Re: how to.inspect.motor?
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As with everything, there are differances. Those are from small armature to huge ones. So any method to clean out the insulation, mica, would vary in size and method. I mentioned hacksaw blade because that worked on all the generators and starters I used to constantly rebuild back in the day. I rather used the hacksaw blade than the machine we had.? So for all those that just do a few, a proper machine makes no sense. And yes, a properly cut and squared commutators should be sought after. Then sand for a nice smooth? surface. So basically, use what works for you.
george
On Wednesday, July 3, 2024 at 09:59:18 AM PDT, Jon Rus via groups.io <byghtn5@...> wrote:
Ralph,?
Truly any thing that gets the job done
with the lease amount of damage, is the "correct" tool.
.
You need to clean the gap, then lower
the material in the gap to below the surface of the commutator
contacts,?
so that, as it wears more during use,
it (they)does not begin to hold the brush up off of the contact
area.
.
Did you see the installed brushes
contacting the armature w/o the end cap yet?
Do they remain straight when contacting
the armature?
Any new photos?
.
Good Luck!
On 7/3/2024 10:18 AM, Ralph Hulslander
wrote:
RE: "
?It has a short piece of hacksaw blade mounted for cleaning out
the slots"
I thought someone?had said it was not a good idea to use a
hacksaw?blade.
I know the Armature lathes have a rotating mental bit to
clean the slots.
So is there a difference?
Ralph
I have another armature lathe , that I bought 20=30 years
back . Had no idea what it was , I have a weakness for
things that seem bitchin & much to my wife's dismay I
have way to many . It has a short piece of hacksaw blade
mounted for cleaning out the slots . After kicking it
around for a bunch of years I bought the one I posted
earlier & When I did a Ebay search to see what the
Tru-Arc armature lathes were going for low & behold
there was a guy selling the twin to the old bitchin one ,
let me see if I can find a link to that one . It's nowhere
as fancy as the Tru-arc .
animal
One can also take a hacksaw blade and use that to
clean out the insulation. Some may require a bit of
modifying to fit properly.
george
On Monday, July 1, 2024 at 10:42:04 PM PDT,
mike allen <animal@...>
wrote:
??? Mine is identical to the one I linked .
I've seen them on ebay & at some flea
markets . the motor has that long skinny
shaft with a little star washer kinda lookin
cutter that cleans out the grooves on the
communicator .? Let me see if I can find a
longer youtube on it . Mine is over at a
bud's place , We were thinkin on doing some
automotive alternator windmills , but life
got in the way . I installed some new power
in our local NAPA auto parts for their new
alternator tester? when he said gimme a bill
I told him I wanted the old tester , we were
gearing up & then .....
Here's a pretty good tube on one , these
folks have a couple of the l'll buggers .
Ebay has a couple but their pretty darn
proud of them .
this ones pretty good , Lost Creek Machine
had one a ways back they may still ?
animal
On 7/1/24 8:53 PM, Jon Rus via
wrote:
Mike,?
.
I have never seen one of these and this
unit clearly has a label identifying
its'-self.
Is this your actual lathe or similar to
yours?
What does the motor do? Help with
balancing? Missing a chuck that has a cutter
to clear the grooves between the armature
contacts?
Does it have a main drive motor?
.
Nice history lesson.
On 7/1/2024 11:44 PM, mike allen wrote:
I picked up a armature lathe many years
back at a yard sale . I asked the guy how
much for te armature lathe & he said "
is that what that is " . He gave it to me
cause I was the only guy out of 50-75 people
that knew what it was . Have used it a fair
amount over the years .
.?
If ya ever see one of these at a yard sale
& ya can get it cheap their on the handy
side .
I've always used scotch pads instead of
sand paper over teh years , their a bit
cleaner then sand paper . Here's some scotch
pad info that some of ya may find
interesting
SCOTCH-BRITE
GRIT CHART
3M
Scotch Brite Nylon Pads:
7445
- White pad, called Light Duty Cleansing -
(1000) 1200-1500 grit
7448
- Light Grey, called Ultra Fine Hand -
(600-800) 800 grit.
6448
- Green (?), called Light Duty Hand Pad -
(600) 600 grit
7447
- Maroon pad, called General Purpose Hand
- (320-400) 320 grit
6444
- Brown pad, called Extra Duty Hand -
(280-320) 240 grit
7446
- Dark Grey pad, called Blending Pad
(180-220) 150 grit
7440
- Tan pad, called Heavy Duty Hand Pad -
(120-150) 60(?)
Green
Scotch Brite is available EVERYWHERE. It's
600 grit.
Blue
Scotch-Brite is considered to be about
1000 grit.
(The
value inside the parentheses is directly
from 3M.)
3M
Chart
Less
Aggressive --------> More Aggressive
7445
7448 6448 7447 6444 7446 7440
Finer
Finish --------> Coarser Finish
animal
On 7/1/24 7:33 PM, Tony Smith wrote:
You don’t need to turn it, you just
need to clean it.
?
By turn I meant put it in the chuck
and spin it by hand, holding? the
sandpaper in the other.
?
Here’s some good pictures showing
the general idea: ,
obviously a smaller motor than what
you’ve got.
?
“kinda rough” is an
understatement.? Basically that carbon
can build up between the copper rails
and cause a short, might be your
problem.? But yeah, shiny & smooth
is good.? Once you get all the black
gunk off you be able to see if there any
further damage that you’ll need a lathe
to fix, things like gouges &
pitting.
?
What do you mean by belt?
?
Tony
?
?
?
?
My other lathe is not running so I
cannot turn the commutator.
That commutator does look kinda rough.
What is the belt?
Ralph
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