How To Repair A Dewalt Cutoff Saw That Throws Sparks Out Motor

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circular saw brushes sparking

Discussion in 'Hobby Electronics' started by [electronic mail protected], Aug 28, 2006.

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Hi there. I'm trying to fix a (Skill) circular saw . There are loud (&
vivid) sparks coming from the brushes (then noisey I can no longer use
it). I pulled out the brushes & at that place is lots of carbon so they are
both still skillful.
Any ideas of what the trouble could exist. Could it exist faulty supression
caps??
Nigh on sure there are 'shorts' in the armature windings. To test for
that requires a 'growler' which you will find at whatever reputable repair shop.
Hi there. I'thou trying to fix a (Skill) circular saw . In that location are loud (& Sounds like a stuffed armature. Beingness a skill, merely throw it away and purchase
another ane. Skill are the 'Bic' of power tools.
Unless you have an extreme build upwards of carbon dust etc in in that location (which
is very unlikely to do this) then you most likely take shorts in the
motor windings, which create these sparks from the large current being
drawn when the brushes pass over those sections..
If this is a regular paw held circular saw, I would consider tossing
information technology and buying a new i, as its unlikely to be feasible to have it
repaired, or motor re-wound. In my contempo experience, DeWalt make
excellent power tools (if you want to spend the $$)
If y'all was a handy man and wanted to try a set up yous could remove the armature
and use a hacksaw blade ground down on one end to a 'hook' and clean between
the armature contumely segments with this.
Not for the faint hearted, but could piece of work.

JD
Very much depends how much utilize it gets , I might use my circular twine a
yr , and then far the $38.00 on special GMC is going fine .
How many years for how many $$$$
They look to be a lot of money for something that turns upwards alongside all
the cheap chinese brands in all the local tool shops. where are they made?
Deceit say I've ever seen a brass commy but that aside, most modern gear
(last 15yrs at to the lowest degree) has "flush" insulation designed to be worn away by the
brushes.
... Merely worthwhile for tradesmen who volition apply them often enough IMO.
(I accept one of their routers, but I incertitude I'll ever get my moneys worth out
of it unfortunately
So the shops offer you the alternative. What's your point?
Nobody who has e'er used one, would really compare them to the Chinese
brands.
Nonetheless inexpensive tools practise take their place for weekend handymen.
MrT.
In my contempo feel, DeWalt make DeWalt is only a viable tool for tradesmen, or people who take too much
money. If y'all desire a good saw, I would suggest Makita, closely followed by
Ryobi for the home handyman who does a fair corporeality of work. If it is
required for the in one case or twicw a year job, then go for the BMG or Skill.
It is difficult to see whatever difference to justify their high price when
compared to the other brands (ignoring yum cha'due south). I vaguely recollect
someone explaining they were asian made at present.
I've met a few tradesman who don't feel that mode and just find information technology more than
economical to buy eye quality and use them up, then supplant them. YMMV.
That is always an interesting practice; looking at but how desperately made
they are.
My high torque (triple geared) wrist snapper is Makita and it was/is
worth the coin. AEG, Ryobi, ???, ??, ??.
The B&Ds were disasters.
Guest

The cheap Ryobi seems to exist the same particular every bit some of the Cheapy
supermarket
special, merely a few corrective changes. The Ryobi drill press I have is
Exactly the same as the Generic brand apart from ii small bits of
plastic.
I'll probhably just buy a cheapy replacement. It only gets used 3 or iv
times a year.
The NZ Kmart advertising paower tools (incl saws) for NZ$25. Just how
can they brand them that cheap
Truthful.
I bought a DEwalt cordless drill in 1995 for almost $450. Its still
running well now, in spite of eleven years of regular utilise, beingness dropped
etc. The drill also has a much meliorate experience, and better control than
the cheap ones I had used earlier and since the time.

At the time they were advertised equally existence US fabricated. I dont know about
now. I would be very surprised if they (or annihilation else) werent made
in cathay.
Then the shops offer you lot the alternative. What'south your point? Virtually of the tradies I know use Makita tool. With the battery drills, they
use them til the batteries are knackered and buy a new replacement. Then
they keep the new batteries and give the drill away.
The inexpensive Ryobi seems to be the same item every bit some of the Cheapy I think GMC were ownde by Ryobi at one stage to sell their lower end tools
AIUI, the Ryobi brand was bought by a German who moved manufacturing
to China, and every bit such the modern Ryobi stuff has no relation to the
older.

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