Solved: Simultaneous Mechanism Motion

Durbal.Andrew.H · ‎Sep 10, 2013

Hi All,

Have a blade assembly where I want to be able to rotate the 6 blades about their own axis at the same time and by the same amount with one motor.

Is this possible or any ideas welcome.

Example attached.

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TomD.inPDX · ‎Sep 10, 2013

I have connected all the blades with gears.

1st I added the rotation constraint to each blade to manage synchronicity.

2nd, I had to reverse several axis rotations; this requires you to edit definition of the assembly constraint "pin" and select the group rather than individual contraints. Now you can flip the axis rotation.

The master "blade" has the axis reversed from the others. This is so they move in the same direction. I opted to drive all 5 blades from the 1st assembled blade.

I did not apply a motor. You don't really need one. But you can make a "dial" or even a "slider" feature to manage the blade angles. See the little meter tutorial. Of course, a relation at this or another level can drive this. Just connect a relation to the rotation feature in 1st blade. Or drive the 1st blade as a motor with any motor profile.

The attached file is Creo 2.0 full version.

View solution in original post

TomD.inPDX · ‎Sep 10, 2013

You can make generic gear connections to the other blades.

TomD.inPDX · ‎Sep 10, 2013

I have connected all the blades with gears.

1st I added the rotation constraint to each blade to manage synchronicity.

2nd, I had to reverse several axis rotations; this requires you to edit definition of the assembly constraint "pin" and select the group rather than individual contraints. Now you can flip the axis rotation.

The master "blade" has the axis reversed from the others. This is so they move in the same direction. I opted to drive all 5 blades from the 1st assembled blade.

I did not apply a motor. You don't really need one. But you can make a "dial" or even a "slider" feature to manage the blade angles. See the little meter tutorial. Of course, a relation at this or another level can drive this. Just connect a relation to the rotation feature in 1st blade. Or drive the 1st blade as a motor with any motor profile.

The attached file is Creo 2.0 full version.

JoshuaHouser · ‎Sep 10, 2013

My eyes get so confused with all the motion, I can't even hardly tell which direction they're moving!

Video Link : 4335

TomD.inPDX · ‎Sep 10, 2013

I know the feeling.. Dragging works to get a good view of it. If you motorize it, you really want to understand how mechanism deals with time. It took me a long time to get a handle on that.

Durbal.Andrew.H · ‎Sep 11, 2013

Cheers Antonius, Perfect. Did not realise the user-defined properties of the gear connection being set to 1 to 1 would do this and flipping the directions of the gear connectors to make them line up.

Does take a little while to get your eyes and head round them moving in the same direction.

TomD.inPDX · ‎Sep 11, 2013

Nice work on the blade by the way. Is that an engineered profile?

If you "unground" the shaft and add a different ground feature (a fixed shaft for instance), you could easily automate a presentation profile by making the hub a motor and one of the blades a motor.