Need wiring diagram for electric drill

Discussion in 'Misc DIY' started by David Nebenzahl, Dec 1, 2006.

  1. This is so simple, I feel kind of foolish posting it, but here goes:

    I need a wiring diagram for my garden-variety 3/8" variable-speed
    reversible drill. (It happens to be a Craftsman, but is the same as
    hundreds of other similar tools.)

    Years (decades, actually) ago I replaced the speed control which I got
    from Sears. The drill has worked since, but not correctly, so evidently
    I screwed up when I put it back together. I think I had to resolder some
    wires to the reversing switch, which is where I think the problem is.

    Here's the deal: it works, but not like it used to. At slow speeds, it
    feels like it's "chugging" or cogging. No sparks from the brushes. At
    medium speeds it runs a little smoother with minimal sparking, about
    what you'd expect. At high speed, it runs with a lot of sparking, more
    than it should.

    The commutator is in good condition: I cleaned it and scraped out all
    the built-up crap between the contact bars. Brushes are in good shape.
    Field and armature coils are all good (tested with ohmmeter).

    So I'd sure appreciate it if someone could post a (link to) a wiring
    diagram for this tool. Like I said, any similar variable-speed
    reversible consumer-quality drill will do.

    Please resist the urge to post if you want to tell me

    * to buy a new tool (this is my favorite drill)
    * I ought to learn a whole lot more about electricity
    * I should leave this kind of repair to "professionals"
    * I should have noted the wiring when I first opened it up.

    --
    Just as McDonald's is where you go when you're hungry but don't really
    care about the quality of your food, Wikipedia is where you go when
    you're curious but don't really care about the quality of your knowledge.

    - Matthew White's WikiWatch (http://users.erols.com/mwhite28/wikiwoo.htm)
     
    David Nebenzahl, Dec 1, 2006
    #1
    1. Advertising

  2. David Nebenzahl

    buffalobill Guest

    http://www3.sears.com/

    David Nebenzahl wrote:
    > This is so simple, I feel kind of foolish posting it, but here goes:
    >
    > I need a wiring diagram for my garden-variety 3/8" variable-speed
    > reversible drill. (It happens to be a Craftsman, but is the same as
    > hundreds of other similar tools.)
    >
    > Years (decades, actually) ago I replaced the speed control which I got
    > from Sears. The drill has worked since, but not correctly, so evidently
    > I screwed up when I put it back together. I think I had to resolder some
    > wires to the reversing switch, which is where I think the problem is.
    >
    > Here's the deal: it works, but not like it used to. At slow speeds, it
    > feels like it's "chugging" or cogging. No sparks from the brushes. At
    > medium speeds it runs a little smoother with minimal sparking, about
    > what you'd expect. At high speed, it runs with a lot of sparking, more
    > than it should.
    >
    > The commutator is in good condition: I cleaned it and scraped out all
    > the built-up crap between the contact bars. Brushes are in good shape.
    > Field and armature coils are all good (tested with ohmmeter).
    >
    > So I'd sure appreciate it if someone could post a (link to) a wiring
    > diagram for this tool. Like I said, any similar variable-speed
    > reversible consumer-quality drill will do.
    >
    > Please resist the urge to post if you want to tell me
    >
    > * to buy a new tool (this is my favorite drill)
    > * I ought to learn a whole lot more about electricity
    > * I should leave this kind of repair to "professionals"
    > * I should have noted the wiring when I first opened it up.
    >
    > --
    > Just as McDonald's is where you go when you're hungry but don't really
    > care about the quality of your food, Wikipedia is where you go when
    > you're curious but don't really care about the quality of your knowledge.
    >
    > - Matthew White's WikiWatch (http://users.erols.com/mwhite28/wikiwoo.htm)
     
    buffalobill, Dec 2, 2006
    #2
    1. Advertising

  3. buffalobill spake thus:

    > David Nebenzahl wrote:
    >
    >>This is so simple, I feel kind of foolish posting it, but here goes:
    >>
    >>I need a wiring diagram for my garden-variety 3/8" variable-speed
    >>reversible drill. (It happens to be a Craftsman, but is the same as
    >>hundreds of other similar tools.)

    >
    > http://www3.sears.com


    Thanks, but sorry, already looked there. Oddly, they list all parts for
    this model drill, but everything is unavailable, including two
    instruction sheets, which may or may not have a wiring diagram. (There's
    an exploded parts diagram, but it doesn't have a schematic.)

    Further info: the drill is wired so that the field and armature are in
    series. (The reversing switch flips the polarity of the armature with
    respect to the field.) Is this typically the way these drills work?


    --
    Just as McDonald's is where you go when you're hungry but don't really
    care about the quality of your food, Wikipedia is where you go when
    you're curious but don't really care about the quality of your knowledge.

    - Matthew White's WikiWatch (http://users.erols.com/mwhite28/wikiwoo.htm)
     
    David Nebenzahl, Dec 2, 2006
    #3
  4. David Nebenzahl

    Guest

    Just buy another drill. They're cheap.

    If you insist on doing this repair, you really should learn more about
    electricity before you tackle the job. You could be electrocuted.
    Spend the winter going to a technical college. Since you obviously
    lack that knowledge, dont touch it until you get an education on
    electricity.
    Otherwise, take it to a professional repair shop, but be prepared to
    pay more than the worth of the drill. But you reap what you sow. If
    you had left the pros do the job in the first place, or at least
    labelled the wires, you would not have this problem now. I hope you
    learned from this mistake.

    If by chance you figured out how to procreate, you could always send
    the drill to your sons Junior High School for their electricity
    classes. They'll take it apart, learn from it, and then repair it for
    you. (for free).

    Tom

    ---------

    On Fri, 01 Dec 2006 14:04:57 -0800, David Nebenzahl
    <> wrote:

    >This is so simple, I feel kind of foolish posting it, but here goes:
    >
    >I need a wiring diagram for my garden-variety 3/8" variable-speed
    >reversible drill. (It happens to be a Craftsman, but is the same as
    >hundreds of other similar tools.)
    >
    >Years (decades, actually) ago I replaced the speed control which I got
    >from Sears. The drill has worked since, but not correctly, so evidently
    >I screwed up when I put it back together. I think I had to resolder some
    >wires to the reversing switch, which is where I think the problem is.
    >
    >Here's the deal: it works, but not like it used to. At slow speeds, it
    >feels like it's "chugging" or cogging. No sparks from the brushes. At
    >medium speeds it runs a little smoother with minimal sparking, about
    >what you'd expect. At high speed, it runs with a lot of sparking, more
    >than it should.
    >
    >The commutator is in good condition: I cleaned it and scraped out all
    >the built-up crap between the contact bars. Brushes are in good shape.
    >Field and armature coils are all good (tested with ohmmeter).
    >
    >So I'd sure appreciate it if someone could post a (link to) a wiring
    >diagram for this tool. Like I said, any similar variable-speed
    >reversible consumer-quality drill will do.
    >
    >Please resist the urge to post if you want to tell me
    >
    >* to buy a new tool (this is my favorite drill)
    >* I ought to learn a whole lot more about electricity
    >* I should leave this kind of repair to "professionals"
    >* I should have noted the wiring when I first opened it up.
     
    , Dec 2, 2006
    #4
  5. David Nebenzahl

    buffalobill Guest

    http://www.toolpartsdirect.com/toolparts.html

    David Nebenzahl wrote:
    > This is so simple, I feel kind of foolish posting it, but here goes:
    >
    > I need a wiring diagram for my garden-variety 3/8" variable-speed
    > reversible drill. (It happens to be a Craftsman, but is the same as
    > hundreds of other similar tools.)
    >
    > Years (decades, actually) ago I replaced the speed control which I got
    > from Sears. The drill has worked since, but not correctly, so evidently
    > I screwed up when I put it back together. I think I had to resolder some
    > wires to the reversing switch, which is where I think the problem is.
    >
    > Here's the deal: it works, but not like it used to. At slow speeds, it
    > feels like it's "chugging" or cogging. No sparks from the brushes. At
    > medium speeds it runs a little smoother with minimal sparking, about
    > what you'd expect. At high speed, it runs with a lot of sparking, more
    > than it should.
    >
    > The commutator is in good condition: I cleaned it and scraped out all
    > the built-up crap between the contact bars. Brushes are in good shape.
    > Field and armature coils are all good (tested with ohmmeter).
    >
    > So I'd sure appreciate it if someone could post a (link to) a wiring
    > diagram for this tool. Like I said, any similar variable-speed
    > reversible consumer-quality drill will do.
    >
    > Please resist the urge to post if you want to tell me
    >
    > * to buy a new tool (this is my favorite drill)
    > * I ought to learn a whole lot more about electricity
    > * I should leave this kind of repair to "professionals"
    > * I should have noted the wiring when I first opened it up.
    >
    > --
    > Just as McDonald's is where you go when you're hungry but don't really
    > care about the quality of your food, Wikipedia is where you go when
    > you're curious but don't really care about the quality of your knowledge.
    >
    > - Matthew White's WikiWatch (http://users.erols.com/mwhite28/wikiwoo.htm)
     
    buffalobill, Dec 2, 2006
    #5
  6. David Nebenzahl

    dpb Guest

    David Nebenzahl wrote:
    ....
    > I need a wiring diagram for ...variable-speed...reversible drill. ...
    > ...I replaced the speed control ...has worked since, but not correctly
    > ...
    > Here's the deal: it works, but not like it used to. At slow speeds, it
    > feels like it's "chugging" or cogging. No sparks from the brushes. At
    > medium speeds it runs a little smoother with minimal sparking, about
    > what you'd expect. At high speed, it runs with a lot of sparking, more
    > than it should.
    >
    > The commutator is in good condition: I cleaned it and scraped out all
    > the built-up crap between the contact bars. Brushes are in good shape. ...


    If it runs and variable speed is functional, it isn't a simple wiring
    problem. The spitzen-sparken and erratic running at low speed is
    indicative of the brushes not fitting correctly. I'd hazard a guess
    the combination of "cleaning" the commutator and perhaps turning the
    brushes around or otherwise getting them mis-aligned is the primary
    problem...
     
    dpb, Dec 2, 2006
    #6
  7. David Nebenzahl

    krw Guest

    In article <>,
    says...
    > wrote:
    > > Just buy another drill. They're cheap.

    >
    > Why buy another? It's a Craftsman. Take it back to Sears and they'll replace
    > it.


    The Craftsman "lifetime warranty" is only on hand tools. Read the
    information that comes with the power tools and you'll find the
    warranty more like a year.

    Buy another, but not from Sears.

    >
    >
    >


    --
    Keith
     
    krw, Dec 2, 2006
    #7
  8. dpb spake thus:

    > David Nebenzahl wrote:
    > ...
    >
    >>I need a wiring diagram for ...variable-speed...reversible drill. ...
    >>...I replaced the speed control ...has worked since, but not correctly
    >> ...
    >>Here's the deal: it works, but not like it used to. At slow speeds, it
    >>feels like it's "chugging" or cogging. No sparks from the brushes. At
    >>medium speeds it runs a little smoother with minimal sparking, about
    >>what you'd expect. At high speed, it runs with a lot of sparking, more
    >>than it should.
    >>
    >>The commutator is in good condition: I cleaned it and scraped out all
    >>the built-up crap between the contact bars. Brushes are in good shape. ...

    >
    > If it runs and variable speed is functional, it isn't a simple wiring
    > problem. The spitzen-sparken and erratic running at low speed is
    > indicative of the brushes not fitting correctly. I'd hazard a guess
    > the combination of "cleaning" the commutator and perhaps turning the
    > brushes around or otherwise getting them mis-aligned is the primary
    > problem...


    Then you'd guess wrong.

    Reread my original post. The drill runs without *any* sparking at low
    speeds. At medium speed it runs with the normal amount of sparking
    expected from such a motor. The brushes are clean and fit the commutator
    well. It only sparks at high speed.

    At this point, my question is a simple one. I direct this to ANYONE WHO
    ACTUALLY KNOWS THE ANSWER AND CAN GIVE IT MINUS A LECTURE ON LEARNING
    BASIC ELECTRICAL PRINCIPLES (which I do know):

    Are drills like these wired with the field and armature in series (as it
    is now) or in parallel? Simple question. (Sorry for shouting above!)


    --
    Just as McDonald's is where you go when you're hungry but don't really
    care about the quality of your food, Wikipedia is where you go when
    you're curious but don't really care about the quality of your knowledge.

    - Matthew White's WikiWatch (http://users.erols.com/mwhite28/wikiwoo.htm)
     
    David Nebenzahl, Dec 2, 2006
    #8
  9. buffalobill spake thus:

    > David Nebenzahl wrote:
    >
    >>This is so simple, I feel kind of foolish posting it, but here goes:
    >>
    >>I need a wiring diagram for my garden-variety 3/8" variable-speed
    >>reversible drill. (It happens to be a Craftsman, but is the same as
    >>hundreds of other similar tools.)

    >
    > http://www.toolpartsdirect.com/toolparts.html


    Your earlier link (Sears itself) was better. This place doesn't carry
    parts for Sears/Craftsman. Pretty sure only Sears itself does that.
    Didn't you check the list before you posted this?


    --
    Just as McDonald's is where you go when you're hungry but don't really
    care about the quality of your food, Wikipedia is where you go when
    you're curious but don't really care about the quality of your knowledge.

    - Matthew White's WikiWatch (http://users.erols.com/mwhite28/wikiwoo.htm)
     
    David Nebenzahl, Dec 2, 2006
    #9
  10. David Nebenzahl

    propman Guest

    David Nebenzahl <> wrote in news:4571ce59$0$5806
    $:

    > buffalobill spake thus:
    >
    >> David Nebenzahl wrote:
    >>
    >>>This is so simple, I feel kind of foolish posting it, but here goes:
    >>>
    >>>I need a wiring diagram for my garden-variety 3/8" variable-speed
    >>>reversible drill. (It happens to be a Craftsman, but is the same as
    >>>hundreds of other similar tools.)

    > >
    > > http://www.toolpartsdirect.com/toolparts.html

    >
    > Your earlier link (Sears itself) was better. This place doesn't carry
    > parts for Sears/Craftsman. Pretty sure only Sears itself does that.
    > Didn't you check the list before you posted this?
    >
    >




    And maybe you should check what you originally wrote in your initial
    request...to whit:

    <quote on>

    "So I'd sure appreciate it if someone could post a (link to) a wiring
    diagram for this tool. Like I said, any similar variable-speed
    reversible consumer-quality drill will do."

    <quote off>


    Seems to me that his site referal fufills the second statement........
    :)
     
    propman, Dec 2, 2006
    #10
  11. propman spake thus:

    > David Nebenzahl <> wrote in news:4571ce59$0$5806
    > $:
    >
    >>buffalobill spake thus:
    >>
    >>>David Nebenzahl wrote:
    >>>
    >>>>This is so simple, I feel kind of foolish posting it, but here goes:
    >>>>
    >>>>I need a wiring diagram for my garden-variety 3/8" variable-speed
    >>>>reversible drill. (It happens to be a Craftsman, but is the same as
    >>>>hundreds of other similar tools.)
    >>>
    >>>http://www.toolpartsdirect.com/toolparts.html

    >>
    >>Your earlier link (Sears itself) was better. This place doesn't carry
    >>parts for Sears/Craftsman. Pretty sure only Sears itself does that.
    >>Didn't you check the list before you posted this?

    >
    > And maybe you should check what you originally wrote in your initial
    > request...to whit:


    You meant to type "to wit", no?

    > <quote on>
    >
    > "So I'd sure appreciate it if someone could post a (link to) a wiring
    > diagram for this tool. Like I said, any similar variable-speed
    > reversible consumer-quality drill will do."
    >
    > <quote off>
    >
    > Seems to me that his site referal fufills the second statement........
    > :)


    Have you checked either of the sites he sent links to? Neither has
    wiring diagrams for *anything*. I checked. Nada. Zip.

    Lots of exploded parts diagrams, though.


    --
    Just as McDonald's is where you go when you're hungry but don't really
    care about the quality of your food, Wikipedia is where you go when
    you're curious but don't really care about the quality of your knowledge.

    - Matthew White's WikiWatch (http://users.erols.com/mwhite28/wikiwoo.htm)
     
    David Nebenzahl, Dec 3, 2006
    #11
  12. David Nebenzahl

    buffalobill Guest

    other drill users may find this text informative:
    http://www.repairfaq.org/REPAIR/F_appfaqc.html#APPFAQC_008
    and other repair faq save this link:
    http://www.repairfaq.org/REPAIR/F_Repair.html

    David Nebenzahl wrote:
    > This is so simple, I feel kind of foolish posting it, but here goes:
    >
    > I need a wiring diagram for my garden-variety 3/8" variable-speed
    > reversible drill. (It happens to be a Craftsman, but is the same as
    > hundreds of other similar tools.)
    >
    > Years (decades, actually) ago I replaced the speed control which I got
    > from Sears. The drill has worked since, but not correctly, so evidently
    > I screwed up when I put it back together. I think I had to resolder some
    > wires to the reversing switch, which is where I think the problem is.
    >
    > Here's the deal: it works, but not like it used to. At slow speeds, it
    > feels like it's "chugging" or cogging. No sparks from the brushes. At
    > medium speeds it runs a little smoother with minimal sparking, about
    > what you'd expect. At high speed, it runs with a lot of sparking, more
    > than it should.
    >
    > The commutator is in good condition: I cleaned it and scraped out all
    > the built-up crap between the contact bars. Brushes are in good shape.
    > Field and armature coils are all good (tested with ohmmeter).
    >
    > So I'd sure appreciate it if someone could post a (link to) a wiring
    > diagram for this tool. Like I said, any similar variable-speed
    > reversible consumer-quality drill will do.
    >
    > Please resist the urge to post if you want to tell me
    >
    > * to buy a new tool (this is my favorite drill)
    > * I ought to learn a whole lot more about electricity
    > * I should leave this kind of repair to "professionals"
    > * I should have noted the wiring when I first opened it up.
    >
    > --
    > Just as McDonald's is where you go when you're hungry but don't really
    > care about the quality of your food, Wikipedia is where you go when
    > you're curious but don't really care about the quality of your knowledge.
    >
    > - Matthew White's WikiWatch (http://users.erols.com/mwhite28/wikiwoo.htm)
     
    buffalobill, Dec 3, 2006
    #12
  13. On Sat, 02 Dec 2006 11:08:08 -0800, David Nebenzahl <>
    wrote:

    >dpb spake thus:
    >
    >> David Nebenzahl wrote:
    >> ...
    >>
    >>>I need a wiring diagram for ...variable-speed...reversible drill. ...
    >>>...I replaced the speed control ...has worked since, but not correctly
    >>> ...
    >>>Here's the deal: it works, but not like it used to. At slow speeds, it
    >>>feels like it's "chugging" or cogging. No sparks from the brushes. At
    >>>medium speeds it runs a little smoother with minimal sparking, about
    >>>what you'd expect. At high speed, it runs with a lot of sparking, more
    >>>than it should.
    >>>
    >>>The commutator is in good condition: I cleaned it and scraped out all
    >>>the built-up crap between the contact bars. Brushes are in good shape. ...

    >>
    >> If it runs and variable speed is functional, it isn't a simple wiring
    >> problem. The spitzen-sparken and erratic running at low speed is
    >> indicative of the brushes not fitting correctly. I'd hazard a guess
    >> the combination of "cleaning" the commutator and perhaps turning the
    >> brushes around or otherwise getting them mis-aligned is the primary
    >> problem...

    >
    >Then you'd guess wrong.
    >
    >Reread my original post. The drill runs without *any* sparking at low
    >speeds. At medium speed it runs with the normal amount of sparking
    >expected from such a motor. The brushes are clean and fit the commutator
    >well. It only sparks at high speed.
    >
    >At this point, my question is a simple one. I direct this to ANYONE WHO
    >ACTUALLY KNOWS THE ANSWER AND CAN GIVE IT MINUS A LECTURE ON LEARNING
    >BASIC ELECTRICAL PRINCIPLES (which I do know):
    >
    >Are drills like these wired with the field and armature in series (as it
    >is now) or in parallel? Simple question. (Sorry for shouting above!)


    Beggars can't be choosers, and your behavior does not inspire anyone
    knowlegeable to help you. Next time you want to ask a question on usenet, I
    suggest that you don't tell people whjat answers are unacceptable, and thank
    everyone who makes an attempt to help you whether the information is helpful to
    you or not.

    CWM
     
    Charlie Morgan, Dec 3, 2006
    #13
  14. David Nebenzahl

    dpb Guest

    David Nebenzahl wrote:
    > dpb spake thus:
    >
    > > David Nebenzahl wrote:
    > > ...
    > >

    ....
    > >>...At slow speeds, it feels like it's "chugging" or cogging. ...


    > > If it runs and variable speed is functional, it isn't a simple wiring
    > > problem. The spitzen-sparken and erratic running at low speed is
    > > indicative of the brushes not fitting correctly. I'd hazard a guess
    > > the combination of "cleaning" the commutator and perhaps turning the
    > > brushes around or otherwise getting them mis-aligned is the primary
    > > problem...

    >
    > Then you'd guess wrong.
    >
    > Reread my original post. The drill runs without *any* sparking at low
    > speeds. ...


    It also runs (as the _retained_ quote _from_ your original post shows)
    poorly. A very good description, in fact of what poorly fitting
    brushes or damaged/rough commutator edges act like.

    Was simply trying to point out an area that seems more likely than
    miswiring, but if you know better then fix it as you see fit.

    ....
    > BASIC ELECTRICAL PRINCIPLES (which I do know):
    >
    > Are drills like these wired with the field and armature in series (as it
    > is now) or in parallel? Simple question. (Sorry for shouting above!)


    Then you obviously must know how motors work and have the answer to
    your question available by applying same.
     
    dpb, Dec 3, 2006
    #14
  15. dpb spake thus:

    > David Nebenzahl wrote:
    >
    >>dpb spake thus:

    >
    >>Are drills like these wired with the field and armature in series (as it
    >>is now) or in parallel? Simple question. (Sorry for shouting above!)

    >
    > Then you obviously must know how motors work and have the answer to
    > your question available by applying same.


    I know how motors like this work *in general*, but obviously I don't
    know this specific detail--whether the field & armature should be
    connected in series or parallel. That's why I asked the question. If you
    know the answer, it would be appreciated.


    --
    Just as McDonald's is where you go when you're hungry but don't really
    care about the quality of your food, Wikipedia is where you go when
    you're curious but don't really care about the quality of your knowledge.

    - Matthew White's WikiWatch (http://users.erols.com/mwhite28/wikiwoo.htm)
     
    David Nebenzahl, Dec 3, 2006
    #15
  16. David Nebenzahl

    propman Guest

    David Nebenzahl <> wrote in news:457240a3$0$5782
    $:

    > propman spake thus:
    >
    >> David Nebenzahl <> wrote in news:4571ce59$0

    $5806
    >> $:
    >>
    >>>buffalobill spake thus:
    >>>
    >>>>David Nebenzahl wrote:
    >>>>
    >>>>>This is so simple, I feel kind of foolish posting it, but here

    goes:
    >>>>>
    >>>>>I need a wiring diagram for my garden-variety 3/8" variable-speed
    >>>>>reversible drill. (It happens to be a Craftsman, but is the same as
    >>>>>hundreds of other similar tools.)
    >>>>
    >>>>http://www.toolpartsdirect.com/toolparts.html
    >>>
    >>>Your earlier link (Sears itself) was better. This place doesn't carry
    >>>parts for Sears/Craftsman. Pretty sure only Sears itself does that.
    >>>Didn't you check the list before you posted this?

    >>
    >> And maybe you should check what you originally wrote in your initial
    >> request...to whit:

    >
    > You meant to type "to wit", no?



    Nope.........asshole!

    >
    >> <quote on>
    >>
    >> "So I'd sure appreciate it if someone could post a (link to) a wiring
    >> diagram for this tool. Like I said, any similar variable-speed
    >> reversible consumer-quality drill will do."
    >>
    >> <quote off>
    >>
    >> Seems to me that his site referal fufills the second

    statement........
    >> :)

    >
    > Have you checked either of the sites he sent links to? Neither has
    > wiring diagrams for *anything*. I checked. Nada. Zip.



    Wrong again, asshole.......it clearly shows wiring DIAGRAMS.......if you
    want the SCHEMATIC then you should have asked for the SCHEMATIC!


    >
    > Lots of exploded parts diagrams, though.
    >
    >


    Take your fucking attitude and shove it where the sun don't
    shine.........
     
    propman, Dec 4, 2006
    #16
  17. propman spake thus:

    > Take your fucking attitude and shove it where the sun don't
    > shine.........


    What's the problem--got a low threshold? off your meds?


    --
    Just as McDonald's is where you go when you're hungry but don't really
    care about the quality of your food, Wikipedia is where you go when
    you're curious but don't really care about the quality of your knowledge.

    - Matthew White's WikiWatch (http://users.erols.com/mwhite28/wikiwoo.htm)
     
    David Nebenzahl, Dec 4, 2006
    #17
  18. David Nebenzahl

    Camperken Guest

    On Sat, 02 Dec 2006 11:08:08 -0800, David Nebenzahl
    <> wrote:
    >Reread my original post. The drill runs without *any* sparking at low
    >speeds. At medium speed it runs with the normal amount of sparking
    >expected from such a motor. The brushes are clean and fit the commutator
    >well. It only sparks at high speed.
    >
    >At this point, my question is a simple one. I direct this to ANYONE WHO
    >ACTUALLY KNOWS THE ANSWER AND CAN GIVE IT MINUS A LECTURE ON LEARNING
    >BASIC ELECTRICAL PRINCIPLES (which I do know):
    >
    >Are drills like these wired with the field and armature in series (as it
    >is now) or in parallel? Simple question. (Sorry for shouting above!)
    >

    MOST power tool motors are wired in series. Heavy sparking at high
    speed is indicative of bad brushes or loose comutator bars, One
    loose commutator bar will not have to move much at the speed these
    armatures rotate to cause arcing.

    John Normile
     
    Camperken, Dec 4, 2006
    #18
  19. David Nebenzahl

    propman Guest

    David Nebenzahl <> wrote in news:4573b83b$0$5803
    $:

    > propman spake thus:
    >
    >> Take your fucking attitude and shove it where the sun don't
    >> shine.........

    >
    > What's the problem--got a low threshold? off your meds?
    >
    >



    See above.......and apply.
     
    propman, Dec 4, 2006
    #19
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