90 INCREMENTAL MOVEMENT IN TOP LEVEL ASM

[CAD_Woman]

Hello,

I am trying to setup an indexer to rotate at 90 degree increments for a total of 360 degree. (4 STATIONS)

I have tried the constraints and joints, but obviously I am doing something wrong.

Can someone take a look?

Thank you,

Lorrie

[JDMather]

An assembly must include parts.

Inventor parts are in the form of *.ipt files.

Without the *.ipt files the *.iam file is useless.

[SharkDesign]

Where are you trying to rotate? In the assembly or in studio?

[Gabriel_Watson]

Are you trying to have each station as a model state you can switch to? See attached.

[SBix26]

I'm not sure if this helps or not.  The attached two-part assembly (Inventor 2019 format) uses the rotation-type motion constraint coupled with an angle constraint with a resting position.  As currently set, it has six "rest" positions, but can be very easily modified for any number.

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Sam B
Inventor Pro 2022.2 | Windows 10 Home 21H1
LinkedIn

[CAD_Woman]

Just rotate in the assembly.

Sorry I didn't realize I did not include the sub-components.

[CAD_Woman]

That is a good idea, thank you!
I cannot download files, I think because we are using 2016.

[CAD_Woman]

Thank you for trying.
I cannot download due to us using 2016 (I think).

[SBix26]

Please verify what version of Inventor you're using: click on the drop-down next to the Help question mark and choose About Autodesk Inventor Professional.  What does it say in that box (see sample below)?

I will reproduce my example in the version you're using (if I can).

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Sam B
Inventor Pro 2022.2 | Windows 10 Home 21H1
LinkedIn

[CAD_Woman]

Yes I am using 2016.
Thank you!

[SBix26]

OK, here is the detent example in 2016 format.  This one has four detent positions, but changing that is as simple as editing the Rotation constraint and changing the ratio from 4 to whatever number you wish.

Hope it's useful for you.

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Sam B
Inventor Pro 2022.2 | Windows 10 Home 21H1
LinkedIn

[CAD_Woman]

Thank you for setting that up.
I cannot figure out how you got it to move in the 4 increments.
If I grab it now, it just goes around with no stops.
Rt. click over the Angle constraint to "Drive"? If so, what settings?

[SBix26]

Hmmm.... on my system the ring can only rest in one of four positions.  If you drag it around, does it not jump to the nearest quarter?  It does this because the arrow part is constrained to snap back to zero, and is connected to the ring by a 4:1 rotational constraint.

But perhaps this isn't really addressing what you need.  Can you describe in a bit more detail what you want for your four-position indexer?  If you actually want to simulate the motion of the indexer by driving the input, that will be more complex, probably involving Simulation, which is a bit above my pay grade.  But for just constraining its rest positions while able to drag it from one position to the next, this does the job.

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Sam B
Inventor Pro 2022.2 | Windows 10 Home 21H1
LinkedIn

[CAD_Woman]

I think it may be a software version issue.
I cannot get it to "stop" at the 4-90deg increments. But I will use this information for other setups.
What I need is crazy simple. I am trying to rotate a circular disk around another concentric object in 90 degree increments.
Thank you for trying.

[Gabriel_Watson]

His solution works perfectly. I think you may have been rotating the wrong part (the arrow part can be made invisible, as it is there only to help the functionality).
If you share your assembly with subcomponents (parts) I am sure he would be able to mimic the same constraints and deliver you the finalized work.

[CAD_Woman]

I attached the zip file.

I didn't realize my original file did not contain the sub-components.

Maybe I am simply not "driving" the components properly???

Thank you!

[SBix26]

Here is your indexer assembly revised with the detent function added (2016 format).  I simply added the Detent.ipt part that I used in my sample, and constrained it as I did in the sample.  Again, this allows the indexer to be dragged in its one degree of freedom (rotation), but when let go, will snap to the nearest of four angular positions.  This is because it is coupled (by Rotation constraint) to the Detent part, which will rest in only one angular position.

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Sam B
Inventor Pro 2022.2 | Windows 10 Home 21H1
LinkedIn

[CAD_Woman · Accepted solution]

OK-I got it!
I wasn't snapping to a close 90 degree area.
Now-anyway I can get this to move in the 90 degree increments in a video?
I am trying to show movement seamlessly as it moves to all 4 stations (without me manually moving it)?
I thought that I could achieve this with the drive component???