by power drill good but must be at higher rpm. Carbon residues from the grooves could be cleaned with utility knife. Also woud be better to blow off all armature from dust with compressed air, if possible.
hi handsome. you me laugh. thanks. I have a 2014 kobalt km210 electric lawn mower, and this is exactly what I need to do to mine. I found it on the side of the road,free. I removed the cover and the carbon was full of metal debris, so I used a wire brush and got the spring to retract and the carbon has 80% left , one side chiped off as I was cleaning it. I examined the copper and it needs cleaning, I thought and said to myself, I know who can teach me , someone from India. I searched for carbon brushes and here you are. I'm happy your here . thank you.
Its not shorting, the beeping is a good thing, its showing there is no dead bars on the commutator. The best thing to do is to check resistance and have it checked on a growler tester.
i think it's not shorted, it beeps normally if your in buzzer mode. you must check for resistance value near to an ohm. you might as well check if it is high amps when it runs,refer to the output specs of the unit.
I thought so too. If one or two of the commutator bars beeps yes, but not all perhaps an analog meter would be ideal I guess. This video helped me a lot as my sander carbon brushes broke inside and damaged the commutator. It has small raised commutator bars and am wondering if the brushes will wear off ... thanks for the upload.
Hi Mark thank you very much for getting back to me Finally someone who actually knows what he's doing any chance to hook up on Facebook. I would have some questions and some ideas I would like to share with you I checked out that machine you recommended I didn't even know that this is existing so I learnt a lot from you and I would like to continue. thank you very much. My what's app in +447950 542472
@@themaestroofrandom Mark is correct, there are three different resistance tests that can be carried out on the armature. Loads of good videos on youtube will show you the correct procedure. Good luck.
Thank you I feel 1 step closer to understanding the sparking motor I have. Also it helped that it was a bad motor all the other videos worked after cleaning up and parts changed. You told me what a burnt up motor looks like and why it's no good. Thank you very much.
Great video. & Sir I most definitely agree with the comments about the "Mayor" 😆! IDK what state your in, but I tell you one thing.. in 2023 I think all sides from far left to the far right & even the "extreme middle" can all agree on these politicians being out of touch with reality! But from a Man of the working class while maintaining a family & a stubborn truck.. I appreciate this video my brother from another mother! 🤝 P. S I also agree with one of the comments down below.. being "if your in buzzer mode u will get those beeps & to check for resistance near the OHM as well high amps when it runs. But if possible try using a 6V AC! Defeat the issue & never let these things beat you! I hope the comment section *(as I'm sure this man fixed his issue 2 years ago lol)* as well as the video helps everyone with this problem F. Y. Pretty much dropping this comment altogether to support your channel & the algorithm. Best of luck & God bless you AND everyone who reads this, on ALL of future endeavors 💯 ✌️
@@gwrong86 depends on the amount of damage... I generally use 400 grit, then finish it with 800-1200 so it’s super smooth. Always blow it off and clean between the commutator bars to remove any conducive debris, which will cause sparking or a short between the adjacent bars...
You need to put your armature on a lathe and machine the commutator. You will never get rid of the sparking this way (by looking at your brushes), you probably ruined your armature now unless you try and machine it to get rid of the file gouges. Do not do this people you will ruin your armature . You armature is probably fine , your commutator just needs to be machined / polished even. If anything try putting new brushes in. won't completely solve your problem but will probably get you through a job.
I have the same problem with anglegrinder I just bought in a pawnshop. Why does it eat so many brushes, why is it so hungry? I just read somewhere that man 3 reasons are 1. Inadequate Spring 2. Pressure, Poor Commutator or Ring Condition or 3. Brush Holders are Unequally Spaced or Out-of-Neutral. I guess now I have to disassemble it and try to eliminate these possible faults.
Thank you very much for sharing this information because I have three items with exactly the same problem and I am getting absolutely bananas. I really would appreciate if you would share how you getting on. I'm completely frustrated and I cannot find a solution
@@jeffgriffiths5945 changing bearing could solve problem have experience it? I have same sparking issue with my drill Machine i had clean armature , change brush and finally change field core but problem not solve it's sparking continue.... And heating without load in Just 30 secondly continue full speed Changing bearing will solve problem?
Such technique maybe good but most of thebtime when burning brush with high ligh often times the amature is grounded and shorted. I have done many times in my own power tools, replacing the amateur is still the ultimate solution if testing the stator is good
Using this method is bad. You are putting scratches in the copper connections which needs to smooth for the brushes to make greater contact to operate properly. It will also wear the brushes unevenly. You can remove the dark markings from the copper where the brush makes contact simply using a eraser from a pencil.
@@themaestroofrandom It’s best to use sand paper, coarseness depends on the amount of damage... I generally use 400 grit, then finish it with 800-1200 so it’s super smooth. Always blow it off and clean between the commutator bars to remove any conducive debris, which will cause sparking or a short between the adjacent bars... Also, it wasn’t a bad motor, you simply didn’t check the omh resistance properly... The original poster was referring to carbon being able to be removed with an eraser, ur caddy reply was unnecessary.
Try take the Armature out and test it with multimeter for continuity and you will be able to see where the spark is and then you can fix. Sometimes the wires melted where they connect to the copper commutator bars..
@@themaestroofrandom there is a pause function on most phone cameras. make videos as concise as possible this is a video that should be two 5 second clips
this means next time before you go through the whole profess of setting up your armature and clean it, you would be checking if there are short or other wise open circuit anywhere first. Right? :-)
you could also use a wire brush head on the end of a drill that spins great for taking rust off very small one else if its fanning out to far wrap it in duct tape to pull the brushes inwards for more controlled direction.
Minute 08:10 . . . don't blow up with your breath, unless you wear goggles, otherwise some copper or carbon particles can get your eyes . . . or, as a minimum protection when not wearing goggles, close your eyes when blowing . . . for your safety . . . Good job in any case, i have a couple of rotors to treat as you explain in your video . . . thank you very much ! Best regards. Alessandro ( Italy )
Should have checked functionality before doing any work on armature. Also when using file, you should have it set to cut against the rotation of armature (files are made to cut when pushed away from handle} and use a machinist file (about 1 inch wide) to help make armature flat and even. It was a good idea start with though.
So thanks for the comments. I saw it and was curious why is he using a file on something that looks delicate and has tight separation yet he is introducing copper dust and particles into the spaces. LOL
Not only is the commutator scored, but you are using horrible brushes, if you search, how to wear in carbon brushes, the first result shows what brushes are good or bad
@@themaestroofrandom it's not short, just low resistance. Motor windings has very low resistance, just measure resistance (not continuity test) and if it's around 1 ohm everything ok.
@@themaestroofrandom Yes, check to see if you have a short between the motor itself and the housing. Most common is a missing non-conductive (plastic, felt or otherwise) bushing between the motor and housing. GG. Hope that helps. :)
@@themaestroofrandom Sparking is what is eating the brushes, as well as leaving the burnt remains. As for what is causing the sparking, I don't know. But I guess could be wrong brush material. I do have a bosch motor sparking with worn original brush currently. The bosch brush is expensive could be because it has two type of materials on it: the non-sparking bit and the the sparking bit to warn of wear. The cheap brushes could be made entirely from the material intended for wear warning. I just made this stuff up and this seems like a plausible engineering design. I would design it this way if I was doing it. The cheap brushes are probably made by the chinese who have no idea what they are doing.
You cannot measure armature resistance and get a sensible reading with that type of meter, it will look like a short circuit because the resistanc is very low. Also, if there is a shorted turn on one of the windings, that will not be detectable either. There is a way to test this - use 6v A.C. and measure the current of each winding pair by connecting across opposite copper strips on the commutator, a similar level of current should be observed with each measurement. A shorted turn will show as higher current or an open circuit will show zero current. As well as cleaning the commutator, each gap between copper strips should be cleared of debris as well. Ensure that there is no connection between the commutator and the armature body. Hope this helps.
I like this response but I think you should put a video link to demonstrate how to test the commutator properly.
Hello, is there any page or video that explains this in a little more detail? I mean the 6v ac test.
@@yasirwazir567 I will try and make a diagram with a description of how to do the test. It may take some time to do this so please be patient.
@@apmdavies Thank you
@@apmdaviesdid you get around to it ?
Generally handy men is good with idea of tune-up.
Just few recomendations from my experience. Never ever use files for commutators at home. Just sand paper different grit 100, 200, 400.
Turning by power drill good but must be at higher rpm.
Carbon residues from the grooves could be cleaned with utility knife. Also woud be better to blow off all armature from dust with compressed air, if possible.
hi handsome. you me laugh. thanks. I have a 2014 kobalt km210 electric lawn mower, and this is exactly what I need to do to mine. I found it on the side of the road,free. I removed the cover and the carbon was full of metal debris, so I used a wire brush and got the spring to retract and the carbon has 80% left , one side chiped off as I was cleaning it. I examined the copper and it needs cleaning, I thought and said to myself, I know who can teach me , someone from India. I searched for carbon brushes and here you are. I'm happy your here . thank you.
Its not shorting, the beeping is a good thing, its showing there is no dead bars on the commutator. The best thing to do is to check resistance and have it checked on a growler tester.
i think it's not shorted, it beeps normally if your in buzzer mode. you must check for resistance value near to an ohm. you might as well check if it is high amps when it runs,refer to the output specs of the unit.
I thought so too. If one or two of the commutator bars beeps yes, but not all perhaps an analog meter would be ideal I guess. This video helped me a lot as my sander carbon brushes broke inside and damaged the commutator. It has small raised commutator bars and am wondering if the brushes will wear off ... thanks for the upload.
The armature isn't shorted. It is supposed to show a resistance reading. Use an armature growler to test it properly.
Hi Mark thank you very much for getting back to me Finally someone who actually knows what he's doing any chance to hook up on Facebook. I would have some questions and some ideas I would like to share with you I checked out that machine you recommended I didn't even know that this is existing so I learnt a lot from you and I would like to continue. thank you very much. My what's app in +447950 542472
@@themaestroofrandom Mark is correct, there are three different resistance tests that can be carried out on the armature. Loads of good videos on youtube will show you the correct procedure. Good luck.
Thank you I feel 1 step closer to understanding the sparking motor I have. Also it helped that it was a bad motor all the other videos worked after cleaning up and parts changed. You told me what a burnt up motor looks like and why it's no good. Thank you very much.
You are more than welcome I'm glad that the video was somewhat useful for you
Great video. & Sir I most definitely agree with the comments about the "Mayor" 😆! IDK what state your in, but I tell you one thing.. in 2023 I think all sides from far left to the far right & even the "extreme middle" can all agree on these politicians being out of touch with reality! But from a Man of the working class while maintaining a family & a stubborn truck.. I appreciate this video my brother from another mother! 🤝
P. S I also agree with one of the comments down below.. being "if your in buzzer mode u will get those beeps & to check for resistance near the OHM as well high amps when it runs. But if possible try using a 6V AC!
Defeat the issue & never let these things beat you! I hope the comment section *(as I'm sure this man fixed his issue 2 years ago lol)* as well as the video helps everyone with this problem
F. Y. Pretty much dropping this comment altogether to support your channel & the algorithm. Best of luck & God bless you AND everyone who reads this, on ALL of future endeavors 💯 ✌️
Use sandpaper you will have a better results.
Best regards and thank you for your Video.
Lycan Lycans What grain sand paper?
@@gwrong86 depends on the amount of damage... I generally use 400 grit, then finish it with 800-1200 so it’s super smooth. Always blow it off and clean between the commutator bars to remove any conducive debris, which will cause sparking or a short between the adjacent bars...
Inspiring video, thank you. I agree with the comments though I would never use a file because it would take up too much material. Thanks for sharing
Simple easy video. Your comment “I am officially pissed off“ was hilarious.
Thars my man
"my disappointment is immeasurable and my day is ruined" lol
He is trying to say that he also has unofficial pissed off 😁
I'm pretty sure the mica between the comuntator is packed full of copper shavings from you file work causing the short
You need to put your armature on a lathe and machine the commutator. You will never get rid of the sparking this way (by looking at your brushes), you probably ruined your armature now unless you try and machine it to get rid of the file gouges. Do not do this people you will ruin your armature . You armature is probably fine , your commutator just needs to be machined / polished even. If anything try putting new brushes in. won't completely solve your problem but will probably get you through a job.
I have the same problem with anglegrinder I just bought in a pawnshop. Why does it eat so many brushes, why is it so hungry? I just read somewhere that man 3 reasons are 1. Inadequate Spring 2. Pressure, Poor Commutator or Ring Condition or 3. Brush Holders are Unequally Spaced or Out-of-Neutral. I guess now I have to disassemble it and try to eliminate these possible faults.
Thank you very much for sharing this information because I have three items with exactly the same problem and I am getting absolutely bananas. I really would appreciate if you would share how you getting on. I'm completely frustrated and I cannot find a solution
4. bad bearings
5) burned winding too.
@@jeffgriffiths5945 changing bearing could solve problem have experience it?
I have same sparking issue with my drill Machine i had clean armature , change brush and finally change field core but problem not solve it's sparking continue.... And heating without load in Just 30 secondly continue full speed
Changing bearing will solve problem?
Such technique maybe good but most of thebtime when burning brush with high ligh often times the amature is grounded and shorted. I have done many times in my own power tools, replacing the amateur is still the ultimate solution if testing the stator is good
Using this method is bad.
You are putting scratches in the copper connections which needs to smooth for the brushes to make greater contact to operate properly. It will also wear the brushes unevenly. You can remove the dark markings from the copper where the brush makes contact simply using a eraser from a pencil.
Sorry but I didn't know that rubber can erase copper scratches
@@themaestroofrandom It’s best to use sand paper, coarseness depends on the amount of damage... I generally use 400 grit, then finish it with 800-1200 so it’s super smooth. Always blow it off and clean between the commutator bars to remove any conducive debris, which will cause sparking or a short between the adjacent bars...
Also, it wasn’t a bad motor, you simply didn’t check the omh resistance properly...
The original poster was referring to carbon being able to be removed with an eraser, ur caddy reply was unnecessary.
Total greșit! Toleranta între cota de rulment și colector trebuie sa fie sub 0, 05mm
hi handsome this end result is beautiful. what cream do you recommend applying?
Nice info, thanks
Good morning sir why still sparkling im already sandpaper and changed the carbor
I have same problem bro
Try take the Armature out and test it with multimeter for continuity and you will be able to see where the spark is and then you can fix. Sometimes the wires melted where they connect to the copper commutator bars..
dont you have sandpaper?
Can I use sandpaper if a file is not available?
I was very entertained ..Thank you for vid..
Thank you very much that is the whole purpose of the video
Oh ok there ya go. Nice and btw I like that you told us about the mayor! Just like the United States man spot on when it comes to over here lol
"The mayor is driving around in a good car - but let's not talk about politics" - love it!
Thaks for watching really appreciate it
@@themaestroofrandom
Why don't you edit your video and cut the unnecessary...
@@sanjaydahiwale1016 why don't you do it for me and show me what you can do. If you are good I will employ you
@@themaestroofrandom there is a pause function on most phone cameras. make videos as concise as possible this is a video that should be two 5 second clips
this means next time before you go through the whole profess of setting up your armature and clean it, you would be checking if there are short or other wise open circuit anywhere first. Right? :-)
I like your style and I don't disagree with your recycling view.
you could also use a wire brush head on the end of a drill that spins great for taking rust off very small one else if its fanning out to far wrap it in duct tape to pull the brushes inwards for more controlled direction.
Sanding paper is better i think
You are rotating the armature the wrong way. Your file is made to cut in a way that you need to reverse your direction.
I might be wrong but your file seems to be the wrong way round
Plz grinder me karbin jaldi se Chala jata h kya krna h kese sad krna h
Sir gender me karbin jaldi jaldi kyo ghas jata h khatam ho jata h end plz btaye
Thank you for making this video.
Minute 08:10 . . . don't blow up with your breath, unless you wear goggles, otherwise some copper or carbon particles can get your eyes . . . or, as a minimum protection when not wearing goggles, close your eyes when blowing . . . for your safety . . .
Good job in any case, i have a couple of rotors to treat as you explain in your video . . . thank you very much !
Best regards.
Alessandro ( Italy )
Let me know how you getting on
is copper bad to get in ones eyes?
@@snorttroll4379 🤣🤣🤣 only in that one that still can see, the other eye ( blind ) generally doesn't care ... 🤣🤣🤣
Where can we order a new armature
Your meter will beep on a healthy motor.... 🙄
Thanks
Can I use sand paper?
Main kam motor carbon plate kaise dalna chahie
This is wrong in many ways using file stripping to much metal from the rotor surface just use 1000 grit sand paper and you will get perfect results
Awesome vid it thank you !
NEVER use wood sand-paper, or metal (silicon carbide) papers on the commutator. Metal dust particles are a safety hazard.
You're wrong. You just need to use non metallic sand paper.
@@FikshunMoshun how does one tell? there is silicon carbide and there is the other kind. I forget it s name
Still thanks for the shearing
Also make sure you don't put too much pressure on it because you might cause those to combine which would defeat the purpose of the repair.
Why not just use a Brillow pad or sandpaper a file will take too much off and you can’t test it that way
My drill machine also sparks a lot
Christmas is coming soon
Should have checked functionality before doing any work on armature. Also when using file, you should have it set to cut against the rotation of armature (files are made to cut when pushed away from handle} and use a machinist file (about 1 inch wide) to help make armature flat and even. It was a good idea start with though.
use a soap stone to clean commutator, or some very fine emery paper. file is just fucking it up more
HA HA TRUE.
I WILL SEND SOAPSTONE FROM KENYA OK
Try filing that chip and around it
So thanks for the comments. I saw it and was curious why is he using a file on something that looks delicate and has tight separation yet he is introducing copper dust and particles into the spaces. LOL
i sware that i sleep when you was sanding the coper.
Good job
Always
Rewind it
"We" weren't talking politics, you were 😝
good job!
You could have put that whole situation and it just two little lines I watched it and did not learn nothing
It's like school you learnt many things but only a few things are useful
I guess you're getting bananas ...
Sir, pl. reply me what happened if Capacitor of angle grinder 0.22 mfd disconnected?
Angle grinder dont use capacitor
Emery paper would be best. 320 grit.
Not only is the commutator scored, but you are using horrible brushes, if you search, how to wear in carbon brushes, the first result shows what brushes are good or bad
I have same GRADO
put it back in the damn saw and TRY IT JESUS
I appreciate your support but do not call me Jesus just call me "your master"
Omong opo weki boss Ra dong q
Keep up good and u r funny
You Win Sometimes ☺️
And Lose Sometimes 🥵
This time I will do it manually with the help of Woodglut designs.
Ivon név a szemcsepp
Partactwo
Parfait
🤦🏻♂️ omg! You create scratches, thinner and scratches on the surface of the commutator armatures!
Just call me Master oh my God is too much
I prefer to build with Woodglut plans.
Lol
Is not short
So what is it??
@@themaestroofrandom it's not short, just low resistance. Motor windings has very low resistance, just measure resistance (not continuity test) and if it's around 1 ohm everything ok.
@@ClrvGamer ok but could you explain why is eating off the brushes immediately and Sparks Like crazy if I replace with new brushes
@@themaestroofrandom Yes, check to see if you have a short between the motor itself and the housing. Most common is a missing non-conductive (plastic, felt or otherwise) bushing between the motor and housing. GG. Hope that helps. :)
@@themaestroofrandom Sparking is what is eating the brushes, as well as leaving the burnt remains. As for what is causing the sparking, I don't know. But I guess could be wrong brush material. I do have a bosch motor sparking with worn original brush currently. The bosch brush is expensive could be because it has two type of materials on it: the non-sparking bit and the the sparking bit to warn of wear. The cheap brushes could be made entirely from the material intended for wear warning. I just made this stuff up and this seems like a plausible engineering design. I would design it this way if I was doing it. The cheap brushes are probably made by the chinese who have no idea what they are doing.
You don't know what you are doing!!
Are you available? If so, your place is on eaplo. Subscribe to eaplo.com and change your life forever!
Thanks