Inaccurate Minute Hand

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  • #50062
    tik246doc
    Participant
    • Topics Started: 4
    • Total Posts: 15

    Howdy all,

    Have just reassembled a basket case. What I believe to be an old Ansonia large school house regulator. Now runs great. However, the minute hand lags about 3 minutes behind the strikes on the hour and half hour. Minute hand was loose on arbor due to wear so I did the old peanut can lid shim trick which took all of the play out of it so it is tight on the arbor. There is 1 minute of play in the arbor, (gear wear?) so that still leaves about a 2 minute difference between the strike and where the hand should be. Any suggestions on a fix? Or just one of those old age- you have to live with it things?

    Thanks

    Rich
    Cambria

    #64886
    willofiam
    Moderator
    • Topics Started: 75
    • Total Posts: 1437

    Hey Rich, yes you can adjust when the locking levers are released. Without seeing exactly what you have I would suggest watching the center ardor while slowly moving the hands, see how the levers are lifted and then dropped to release for the striking. depending on the set up you have there can be slight adjustments to the lifting piece or possibly the lever itself. What can be difficult is getting at it with it in the case and having the dial on, sometimes it becomes a trial and error removing the movement, making the adjustment and testing again. remember adjustments are carefully made and thought thru thoroughly so not to break any parts by bending back and forth too much. @Tik246Doc wrote:

    There is 1 minute of play in the arbor, (gear wear?)

    that is very common, one thing to inspect when going thru a movement is the wheel on the center arbor, if it is the style where the teeth look like a little basket???? (hope that makes sense) sometimes those fingers get bent outwards a bit and can be gently moved back and reduce some of that play. 1 minute of play or backlash is pretty good though. Also, just to mention, if the hand can be mounted turned over (like a cuckoo clock hand that has a square center) generally fit to the arbor when initially set up…. it can have that much or more difference to what the hand shows on the dial.

    #64887
    tik246doc
    Participant
    • Topics Started: 4
    • Total Posts: 15

    William,

    Thank you so much for the response. Your reply gave me a lot to ponder as I tried to get to sleep last night. I have noticed that when the minute hand reaches the hour it is right on. It is on the half hour that I am getting the 3 minute error which makes me think that perhaps a very slight adjustment to the half hour lifting pin just might do it. As I have not yet experienced this problem and all my other projects have come out working just fine, I just never gave it a thought. But you can bet from now on it will be on my checklist on any further re-assemblies. I’ll let you know how it turns out.
    Thanks again. Cant tell you how much it means to us newbies to know we have the support you give us. Have a great day.

    Rich
    Cambria

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tik246docInaccurate Minute Hand