How do I copy a sheet to a new workbook in Excel without establishing the links to the original sheet? Right now, my code is Sheets("Sheet1").Copy. But that establishes links back to my source workbook. I just want the values. I know I could use select all of the cells I want to...
I have taken care of the immediate problem, by recommending we change the fan and rotor system to shift it's natural frequency to something other than 60Hz. I still don't know what is exciting the torsional resonance at 60Hz, but is it possible that it could be the second harmonic of the...
Thanks for all the information and ideas. I used an accelerometer to measure the velocity of vibration. I will be checking my source with the scope in the next few days to make sure the positive and negative half cycles are equal.
My real problem is audible noise caused by the 60Hz...
I have a small fractional HP 4-pole AC motor that is direct driving a 14" 3-blade fan. I measured the torsional natural frequency of the fan and rotor only and found a natural frequency at 60Hz. The resonance condition is audiable when the motor and fan are running at 60Hz and if I vari...
