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Help: Hougen Magnetic Drill Problem

Discussion in 'Electronic Repair' started by [email protected], Apr 11, 2013.

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  1. 2.com

    2.com Guest

    I have a Hougen Magnetic Drill that is not working.
    http://i290.photobucket.com/albums/ll257/Statenislander/Tools/Hougen3_zpse1f7add1.jpg

    The Magnet itself seems to work, but the drill portion doesn't. Not counting when it turned on a couple of times two days ago, making me think that there was a possible intermittent break somewhere in the connections.

    I opened it up and tinkered with the safety switch adjustment screw, but that wasn't the problem.
    http://i290.photobucket.com/albums/...enSafetySwitchAdjustmentScrew_zpsf865d83a.jpg

    The safety switch is located on the bottom of the drill. The bottom of the drill must be flat against the metal surface in order for the drill to power on. (See the two buttons at the bottom):
    http://i290.photobucket.com/albums/...ols/HougenBottom-SafetySwitch_zps3e32a032.jpg

    The third button in the center is I believe also a safety switch that will cut power to the motor if the drill's magnetic base drifts as much as 1/2".

    I assumed that there is nothing wrong with the AC cord because the magnet portion works, so using my Fluke 79III multimeter on the Ohm setting I tested the start and the stop buttons. There was activity on the Multimeter's display screen when I press either, so I assume that there is no break, at least as far as where those leads connect to the circuit board.
    http://i290.photobucket.com/albums/...ls/HougenStart-StopConnectors_zps3495c450.jpg

    Would it be plausible to re-flow the solder on the circuit board in case there is a cold solder joint somewhere?

    I can't travel several hours round trip to spend $65 an hour at an authorized repair location, so any advice on how to proceed would be appreciated.

    Thanks.

    Darren Harris
    Staten Island, New York.
     
  2. N_Cook

    N_Cook Guest

    I have a Hougen Magnetic Drill that is not working.
    http://i290.photobucket.com/albums/ll257/Statenislander/Tools/Hougen3_zpse1f
    7add1.jpg

    The Magnet itself seems to work, but the drill portion doesn't. Not counting
    when it turned on a couple of times two days ago, making me think that there
    was a possible intermittent break somewhere in the connections.

    I opened it up and tinkered with the safety switch adjustment screw, but
    that wasn't the problem.
    http://i290.photobucket.com/albums/ll257/Statenislander/Tools/HougenSafetySw
    itchAdjustmentScrew_zpsf865d83a.jpg

    The safety switch is located on the bottom of the drill. The bottom of the
    drill must be flat against the metal surface in order for the drill to power
    on. (See the two buttons at the bottom):
    http://i290.photobucket.com/albums/ll257/Statenislander/Tools/HougenBottom-S
    afetySwitch_zps3e32a032.jpg

    The third button in the center is I believe also a safety switch that will
    cut power to the motor if the drill's magnetic base drifts as much as 1/2".

    I assumed that there is nothing wrong with the AC cord because the magnet
    portion works, so using my Fluke 79III multimeter on the Ohm setting I
    tested the start and the stop buttons. There was activity on the
    Multimeter's display screen when I press either, so I assume that there is
    no break, at least as far as where those leads connect to the circuit board.
    http://i290.photobucket.com/albums/ll257/Statenislander/Tools/HougenStart-St
    opConnectors_zps3495c450.jpg

    Would it be plausible to re-flow the solder on the circuit board in case
    there is a cold solder joint somewhere?

    I can't travel several hours round trip to spend $65 an hour at an
    authorized repair location, so any advice on how to proceed would be
    appreciated.

    Thanks.

    Darren Harris
    Staten Island, New York.

    +++++

    'scuse my ingnorance , but
    do the magnets in the base really hold the drill static on to sheet steel,
    opposing all the reactive torques and forces of large cutting bits?
     
  3. 2.com

    2.com Guest

    Here are the Manuals for my model:
    http://www.hougen.com/downloads/10904.pdf
    http://www.hougen.com/downloads/misc_pdf/05346_Retro_Kit_Instructions.pdf
    http://www.hougen.com/downloads/misc_pdf/02224_904threaded_spind.pdf

    After taking out the screws I couldn't figure out how to separate the motorhousing from the slide. (I tried using a rubber mallet to knock it loose).But I unscrewed the top plate and saw where the brushes were located and then got to them by unscrewing the small circular plastic covers at oppositesides near the top of the drill housing.

    http://i290.photobucket.com/albums/ll257/Statenislander/Tools/HougenMotorBrushes_zps466ba0d6.jpg

    How do I know they are still good? (The rectangular brushes are about 1/2" x 5/8" x 3/16").

    Anyway, I put the drill back together and while progressively manipulating the safety switch adjustment between power up tries I got to the point where the drill would turn on, which it wouldn't do before.

    So I'm still at a loss as to what the problem was. I probably didn't re-insert the brushes *exactly* the way I took them out and was wondering if thatmight be the reason it is working now.

    What other procedures should I undertake before I start re-flowing solder on the control PCB? (Since I have to sell the drill I want to be sure it is working properly). Can anyone tell me where I can find new brushes?

    Thanks a lot.

    Darren Harris
    Staten Island, New York.
     
  4. 2.com

    2.com Guest

    I did replace the brushes in the same holders they came out of, but *may* have put one or both back in upside down from how they came out.

    Also,I only use my multimeters for the basics and don't really know their functions in depth. So I can only note whether or not the display changes and the number read-outs. But not necessarily what they mean unless I'm just measuring AC or DC voltage or something like that.

    Thanks.

    Darren Harris
    Staten Island, New York.
     
  5. 2.com

    2.com Guest

    Yes. And I didn't receive a single response, which is why I posted here. :)

    Darren Harris
    Staten Island, New York.
     
  6. 2.com

    2.com Guest

    I turned it on and wacked it a few times with a rubber mallet over the course of a week and it worked every time.

    So I guess it is ok for now. At least I'll know what to do the next time something like this happens.

    Thanks a lot.

    Darren Harris
    Staten Island, New York.
     
  7. Paul Drahn

    Paul Drahn Guest

    atenislander/Tools/HougenBottom-SafetySwitch_zps3e32a032.jpg> > > > > > The third button in the center is I believe also a safety switch that will cut power to the motor if the drill's magnetic base drifts as much as 1/2".> > > > > > I assumed that there is nothing wrong with the AC cord because the magnet portion works, so using my Fluke 79III multimeter on the Ohm setting I tested the start and the stop buttons. There was activity on the Multimeter's display screen when I press either, so I assume that there is no break, at least as far as where those leads connect to the circuit board.> > > http://i290.photobucket.com/albums/...ls/HougenStart-StopConnectors_zps3495c450.jpg> > > > > > Would it be plausible to re-flow the solder on the circuit board in case there is a cold solder joint somewhere?> > > > > > I can't travel several hours round trip to spend $65 an hour at an authorized repair location, so any advice on how to proceed wou
    ld be appreciated.> > > > > > Thanks.> > > > > > Darren Harris> > > Staten Island, New York.> > > > > > Have you asked on news:rec.crafts.metalworking where there are a> > number of people who own these tools? Yes. And I didn't receive a single response, which is why I posted here. :) Darren Harris Staten Island, New York.
    Classic symptom of brushes sticking in their holders. May be brushes
    worn so much they jam in the holders.

    Paul
     
  8. 2.com

    2.com Guest

    Well, what I meant was that wacking it with the rubber mallet didn't make it *stop* working. It has worked perfectly since I put the brushes back in.

    Darren Harris
    Staten Island, New York.
     
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