Use a multimeter to check the resistance amongst mains pins around the plug - for almost any clock motor, count on a little something in excessive of 2k ohms for 230V and 1k for 120V motors. Take a note in the resistance examining, simply because you'll require it later on.
Bear in mind Just about no aged clock is even equipped with a fuse (I've not witnessed one nevertheless), so there's no protection in any respect in opposition to surplus latest caused by an inside fault.
There are several ways to ascertain the volume of turns needed to operate a clock motor at another voltage from the original structure benefit. The method explained down below is good, but could be a tad elaborate if taken to extremes (as I did in The outline).
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An Total wrap of black tape finishes off the coil, which was very first soaked in varnish, then drained and baked at all around a hundred°C for a couple of hours. The completed low voltage Telechron motor is proven down below.
The measurements demonstrate which the motor coils are Nearly similar. The nameplate ranking is once more 2W, and also the motor coil draws 22mA in usual use. This really is these types of a small difference from the Telechron that it can be dismissed.
As you'll be able to see, the motion is filthy, and what You cannot see would be that the motion get the job done intermediate wheel provides a broken pivot. I chose not to wash (or maintenance) it before the take a look at since I preferred to see if it could be created to run in its present condition. Of significantly greater concern than the gunge everywhere in the movement could be the affliction of the motor coil.
8 Hammond Electrical Alarm Clock The Hammond clock utilizes a completely distinct sort of synchronous motor, but The essential theory is exactly the same. We have to take the exact same measurements, and run the identical initial test treatment to find out the the best possible amount of turns.
Must someone else be unaware of your existence or need with the isolation transformer, any safety gain is immediately shed. Need to the clock alter palms a number of occasions, it is nearly confirmed that the transformer won't be employed at some time - It'll be missing or discarded as 'not essential'.
This method in all fairness straightforward, and isn't going to need any specialised gear. You are doing will need to ensure that the examination coil is wound with heavy gauge wire though, or you'll get a resistive decline that is likely to make it appear that you simply require a lot more turns than important.
Again, when you do this, the wire needs to be no less than 1mm diameter. It is predicted that the majority of people will likely not Use a Variac obtainable, so we will use resistors to reduce the voltage and existing to anything wise.
Naturally, For anyone who is particular of the capabilities and also have a set of mains electrical clocks, it might be really worth your when.
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