" I lowered the amps to 7 from 11". I guess that one came out wrong?
Yes, 50Hz is waaaay too low. The spindle specifies what input frequency it should get (400Hz for general purpose and 1000Hz for high Speed spindles are common values)
Are you sure it’s not the drive? Do you know how to test the windings in the motor?
@Paul_Shaw I’m not sure of the cause, but I’m sure of the effect. I didn’t know there was a major problem until the bottom of the spindle spit out a puff of smoke 
and stopped rotating completely. Up until that time it would rotate, just a lot slower than it had before. I figured I didn’t have the amps as high as it was originally set, so I turned up the dial and to my dismay, I saw the spindle smoke and my heart sank. I turned everything off, in hopes that it might not have been destroyed, but I never got any response from the spindle again. My new spindle arrives Thursday.
@Paul_Shaw For reference, how do you test the windings?
@George_Allen A word to the wise. While you’re testing things it is a good idea to monitor what you are testing. This means having meters in circuit monitoring say current and voltage. Some additional information to augment the senses never hurts. At least when you cook stuff you get to fully appreciate everything that was going on then. Though the puff of smoke does sound like one of those memories that lasts a lifetime to me. Still, you could have taken in a bit more of the moment. There are actually machines made with meters built into them. So they can be monitored at all times during operation. So this concept of meters on machines is not completely crazy.
@Paul_Frederick That would be ideal. I’m not sure how to set that up to monitor that. It sounds like an arduino program.
@George_Allen you just hook up meters and watch them.