Originally Posted by brewzofo1
It started to spin for a second then started to jump around and then nothing.
A 2" stir bar is big and going to have trouble getting started. Also, if the fan spins too fast it can throw the bar. I have this same trouble with mine, although the largest bar I have is 1.5"
Even with the Rheostat set to run my fan on the lowest setting is too fast to get it going without throwing the bar.
What I do is hold my beaker about 1/2 inch over the stir plate while the spin gets going. Once it's going I can set the beaker down and it doesn't get thrown. Sometimes it takes a couple of tries.... but I can always get it spinning this way.
I don't know about that 2" bar.... you might want to get a 1" bar. You'll likely have better luck.