Guest
Greetings All,
I have a digital clock that's at least 25 years old. I also have a
machine shop that uses a rotary phase converter to supply 3 phase
power to the machines, some of which are CNC. The clock is in my house
which is on the same property as my shop. Whenever I use certain CNC
machines the clock at home gains time. The shop and the house are both
fed power from the same pole xfmr. I think that the digital clock must
use the 60 HZ ac voltage for the time-keeping reference. And I think
that there must be harmonics or something similar coming from the CNC
machines that the clock is unable to filter out and that is why the
clock runs fast when the machines are running. Am I on the right
track? No other clocks in the house run fast and I'm not going to try
to fix the old clock, I just want to know what's going on.
Thanks,
Eric
I have a digital clock that's at least 25 years old. I also have a
machine shop that uses a rotary phase converter to supply 3 phase
power to the machines, some of which are CNC. The clock is in my house
which is on the same property as my shop. Whenever I use certain CNC
machines the clock at home gains time. The shop and the house are both
fed power from the same pole xfmr. I think that the digital clock must
use the 60 HZ ac voltage for the time-keeping reference. And I think
that there must be harmonics or something similar coming from the CNC
machines that the clock is unable to filter out and that is why the
clock runs fast when the machines are running. Am I on the right
track? No other clocks in the house run fast and I'm not going to try
to fix the old clock, I just want to know what's going on.
Thanks,
Eric