Re: [CAD_CAM_EDM_DRO] Re: I need some feedback on using wire rope for driving...

And it's still a friction drive.
And it still depends on the varying "wire diameter" behaviour of the rope under tensile stress.
And you just added another variable with the threadform, if its root radius is smaller than the wire bundle maximum effective radius.
And the carriage still has no clue where it is.
If you get everything nicely calibrated and only apply tiny cut forces, it will work amazingly well. Bump up the cut forces and ... what's my name? ... where are my car keys?

Mark Bingham
markb@...
http://www.fourth-axis.com/z-gauge/



turbulatordude <dave_mucha@...> wrote:

>
>
> I must be missing something here. The diameter of the screw

would have some

> effect on the travel per revolution of the screw but the distance

traveled

> would be controlled by the pitch of the thread.

The thread has zero effect on the movement. the entire distance is
strictly and only a function of the diameter of the shaft (threaded
rod) and the diameter of the wire.

one diameter of the wire and the diameter of the shaft.

a 1 inch diameter shaft will have a circumference of pi or 3.14159
inches.

the center of the wire on the shaft would be one half of the wire
diameter for the incomming and outgoing, so it is equal to one wire
diameter.

the pitch of the thread is strictly and only used for seperation of
the wire so it does not rub itself and does not slip or jump over
itself.

Dave






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