Stepper torque vs ball screws

[Chuck Pickering]

If I use ball screws, can I get by with lower torque steppers vs driving allthread screws?

Chuck

[Tom M]

This is a very interesting question. That  can make me very late for work.  If everything  was exactly equal than ball screws are more efficient.  Are the leads on the threads exactly alike.   Starts?...  I have a mpcnc with thread rod on the z that's annoying me.  I m thinking about swapping to a ball screw for a bunch of reasons... There are a bunch of factors that play  against each other weather I need a nema 17 or a 34.  Yikes.... Gotta go.

On May 8, 2017 6:06 AM, "Chuck Pickering" <chu...@comcast.net> wrote:

If I use ball screws, can I get by with lower torque steppers vs driving allthread screws?

Chuck

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[Chuck Pickering]

Thanks, Tom. Please don't be late for work because of me...

I have found some info on CNCzone that explains quite a bit about ballscrews.

Chuck 

[Bart Dring]

In general, a lead screw is going to be a lot more efficient.

Pay attention to the RPM of the motor in your design. Steppers lose power quickly with RPM.  Most will fall to almost half power over 400 RPM.  If you are targeting a certain mm/minute make sure the RPM is not too high.