The magnet is to induce the pivoting point, to keep the pendulum swinging. Which is a fraud in its self. as it can alter momentum of swing. Hence timing of rotation. Try & obtain a grant to study other reasoning & conclusion, in regards to a Foucault pendulum & just see for your self the hostility you will receive as your shown the door.
Sorry Charles, but your meaningless claim about "inducing the pivot point" is at odds with your fellow flat earther Vauxhall, who posted this diagram:
vauxhall's explanation relies on the magnets being located in the floor under the pendulum's path, which obviously doesn't have any effect on the suspension point of the pendulum. It also doesn't explain how non-ferrous bobs would be affected, as they're obviously non-magnetic. And as a side note, this example points up one of the major weaknesses with the flat earth hypothesis: None of the flat earthers can agree on any of their science. Unlike we round earthers who agree unanimously on round earth science, the flat earthers' claims often directly contradict each other.
Your other claim that "twisting" of the suspension cord has long been dismissed. Most high school science experiments use a heavy gauge mono-filament fishing line, which doesn't twist. Even if we use wire rope, any induced twist after manufacture will disappear once the wire reaches a state of equilibrium, and in any event such a "twisting" motion—if any—would only last for a matter of minutes. It'd certainly not be continuous. If it were, then we would've solved the perpetual motion question LOL.
And finally
Charles, I have no need to apply for a "grant" to study the Foucault pendulum. Thousands of scientists have already provided reams of data illustrating how it works over the past 150 years. Can I suggest
you employ a scientist to disprove the theory, and then get back to us with empirical evidence supporting
your claims that it doesn't work precisely as theorised by round earthers.