Stationary Ball Screw

[ptjw7uk]

Did a search last night and skf are selling a rotating ball screw arrangement, not cheap I bet
http://www.skf.com/portal/skf_us/hom...ntentId=290063
I also recall that someone did a mill conversion to the z-axis where they rotated the ball nut, although I am not sure what the advantage would be in that case.

Peter

[John S]

Very similar to what the lasers are using today but the Bystronics have the nut inside the servo motor rotor making it a very compact arrangement gives it's a large ball screw and a 7HP motor.

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