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SP10 clock runs a little over an hour slow per day.

The clock runs slow. I changed the jumpers from 0010 to 0001 as per the chart in the instructions. Now I can use the clock as a fan it is going so fast ok, sleight exaggeration, but not much. Although I do like how fast the gears are turning, but I would like to know how to adjust it for the proper time. Any suggestions would be appreciated. Thank you

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Steve
Steve
Nov 18

Does the second hand move at the proper rate? If the clock is losing an hour per day. then the second hand would only move 57 seconds per minute. That much of a discrepancy should be detectable with a stopwatch. If the second hand is accurate, but the clock still loses time, then maybe the friction clutch is slipping. This would indicate not enough pressure in the spring or friction in the minute and/or hour hand gears.


Also, is there a blinking LED on the board? One LED is always on indicating power. The second LED should blink if the RTC is tracking properly. A non-blinking LED indicates a non-detected RTC and the rate will be off.


One additional error occurred on my mom's clock caused by a bad 5V USB power source. 5V power would drop out every minute or two and the clock would briefly stop and have to start up again. This error was noticeable by the non-smooth motion on the second hand. The clock would also make a ticking sound when the stepper motors power up again.

Added 6 V to SP7 as suggested...no joy!!

Help. As suggested in other post regarding the pendulum not swinging far enough, I added a 6V power plug and still have the same issue. The pendulum swing is close but just not far enough. Can anyone suggest a fix for this?



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hoppy
Nov 05

I am sure you know that the magnet must be as close to the coil as possible and I used a rare earth magnet (neodymium) because they are much more powerful than

the iron type. The new magnet would increase the swing. I can't remember if your present magnet must be installed with a polarity or not but it may be worth while to reverse the magnet and give it a try. It also may be that the pendulum may be too heavy not allowing the magnetic pulse to push it far enough. One other thing I noticed is the ratchet wheel is allowed to move backward with the paw. This would also require more swing from the pendulum .

Edited

Just built electromagnetic clock. Can't get the ratchet to work right.

I have tied several pawls and clips trying to get this clock to ratchet correctly. I got it to the point where the pendulum swings twice before advancing the ratchet gear. It seems that the pendulum is not swinging far enough. What is happening is when I put the pawl and clip at the top most hole the pendulum swing a wide arc. As I move the pawl and clip down the pendulum arc becomes less and less resulting in the same pendulum swinging twice before advancing the gear. I don't understand why the pendulum arc is less the further down the holes I go. Doesn't make sense to me.

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SP7 pendulum assembly

I have ordered 3 separate pendulum movements from Aliexpress. They all show pictures that jibe with the instructions, but when they arrive, they have surface mount components instead of the large size caps and resistors shown in the instructions. The problem I am having is that they don't seem to have enough oomph to swing the pendulum far enough to engage the ratchet wheel. It swings, just not far enough. The bearings and mechanical portion of the clock seems to run well. Does anyone know a workaround or where I can find the appropriate pendulum driver? Any suggestions welcome. Thanks

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brauscher
Nov 02

I am having the same issue

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