I was rough turning a piece of wood, it was a log cut into fourths, and I accidentally started the lathe at 1600 RPM, it started rocking back and fourth and then I turned it off. I turned it on again and tried to quickly turn the speed down (I know I should of removed the wood, I didn't think of it at the time), and the speed wouldn't go down. I took off the back of it to look into how it works and see if I could figure out what is wrong. It has 2 pulleys, each made of two parts. The bottom pulley, which is connected to the motor has is allowed to expand by turning the speed control knob which moves the yolk away from it. It forces it to contract by the yolk pushing the pulleys together. The top pulley is also cut into two parts and uses a spring to allow it to come apart or push together to tension the belt. I think one of the pulleys are jammed, or the spring is now tensioned super hard, preventing it from allowing movement.