Hello
I created a sprocket assembly to make a lyre on a small lathe, the last pinion will drive the lead screw that will move the nut.
That's my problem, I wouldn't want the nut to turn.
50 Complete assembly. SLDASM (3.5 MB)
Thank you in advance
Have a nice day
No comprendo, the nut? Where is it exactly?
Because I can't/don't know how to make some parts of the assembly appear, top secret defense?
Hello
First of all, when you share an assembly with the take-home composition function, otherwise we have an assembly... empty. (because as in my case, I don't use the toolbox)
To prevent your nut from rotating, simply constrain the vertical or horizontal plane in relation to the plane of the assembly. Parallel constraint can be a good choice.
It is obvious that your nut must also be constrained by a relationship of the Helical or pinion type, depending on what you want.
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Thank you for your answer, but it doesn't work
Hello @jagardette
A small screen print can help anyone who doesn't want to/can't open your assembly.
Next, what is the question. you don't want your nut to turn in the "real" assembly or in the 3D? Because the solution will not be the same (although)
2 Likes
I would have liked to use my 3D plan to check my sprocket and nut stacking
That is to say, by taking the lowest pinion on the lyre by turning it one turn
I will have checked the displacement of the nut which must be 3 mm since this lead screw has a pitch of 3mm and the number of turns of the highest pinion.
But as the nut turns at the same time I can't check anything
Regards
Hello;
As proposed by @FUZ3D , you probably need to add a constraint on your nut (between one of its faces and one of the planes of the assembly ... or a " parallel " stress between one face of the nut and that of your sprocket support...)
→ also check the existing constraints.
Kind regards.
1 Like
In theory, it should actually do it... hoping that the thread in the nut is not a simple representation 
Finally, nice your wheel system. You must have been plentiful to assemble them!!
1 Like
Indeed I had a lot of fun,
When I make a constraint as indicated, my sprockets and the screw no longer rotate
Try to give us your assembly back via the pack and go by including the toolbox 
objects we're looking at this
Here is my mini assembly test (without representation of the teeth)
If I move any element, the others follow.
So I don't see what's wrong with your assembly apart from a bad constraint.
I'm on SW2019, and assembly with internal parts to the assembly.
Sprocket test. SLDASM (445.6 KB)
Thank you again for my sprocket story, I had too many constraints just about anywhere.
The solution of a (parallel) stress between a nut face and an assembly face was the correct one.
Thanks again
How to close this request
Kind regards
You need to select the answer that helped you the most as the "best answer". And there you have it, the subject is considered closed