2:14 commutator is black because fine debris is sucked into the motor when it is cutting things. The electric current burns this debris into a hard shiny lacquer on the commutator and the brushes. 2:35 wire holds gearbox shut, keeps grease inside while cleaning commutator 2:50 use very fine grit emery cloth to remove black gunk from commutator. it is for the best if your fine grit emery cloth loads up immediately and you need to use a lot of it. Emery cloth is easy to replace but the commutator is not. You want to minimally strip away copper because you probably can't rebuild this kind of commutator when it wears down. Probably a crimped and stamped assembly with non-replaceable commutator segments. 3:16 fine pointy tool is used to scrape between commutator segments. It's essentially the same descaling tool dentists use to clean your teeth. The burned debris removed by the emery cloth also wedges down between segments and can electrically short them out, reducing motor torque. Don't dig too hard or deep because there's usually either plastic or mica insulating the segments. 5:30 using a steel blade to bevel and deburr edges of copper segments so that the brush doesn't dig into the slot between segments. (Though I've not seen much discussion of copper segment edge beveling/deburring in engineering textbooks, so unknown if this practice is advisable if not already present in the original design.) 6:30 scraping the shiny burned debris off of the face of the carbon brushes. (Though note, brushes cleaned this way are flattened and are now smooth on the face, but the commutator surface is curved. When reassembled, initially only the center part of the carbon brush makes contact with the curved commutator. Current flow is reduced and the motor will initially have reduced torque. The motor needs to spin for a while to wear the carbon brush face back to a curved profile that fully contacts the curved commutator segments. If you can get new brushes from the manufacturer that are preshaped at the factory to be curved to fit the commutator [and you install them properly oriented] then you can have full current and maximum torque straight out of the package.) 11:08 Try to avoid having the cat get its tail caught in your power tools.
Hey, i accidently used 150 grit sandpaper (not too much just a couple of rounds). Though i did saw copper flakes coming off. I know i shouldn’t have done it. Now can i redo it again with a super fine (600 grit paper) to smooth it out? It gives screeching sound from the time i changed the carbon brushes (before sanding the commutator, thus i used the sandpaper but i didn’t use a finer grade initally). Any help would be appreciated.
nice! I just got into rebuilding a starter. Although I used a wire brush to buff the commutator I did not use a pick on the lines between the contacts. Will do that now before final assembly. I used to rebuild starters and used a broken hacksaw blade between the contacts. The starter I'm working on has spaces to small for a hacksaw blade but a pick will do. Thanks
...based on my observation. Bearings: front and back side are misaligned causing wiggled in the armature assembly with spark between cummutator and brushes that damaged both.
Is it important what sandpaper to use? What grid did you use for comutator and what for brushes? I replace brushes in hair clipper but it's very loud since.
I used the same sandpaper for the commutator and for the carbon brush, i just sandpaper the edges of the commutator so it will touch the carbon brush nicely when its spinning...
I have a 7in Diamondback wet saw that recently stopped working. I fixed it once before by cleaning the armature but tried again to do the same.. nothing. Probably fried right?
@ commutator is black because fine debris is sucked into the motor when it is cutting things. The electric current burns this debris into a hard shiny lacquer on the commutator and the brushes. @ wire holds gearbox shut, keeps grease inside while cleaning commutator @ use very fine grit emery cloth to remove black gunk from commutator. it is for the best if your fine grit emery cloth loads up immediately and you need to us
You need to check the continuity of the windings first. If there still continuity check if it is not short circuit to the rotor.. If it is not shorted to the rotor it still work just use heavy duty epoxy
Great video-thanks! I have an old B&D bench grinder that suddenly stopped while I was using it...hard! It got pretty hot. Now it just buzzes. When off spins freely but turning it on magnetized it and locks it in place. Any ideas? Brushes? Thank you.
Malakas po ba ang vibration nya pero hindi nag e sparks ng malakas sa may carbon brush nya na parts? Pag malakas po ang vibration need po nya ng maintenance.. Maaring kailangan ng higpitan ang mga screw, kailangan palitan ng bearings at need lagyan ng grease ang sa may gear nya na parts.. Kung mabubuksan nyo naman po ang cut saw nyo. Tignan nyo po ang armature kung wala bang tama or gasgas kasi pag may gasgas ay lumalapat ito sa bakal ng stator kaya madaling umiinit ang tools.. Need lang po nyan ng maintenance.. Sana po nakatulong ako sir. Maraming salamat po. Godbless you po
Don't over sanding the copper and scrape, doing this is the last option and clean properly because the debris will spark and its more dangerous or on the other hand change the part. Use exact carbon sometime its wiggle if not match or the spring is more tension to push the carbon. Normal sa may carbon brush na mag spark hindi tulad ng brushless walang spark..
Sir vlog mo nmn sunod kng paano ikabit ang stator ng drill sa carbon brush..yung parang spring na sinasabit sa ilalim.kc pinasabit ko lng dto sa nag gagawa siningil ako 250.cncya na sir baguhan lng
Salamat sa idea boss. Gagawa ako ng video kung paano e kabit ang carbon brush boss. Maraming salamat po boss. Ano pong powertools ang pinalitan nyo ng carbon brush boss?
May nabili po akong armature sa online sir.. Pero subrang mahal kaya sa may junkshop nalang ako nag hahanap ng mga powertools na pweding pagkukunan ng parts. Pero if gusto mo bumili ng armature sir. Nasa facebook po.. Search nyo lang po powertools Philippines.. Salamat po sir. Godbless you sir..
Sir, may bagong bili po akong Mailtank circular saw. Upon testing, anlakas po ng spark at amoy sunog agad. Wala naman pong usok pero everytime na ipepress ang trigger, malakas ang spark at amoy. Normal po kaya yun dahil bago pa ang brushes nya? Thank you and more informative videos pa po.
Hmnn.. Sir normal lang po na mag spark ito pero dapat hindi masyadong malakas kasi pag malakas na talaga. Ibig sabihin may short circuit po ito or may natanggalan ng insolation ang winding ng armature. Please check nyo po ang carbon brush sir. If madaling napupudpud po ang carbon brush ay ibig sabihin na hindi po good condition ang powertools nyo sir.. Check nyo po ang armature at ang stator sir if may short circuit or gasgas tapos ipaglayo nyo ang nagka short circuit at lagyan nyo ng insolation varnish..
Goodmorning po sir.. Hindi po sila magkapareho ng sukat sir at laki kasi kadalasan mas malaki ang armature ng circular saw kaysa sa angle grinder. Mas malakas din po ang rpm ng circular. Ano po ang power tools na need nyo po ayusin ang armature sir?
Taga Iligan city po ako sir. Ano pong brand ng powertools nyo sir baka magawa ko po yang sunog na armature nyo pwede ko po yang ma rewind or may mga extra pa akong mga powertools dito. Saan po sa inyo sir?
Tried three time in a row to replicate your guide carefully on a burned vacuum cleaner motor. No luck. The sparks and smell are still there. Can't see any other problem. Probably this motor is really burned out.
If the brushes are in good condition and the commutator is not shorted and clean, the sparks can be caused by a faulty filter capacitor or a shorted coil.
Boss. Nilinisan nyo ba ang part na sa may commutator na doon palaging nagkaka short circuit? Boss pwede nyo pa pong lihain at hanapin yung copper wire na malapit sa commutator na parang na sunog. Yun po ang nag ka short circuit tapos linisan nyo at ipag hiwalay ang wire na nagkadikit na walang insolation, tapos lagyan nyo po ng insolation varnish. Dalawang beses nyo po applyan ng insolation varnish boss para mas ma cover ito.
2:14 commutator is black because fine debris is sucked into the motor when it is cutting things. The electric current burns this debris into a hard shiny lacquer on the commutator and the brushes.
2:35 wire holds gearbox shut, keeps grease inside while cleaning commutator
2:50 use very fine grit emery cloth to remove black gunk from commutator. it is for the best if your fine grit emery cloth loads up immediately and you need to use a lot of it. Emery cloth is easy to replace but the commutator is not. You want to minimally strip away copper because you probably can't rebuild this kind of commutator when it wears down. Probably a crimped and stamped assembly with non-replaceable commutator segments.
3:16 fine pointy tool is used to scrape between commutator segments. It's essentially the same descaling tool dentists use to clean your teeth. The burned debris removed by the emery cloth also wedges down between segments and can electrically short them out, reducing motor torque. Don't dig too hard or deep because there's usually either plastic or mica insulating the segments.
5:30 using a steel blade to bevel and deburr edges of copper segments so that the brush doesn't dig into the slot between segments. (Though I've not seen much discussion of copper segment edge beveling/deburring in engineering textbooks, so unknown if this practice is advisable if not already present in the original design.)
6:30 scraping the shiny burned debris off of the face of the carbon brushes. (Though note, brushes cleaned this way are flattened and are now smooth on the face, but the commutator surface is curved. When reassembled, initially only the center part of the carbon brush makes contact with the curved commutator. Current flow is reduced and the motor will initially have reduced torque. The motor needs to spin for a while to wear the carbon brush face back to a curved profile that fully contacts the curved commutator segments. If you can get new brushes from the manufacturer that are preshaped at the factory to be curved to fit the commutator [and you install them properly oriented] then you can have full current and maximum torque straight out of the package.)
11:08 Try to avoid having the cat get its tail caught in your power tools.
Wow
I wouldn’t advise anyone to go and clean their motor like this.
@@BadRonald1 What would you advise then?
Hey, i accidently used 150 grit sandpaper (not too much just a couple of rounds). Though i did saw copper flakes coming off. I know i shouldn’t have done it. Now can i redo it again with a super fine (600 grit paper) to smooth it out?
It gives screeching sound from the time i changed the carbon brushes (before sanding the commutator, thus i used the sandpaper but i didn’t use a finer grade initally).
Any help would be appreciated.
nice! I just got into rebuilding a starter. Although I used a wire brush to buff the commutator I did not use a pick on the lines between the contacts. Will do that now before final assembly. I used to rebuild starters and used a broken hacksaw blade between the contacts. The starter I'm working on has spaces to small for a hacksaw blade but a pick will do. Thanks
I don't have this kind of tool on hand yet it would be helpful to me the way how it is being repaired if I encounter the same issue in the future.
thank you very much for this video i have the same problem. thumbs up .
Good job, sometimes you can do it from outside, just take old cutting dics, brake it and polish place where you have spark
Oh real.. cause iamntired of hoover
Thank you very much sir ji. plan for success.
...based on my observation. Bearings: front and back side are misaligned causing wiggled in the armature assembly with spark between cummutator and brushes that damaged both.
show de bola ficou top
hello sir. i don't understand how to find the start or first winding on the any armature commutator. Please help
My angle grinder has that very problem. When inspected, the copper part where brushes make contact is worn, Can it be filled? And how? Please help.
Thanks to the good idea I have learned from you
Good job. Only it needed new brushes, the old one we're almost out.
Is it important what sandpaper to use? What grid did you use for comutator and what for brushes? I replace brushes in hair clipper but it's very loud since.
I used the same sandpaper for the commutator and for the carbon brush, i just sandpaper the edges of the commutator so it will touch the carbon brush nicely when its spinning...
@@creativejunior7060 Good
God job
I was looking for a tutoring of repairing a smoking electric mini saw. I like Kevin MacLeod music. What is the name of it.
Great vid. At the start was there a burning smell as well as sparks? That’s the way mine is even after changing the brushes.
Thank you so much sir
Mechanical engg students should watch this type of useful videos.
Thank you so much sir..
Please support and subscribe my youtube channel..
God bless you sir.
@@creativejunior7060 ok. Brother...🙏
the sparking is caused by abuse, overloading/dirty air,,, very important to cut out between overheated shorting commutator bars
sir. no po problem ng circular ng sparck
Very useful informative video Tq
Thank you so much sir.
What kind of powertools that you want to repair?
@@creativejunior7060 sir i want repair my blender please it sparks a lot during working from the inside
Hi I have the same problem whit a Sáez all can I do the same job ??
I tried sanding the commutator and brush, and cleaning between bars but my new saw still sparking. Any suggestions.
Did you solve this problem? I'm also dealing with the same issue.
Great job 👌👌
Thank you so much sir
Mere drill machine me maine yeh sab kiya carbon brush bi change kiya, field core also change, after that it's continue sparking....
Now what to do?
I have a 7in Diamondback wet saw that recently stopped working. I fixed it once before by cleaning the armature but tried again to do the same.. nothing. Probably fried right?
Cleaning doesn't work.
@ commutator is black because fine debris is sucked into the motor when it is cutting things. The electric current burns this debris into a hard shiny lacquer on the commutator and the brushes.
@ wire holds gearbox shut, keeps grease inside while cleaning commutator
@ use very fine grit emery cloth to remove black gunk from commutator. it is for the best if your fine grit emery cloth loads up immediately and you need to us
Yes your right sir..
Commutator is black because of some debris and because of the carbon brush..
I use insulation varnish after i clean the armature.
If a copper bar or 2 is damaged (melted) will it still work?
You need to check the continuity of the windings first. If there still continuity check if it is not short circuit to the rotor.. If it is not shorted to the rotor it still work just use heavy duty epoxy
Great video-thanks! I have an old B&D bench grinder that suddenly stopped while I was using it...hard! It got pretty hot. Now it just buzzes. When off spins freely but turning it on magnetized it and locks it in place. Any ideas? Brushes? Thank you.
Burnt armature windings.
Jeśli będzie uszkodzony konwerter to żadne czyszczenie nie pomoże i tak będzie przebicie a w tedy nie pomoże woda z Wisły jak jaja obwisły.
Hi Brother. Can you show me how to fix spark and smoke from my drilling machine
Good idea🎉🎉🎉
I replaced rotor berings brushes and still have big spark. Why?
Perfect work
Thank you so much...
On my next video. I will repair my very old electric drill
Good job
Thank you
👍
That will work temporarily.
Yeah, you're right because on this video I'm using epoxy.. I need to upgrade it. I need a much stronger epoxy or. Adhesive
Very slow but good
WOW - I got sparks coming out of my petrol weed wacker.
Hello from iraq my motor similar
Gud day sir ask k lmg bakit malakas un vibration nga cut saw ko anu kaya posibling sira
Malakas po ba ang vibration nya pero hindi nag e sparks ng malakas sa may carbon brush nya na parts? Pag malakas po ang vibration need po nya ng maintenance.. Maaring kailangan ng higpitan ang mga screw, kailangan palitan ng bearings at need lagyan ng grease ang sa may gear nya na parts..
Kung mabubuksan nyo naman po ang cut saw nyo. Tignan nyo po ang armature kung wala bang tama or gasgas kasi pag may gasgas ay lumalapat ito sa bakal ng stator kaya madaling umiinit ang tools..
Need lang po nyan ng maintenance.. Sana po nakatulong ako sir. Maraming salamat po. Godbless you po
so we need to change the brushes and clean it
I put insolation varnish after i clean the armature sir..
Thank you so much sir.
God bless you.
@@creativejunior7060 :D
Nabasa Po Ang cut off machine namin at pinaandar pos tumigil may paraan Po bang maayos
❤
Sir tnong klang xe ngspark yong jigsaw ko khit nasanpaper kn at bgo yong carbon gya ng ginagawa sa video
Don't over sanding the copper and scrape, doing this is the last option and clean properly because the debris will spark and its more dangerous or on the other hand change the part. Use exact carbon sometime its wiggle if not match or the spring is more tension to push the carbon. Normal sa may carbon brush na mag spark hindi tulad ng brushless walang spark..
Sir mgkaiba ang armature ng cercular saw at grinder xe blak knang palitan ng bgo
Can't work out on how many times he cleaned the armature, sanded ,scrapped and cleaned again, sorry have to go to bed now got tired of the same thing
Where is dealer and supplier of DeWalt machine in Uganda
What kind of dewalt powertools do you wanna repair? You can order online..
Ok felicitar
Thank you..
Unplug it before working on it
Thank you so much..
Goood
What kind of powertools you like? Thank you so much.
Sir vlog mo nmn sunod kng paano ikabit ang stator ng drill sa carbon brush..yung parang spring na sinasabit sa ilalim.kc pinasabit ko lng dto sa nag gagawa siningil ako 250.cncya na sir baguhan lng
Salamat sa idea boss.
Gagawa ako ng video kung paano e kabit ang carbon brush boss.
Maraming salamat po boss.
Ano pong powertools ang pinalitan nyo ng carbon brush boss?
Grider pla yun boss..stator nya yung sinasabit sa ilalim ng carbon brush...dca gri der ko boss..
Ok
Shoot mine is throwing sparks out
Boss saan po makakabili ng armature
May nabili po akong armature sa online sir.. Pero subrang mahal kaya sa may junkshop nalang ako nag hahanap ng mga powertools na pweding pagkukunan ng parts. Pero if gusto mo bumili ng armature sir. Nasa facebook po..
Search nyo lang po powertools Philippines..
Salamat po sir. Godbless you sir..
like 2000 ads how is it possible
Sir, may bagong bili po akong Mailtank circular saw. Upon testing, anlakas po ng spark at amoy sunog agad. Wala naman pong usok pero everytime na ipepress ang trigger, malakas ang spark at amoy. Normal po kaya yun dahil bago pa ang brushes nya? Thank you and more informative videos pa po.
Hmnn..
Sir normal lang po na mag spark ito pero dapat hindi masyadong malakas kasi pag malakas na talaga. Ibig sabihin may short circuit po ito or may natanggalan ng insolation ang winding ng armature.
Please check nyo po ang carbon brush sir.
If madaling napupudpud po ang carbon brush ay ibig sabihin na hindi po good condition ang powertools nyo sir..
Check nyo po ang armature at ang stator sir if may short circuit or gasgas tapos ipaglayo nyo ang nagka short circuit at lagyan nyo ng insolation varnish..
Creative junior, ganito din yung cut off machine ko,.,.,after malinisan saan po dun qng lalagyan ng varnish?
The cluster and n
Thank you so much for watching my video..
I will make more videos like this..
God bless you sir..
PLEASE HELP ME SAND PAPER GRID HOW MUCH THANKS?
Whats the problem of your powertooks sir? I just use an ordinary sandpaper..
I think its 400 and 1000
@@creativejunior7060 Thanks a lot bro👍👍👍
Thank you bro.. What power tools do you want to repair?
@@creativejunior7060 i just watch your video but i try to fix Spark at my (Angle grinder) but still have spark and burn smells 😥
Ganyan din boss circular ko lakas din mag spark ganun din ba sira nun. Salamat
Yung sa akin boss. Nilinisan ko at inayos ko ang sa may lalagyanan ng carbon brush at humina naman ang spark nya.
Sir tnong klang pareho ba ang armature ng cercular at grinder
Goodmorning po sir..
Hindi po sila magkapareho ng sukat sir at laki kasi kadalasan mas malaki ang armature ng circular saw kaysa sa angle grinder. Mas malakas din po ang rpm ng circular. Ano po ang power tools na need nyo po ayusin ang armature sir?
Rhoybi xe pangalan cercular saw ko malakas mgspark kya hindi ko ginagamit kya tinatanong ko pareho lng armature khit no brand ng cercular saw
Taga saan ka sir? Nagagawa din ba nasunog na armature?
Taga Iligan city po ako sir.
Ano pong brand ng powertools nyo sir baka magawa ko po yang sunog na armature nyo pwede ko po yang ma rewind or may mga extra pa akong mga powertools dito. Saan po sa inyo sir?
Dewalt po sir eh, san ko kayo pwede mamessage? Para mapakita ko sa inyo picture.
That's not good....better to repkace armature..
In UK, new armature is almost as much as new machine.
Good morning sir kpg midyo malakas ang spark dilikadoba
Pagmalakas po ang spark sir ay napakadilikado po talaga. Maari po itong maka koryente or maging sanhi ng tuluyang pagka sira ng powertools.
Salamat sana hwg kyong mgsawa sumagot sa mga nmin bagohangudlock
Gin try ko....indi na Wala Ang spark nya
Tried three time in a row to replicate your guide carefully on a burned vacuum cleaner motor. No luck. The sparks and smell are still there. Can't see any other problem. Probably this motor is really burned out.
If the brushes are in good condition and the commutator is not shorted and clean, the sparks can be caused by a faulty filter capacitor or a shorted coil.
I’ve got a Milwaukee like this clean everything put new brushes in it same thing hate to throw away but running out of options
Boss ginaea ko na yan pero nag spark parin
Boss sana mapansin ang comment ko, ginawa ko na po yan boss
Boss.
Nilinisan nyo ba ang part na sa may commutator na doon palaging nagkaka short circuit? Boss pwede nyo pa pong lihain at hanapin yung copper wire na malapit sa commutator na parang na sunog. Yun po ang nag ka short circuit tapos linisan nyo at ipag hiwalay ang wire na nagkadikit na walang insolation, tapos lagyan nyo po ng insolation varnish. Dalawang beses nyo po applyan ng insolation varnish boss para mas ma cover ito.
Opo boss ilan ulit ko na po nilinis pero wala parin
Bought a table saw, commutator failed. Melted. Abusive owner I suppose.
I wouldn’t label this as repair. This is simply cleaning.
Please .... !!! The musicis unnecessary and gives the viewer a migraine
I'm so sorry sir. On my next video I will not put any background music sir.. Only the sounds of the tools that I'm using.. Thank you so much sir..
How to clean not repair
Thank you so much sir..
Godbless you
That temporary and worst method.
Didn't see any damage or any repair ------ just armature clean and buff .Pretty deceptive title
I repair and clean it sir..
I put some insolation varnish...
Thank you so much sir..
God bless you sir..
Are you a profesional technician???or you are only getting subsicriber so that you get money from you tube????do not do that men!!youre fire!!!
Anu tawag dun sa dalawa itim n may spring