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Help in Mechanism

puzzled
1-Newbie

Help in Mechanism

Details in this pic.I want that extruded portion should rotate the cylinder when it makes contact with it and then carry it in the later motion.Capture.JPG


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8 REPLIES 8

My first guess is to use a slot connection. You will need to model a curve in one part and a point on the other.With a slot connection the point will slide along the curve. You can specify (I think) a coefficient of restitution at the end points of the curve, so that there is some dampening when the point hits the end of the curve. I haven't played around with slot curves in a while, so I'm not sure how this works today.

Shouldn't be one body fixed for slot connection? Here both of them are given pin connection as each of them rotates.

I find it easier to simply mimic the motion with servo motors using specific timelines.

in this case, use a rack and pinion gear connection to a phantom servo motor and then a separate servo motor for the rotary motion.

Not elegant, but certainly achievable.

Yes at very first place i had a thought of using two different servo motors and then time them accordingly. But i thought there has to be some real time way where they contact each other and start rotating. Thanks for your feedback.

Here I made a test with a slot and two rotating parts. Works fine, the model is redundant, so I had some accuracy issues with the wrapped curve representing the slot. This can be overcome with some more detailed modeling...

Video Link : 6164

This one seems good i will try with my model too.Thank you

I didn't manage to create "end stops" for the slot-connection itself. But this should be possible to achieve with max/min values enabled on the joints connecting the shafts. 

Hmm i gave it a try but don't know what's wrong with me.

This is the flow :

1) Cylinder assembled with pin constraint to assembly axis.

2) cylinder handle (green)..given pin connection with assembly axis and slot follower

while rotating both of them rotates i dont know why!!!

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