How to move this in 2014 DS?

[WHolzwarth]

See files, and move the constraint named Drive. I've had some troubles even with constrainig that in Model environment.

But I had no luck at all until now with Dynamic Simulation.

Perhaps only a problem of not enough knowledge.

Walter

[admaiora]

hi walter,

missing  118660-WH.ipt file

[WHolzwarth]

Oh, thanks. Now added.

[admaiora]

Hi Walter,

i don't know the purpose of the mechanism, neither the forces.

You can use planar. cylindrical and slinding cylinder on curve joints.

I am a little concerned for the dimension of the system (very little) that can produce some isue due the little inertia, even with micro mechanism activated.

[WHolzwarth]

Thanks for taking a closer look. At the moment, I don't know, why it's not moving in DS.

I tried to add sliding cylinder vs curve joints without success, I've tried to add "wheels" instead of the cylinders and use rolling cylinder vs curve joints, but no change. I've defined gravity, and still the same.

Purpose is tracing the slider path relative to the armed frame during the movement over the waves. Dimensions are only for testing, not like reality.

[admaiora]

Hi Walter,

i have 2015 here, so tell me if you can open 2015 files.

[WHolzwarth]

Yes, I can.

[admaiora · Accepted solution]

here we go

[WHolzwarth]

You're a real wizard.

I've watched the DS here on my PC for some time, looked at all joints, having been in search for what is driving the whole thing.

I only found out, that no movement occurs, when gravity is suppressed.

But what's changing the direction of movement, and why is it moving to the right, even if I place the starting point more to the left end of the curved surface?

[admaiora]

Hi,

if you suppress the gravity is still moving due the insert force, you will see it.

Why did it go reverse? because the 5 N force it is not enought to gain the gravity in the last curve.

If you will increase the force for example at 100 N  you will see it.

All your doubts are connected with the 5 N force i have inserted, that have module , verse and direction.

[WHolzwarth]

Hmm. I had suppressed the force, and only gravity was active.

Even in this situation, the movement reversed. It's not really transparent for me.

Meanwhile I've added a spatial joint, that drives the movement of the left roller vs the left front plane. It's more obvious.

Thanks once more

Walter

[admaiora]

That is due to the little greater gradient of the right side that "pull down" the part.

Here an exaggerated case.

[WHolzwarth]

Hmm. I think, in your 2nd version the additional force is active. Ok.

But it's tricky. I noticed, that you added two tangent constraints for Part4 vs 22. Suppressing one of them, breaks all other (3) tangent constraints, too.

Ceterum censeo: Some tasks are left, besides MyHome

[admaiora]

Force was set to zero.

Suppressing it would be the same.

You can assemble it in dynamic simulation without constraints, using only Joints, so doesn't matter what assembly constraints did you used if you will not convert them  automatically

[admaiora]

I can t see the specific situation that you are referring.

[WHolzwarth]

Hmm. That's going on here. See attachment (MP4 video).

[admaiora]

Hi Walter.

Yes, tangent4 is complete redundant, i set it twice without noting it.

I can delete it with no problem. You can delete all tangent and apply them again.

[WHolzwarth]

Not here. These tangent constraints get broken again very often.

Perhaps it's a localization issue.