Halcro, great info and thanks for sharing. What you have mentioned has left me scratching my head and always learning.
I know "D" is a little occupied presently but hop he will be able to assist adding to this.
What Tony has mentioned above is another perspective but in referrence to out of round pulley or platter doesn't make any sense to me in relation to yours specially reading what you have experienced.
You have three motors so why not do what I had mention earlier in one of my previous threads.
Place one motor off to the left using your thread and then place another motor off to the right using a separate thread attached but only have one motor working, this will do what Dover mentions above acting as a flywheel and balancing the platter.
When I had my AC3 and spun the platter with no pulley attached it would revolve many times but did slow down fairly quickly but with my Black Knight it's appears to be totally different. Spins allot easier initially and keeps spinning consistantly for a lot longer time prior to actual slowing down, to me this was very interesting in a positive way.
I know "D" is a little occupied presently but hop he will be able to assist adding to this.
What Tony has mentioned above is another perspective but in referrence to out of round pulley or platter doesn't make any sense to me in relation to yours specially reading what you have experienced.
You have three motors so why not do what I had mention earlier in one of my previous threads.
Place one motor off to the left using your thread and then place another motor off to the right using a separate thread attached but only have one motor working, this will do what Dover mentions above acting as a flywheel and balancing the platter.
When I had my AC3 and spun the platter with no pulley attached it would revolve many times but did slow down fairly quickly but with my Black Knight it's appears to be totally different. Spins allot easier initially and keeps spinning consistantly for a lot longer time prior to actual slowing down, to me this was very interesting in a positive way.