Utilize a multimeter to examine the resistance in between mains pins over the plug - for nearly any clock motor, be expecting one thing in extra of 2k ohms for 230V and 1k for 120V motors. Take a Take note in the resistance studying, since you'll will need it later.
Vacuum impregnation with varnish is sweet, and would make the completed career mechanically silent and seem pretty Experienced, but it's not at all vital. Take into account that the clock will now be operating at only 16V, so sturdy insulation just isn't vital.
To focus on the possible challenges that can (and do) arise, There's a part of your diecast scenario that is lacking - It is tough to see while in the Image, nevertheless it's on the sting of the case on the remaining aspect of the first coil. I cleaned this Component of the situation rather some time ago, even so the missing piece was actually blown out by a brief circuited guide.
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Although to some degree short of the figure calculated prior to, it is not more info unreasonable. At the very least we realize that we've been in the correct area. Had the next calculation revealed (one example is) 1,500 turns have been wanted, then it is clear that a miscalculation will have to have been manufactured somewhere. At this stage, you would almost certainly ought to return to the beginning and re-do the measurements.
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The examination winding reveals that the motor will operate fairly happily that has a voltage of about 180mV across the nine transform winding. Current was also measured, and was somewhat more than 2 Amps.
The resistor minimizes the voltage applied to the motor, so you must measure the voltage instantly across the motor terminals.
The course of action described down below calls for connections to mains power, and need to never ever be attempted Unless of course that you are 100% specific within your ability to get measurements of mains energy. An easy slip-up could possibly be lethal.
There remains to be a true risk of electric powered shock, as the output is at normal mains prospective, so if you Make contact with both equally leads at the same time you will even now receive a (maybe lethal) shock. There is absolutely no distinction between the full output of the isolation transformer and ordinary mains, other than that there is no longer a certain Energetic (Dwell) and neutral conductor.
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I'd even changed the weakened outer wrapping around the coil While using the intention of utilizing it at the normal (240V) voltage, but upon more evaluation on the winding I place the clock aside. The inter-layer insulation is just paper, and there is no evidence the coil was impregnated. Continued use with 240V AC is simply too unsafe to look at.