Mating two threads

This can be done, but you have to really want to. You will need to model the threads on your screw with a helical sweep. In the nut, you don't need the threads. Instead, make a sketch with a point located in the middle of the thread flank. Mate this point to the helical face on the screw. Once the nut is mated to prevent rotation, it should move along the screw when the screw is turned.

This model will take a long time to rebuild because of the helical sweep. You may not even be able to make the helical sweep long enough without running into problems. Different versions of SW have been more or less capable with this, so you'll have to try and see. If you don't need to show the helical threads in the solid, you might try using a helical surface instead. The surface should rebuild faster.

If you don't really need the rotate/screw action, you can just slide the leadscrew in and out and the movable jaw would go with it. If you are really good, you could rotate and slide at the proper ratio and make it appear to thread itself through.

WT

Regards, Scott

Thanks to all of you!

It wasn't so hard after all.

BR, Joni

Contructing true threads may be a nightmare for performance. You could mate a point on a jaw with an helix curve on the vise. But I found a better solution for SW2004. First create a dummie part made only by a sketch with a circle and a point on its circumference. Bigger the circle diameter, better the simulation. Put your dummie part in your assembly and mate coincident the point on the circle with a face of the jaw. Add a gear mate between the leading screw and the dummie part. The gear ratio controls the speed of the jaw. Hide the dummie part. For better simulation add a tangent mate between the circle on the dummie part and the cilindrical surface of the screw. Rotating the screw causes the jaw to move along the screw axis. P. Comand