Sparking carbon brushes ~ Cleaning the armatures commutator bar on a circular saw

[@apmdavies]

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.

[@davidlyons7238]

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.

[@pavlosiergiev5869]

Generally handy men is good with idea of tune-up.

[@go5582]

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.

[@MrILLUMINATING]

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

[@tdug3432]

Thank you for making this video.

[@lukeroberts13]

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.

[@lilsneak150]

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! 🤝

[@jonathanmcclure8346]

Awesome vid it thank you !

[@ethanjustinvillar6436]

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.

[@angelBacaling100]

good job!

[@gedhughes2787]

I was very entertained ..Thank you for vid..

[@Bianchi77]

Nice info, thanks

[@badaddidude]

The armature isn't shorted. It is supposed to show a resistance reading. Use an armature growler to test it properly.

[@lycanlycans7548]

Use sandpaper you will have a better results.

[@sylvesteradeniyi3280]

Can I use sandpaper if a file is not available?

[@dubmasterz3261]

Simple easy video. Your comment “I am officially pissed off“ was hilarious.

[@go5582]

hi handsome this end result is beautiful. what cream do you recommend applying?

[@northwestrockgem9745]

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

[@sunilmehra2614]

Plz grinder me karbin jaldi se Chala jata h kya krna h kese sad krna h