mezman
Well-Known Member
So I'm going though the home stir plate assembly that everyone seems to do. I took the magnets out of an old hard drive and got two strong magnets. I have a 120mm fan that I mounted them on (stuck together). But the stir bar always gets thrown. I think I centered the magnets well, the fan doesn't vibrate wildly or anything.
I think that the problem stems from the magnets grabbing the stir bar at one end only and swing it around the bottom of the flask like a wrestler with a guy in a helicopter move. I figured that the north and south poles of the magnets on the fan would grab the south and north poles of the stir bar and center the stir bar over the magnet. That's not happening in my case.
So my question to you with stir plates, does the stir bar center itself over the magnet or align itself off center?
If your stir bars self align, do you think my problem is my stir bar or the magnets?
I think that the problem stems from the magnets grabbing the stir bar at one end only and swing it around the bottom of the flask like a wrestler with a guy in a helicopter move. I figured that the north and south poles of the magnets on the fan would grab the south and north poles of the stir bar and center the stir bar over the magnet. That's not happening in my case.
So my question to you with stir plates, does the stir bar center itself over the magnet or align itself off center?
If your stir bars self align, do you think my problem is my stir bar or the magnets?