Hi. Sorry if this is not the right place for my question.
I have been given an ancient card clocking-in machine. It, and presumably others around a factory were once controlled by a central master pulse sent twice a minute. Some clever person, before my ownership, designed a pulse sender to fit inside the clock case. The clock works but when the pulse is sent, the mechanism, (a pair of large electromagnets acting on a lever) make a rather loud CADONK!
Here's my question. Can you give me advice on how to make that electromagnet pull-down slower and hence quieter?
I was wondering about a large value capacitor across the coils.
If this idea will not work, I was wondering about using a cam on a stepper motor with a 30-second revolution to push the lever instead of the pulse sender. The engineering for that might be beyond my abilities though.
Many thanks to anybody who replies!
Neil
I have been given an ancient card clocking-in machine. It, and presumably others around a factory were once controlled by a central master pulse sent twice a minute. Some clever person, before my ownership, designed a pulse sender to fit inside the clock case. The clock works but when the pulse is sent, the mechanism, (a pair of large electromagnets acting on a lever) make a rather loud CADONK!
Here's my question. Can you give me advice on how to make that electromagnet pull-down slower and hence quieter?
I was wondering about a large value capacitor across the coils.
If this idea will not work, I was wondering about using a cam on a stepper motor with a 30-second revolution to push the lever instead of the pulse sender. The engineering for that might be beyond my abilities though.
Many thanks to anybody who replies!
Neil
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