Goal: $300, Received: $370.00 (124%) Contribute Now
Donate whatever you can or Join the 14,000 other NAWCC members for only $80 (plus $10 for hard copy publications). Check it out here.



Page 2 of 2 FirstFirst 12
Results 16 to 24 of 24
  1. #16
    Registered user.
    Join Date
    Oct 2010
    Location
    Calif. USA
    Posts
    12,988

    Default Re: Quartz anniversary clock pendulum mechanism

    I should also note that one should not let a super magnet get anywhere
    near the armatures magnets. They will slam together, most likely shattering
    the ceramic magnets on the armature.
    They will make a mess of a hair spring as well.
    Super magnets are dangerous to soft human tissue. If your finger
    happens to get between the magnet and a metal piece it wants
    to stick to, it will pinch skin enough to draw blood.
    Tinker Dwight

  2. #17

    Default Re: Quartz anniversary clock pendulum mechanism (By: Tinker Dwight)

    The latest development is that I have tried filing down the side pillars to effectively raise the position of the pendulum, but this has not made any difference. It is correct that there are 2 colours of wire to the coils so I will test the resistance with an avo-meter. Access to the other electronic components would involve splitting the top case and removing the rear section, but this would also mean releasing the hair spring on the pendulum, which I am reluctant to do.

  3. #18
    Registered user. roughbarked's Avatar
    Join Date
    Dec 2016
    Location
    Western NSW, Australia
    Posts
    1,263

    Default Re: Quartz anniversary clock pendulum mechanism

    Quote Originally Posted by johnrams View Post
    The latest development is that I have tried filing down the side pillars to effectively raise the position of the pendulum, but this has not made any difference. It is correct that there are 2 colours of wire to the coils so I will test the resistance with an avo-meter. Access to the other electronic components would involve splitting the top case and removing the rear section, but this would also mean releasing the hair spring on the pendulum, which I am reluctant to do.
    Now you know what I meant about not changing anything without knowing what it is there for.
    As for the hairspring, it is only a pin to remove and gently turn the balance until the hairspring is free. Don't lose the pin.

    I strongly recommend that you read back at John Hubby's post. Consider what he mentioned about drag. Look where he mentions a steel pin and a sapphire bearing. See what possibly may be causing drag here. Hairs? Dirt? http://mb.nawcc.org/showthread.php?1...=1#post1097945
    Last edited by roughbarked; 03-16-2017 at 12:44 AM.

  4. #19

    Default Re: Quartz anniversary clock pendulum mechanism (By: roughbarked)

    I confess to not having done anything since the last post, as we have had the birth of a new grandchild! Now this has settled down, I may be able to continue. My question is that if I open up the mechanism and expose the electronics, other than testing the integrity of the coils, what else can I do? I only have limited test equipment - an Avo meter.

  5. #20
    Registered user.
    Join Date
    Oct 2010
    Location
    Calif. USA
    Posts
    12,988

    Default Re: Quartz anniversary clock pendulum mechanism (By: johnrams)

    We can see if it is a transistor or an IC that runs it. If it is
    a transistor, those can be replaced. The IC is only available from
    damaged clocks.
    If the coil is shot they can be rewound.
    Tinker Dwight

  6. #21

    Default Re: Quartz anniversary clock pendulum mechanism (By: johnrams)

    I am in the process of converting a quartz 400 day timepiece to mechanical because the electronics are beyond fixing apart from the hands it will look identical from the front and better from the sides. I offered this route to the customer and he and his wife decided this was what they wanted as it had sentimental value I will post the results if there is interest it will say Quartz on the face which will be a bit odd.
    Stephen Benson - Clock website www.ajsbsa.co.uk There is no time, only clocks

  7. #22

    Default Re: Quartz anniversary clock pendulum mechanism (By: Tinker Dwight)

    I have finally dismantled the mechanism, removed hair spring and pendulum and accessed the circuitry. The coils are both OK - there is continuity tested with my meter. From my limited electronic knowledge, there appears to be a couple of capacitors, resistors, one transistor and a small IC chip on the board. Not sure where I can go from here though.....Click image for larger version. 

Name:	DSC_0422[1].jpg 
Views:	17 
Size:	346.5 KB 
ID:	338496

  8. #23
    Registered user.
    Join Date
    Oct 2010
    Location
    Calif. USA
    Posts
    12,988

    Default Re: Quartz anniversary clock pendulum mechanism (By: johnrams)

    The IC usually just runs the clock movement. The transistor
    runs the pendulum.
    They are usually to separate parts.
    If the coil for the pendulum is still good, there is only
    a small amount of circuitry involved in the pendulum.
    The two likelies are the transistor or the large black
    electrolytic capacitor.
    If you can show the circuit side of the PC board, I can
    check the circuit layout to see if I'm right about the
    pendulum and IC being separate.
    Also if you could indicate the power supply polarity,
    that will help me as well.
    Tinker Dwight

  9. #24
    Registered user.
    Join Date
    Oct 2010
    Location
    Calif. USA
    Posts
    12,988

    Default Re: Quartz anniversary clock pendulum mechanism (By: Tinker Dwight)

    My mother in law just brought me a Elgin ( made in the USA ),
    she found at a garage sale.
    It has the motor in the base to spins the pendulum.
    It used the top plastic for a bushing. I checked the plastic
    with brakeklean and it disolved it so I just added oil.
    The circuit looks similar to yours.
    The old oil was really sticky. It still felt like is spun freely
    but the old oil was the problem.
    Fresh oil and spinning it brought it back to life.
    These motors don't have much torque. They are intended
    for long battery life.
    The point is, make sure the bushings are really clean.
    even if it feels quite free, the motors in these use so
    little power that it doesn't take much to stall them.
    Tinker Dwight

Similar Threads

  1. Replies: 0
    Last Post: 05-10-2016, 11:39 PM
  2. Waltham anniversary clock pendulum coil spring
    By David Pardue in forum 400-Day, Atmos and other Torsion Clocks
    Replies: 1
    Last Post: 09-01-2009, 08:13 AM
  3. Quartz Anniversary Clock torsion pendulum driver
    By 107WestStreet in forum Clock Repair
    Replies: 4
    Last Post: 06-13-2006, 01:37 AM
  4. Kundo Quartz Anniversary Clock Suspension Spring Unit
    By Joe Collins in forum Clocks General.
    Replies: 1
    Last Post: 07-09-2005, 11:51 PM
  5. Howard Miller/Kieninger Quartz Anniversary Clock Parts
    By Jim_Miller in forum Clocks General.
    Replies: 5
    Last Post: 03-14-2005, 10:17 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •