Conveying flow items after they are moved by kinematics

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Craig DIckson asked Jan 22, '22 Craig DIckson commented Jan 26, '22

Conveying flow items after they are moved by kinematics

Hi. I have a model that moves some flow items in the z axis using kinematics, before depositing them onto a conveyor. But when I move them into the conveyor (the entry transfer to be exact), the flow items do not convey; they just sit in the air above the conveyor for the travel time.

This happens whether or not I apply a Finish kinematics.

What do I need to do to get the flow items back to a "normal" state.

(Background: I am modeling an indexing reciprocating vertical lift mechanism. It moves totes from the bottom to the second level, the second to the third, and the third to the fourth level simultaneously, and all locations are served on every cycle. So I can't really use a normal lift construct. I just figured it would be easier to do in code, showing what is happening using kinematics.)

Software Version:

FlexSim 22.0.0

conveyor kinematics

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Jason Lightfoot ♦♦ commented · Jan 22, 2022 at 01:48 PM

Craig, can you upload your model so we can better see what is going on and how you've implemented this? If needed you can set this question to private.

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Craig DIckson Jason Lightfoot ♦♦ commented · Jan 25, 2022 at 04:56 PM

Kinematics Test.fsm

Jason, here's the simple test model.

Thanks

Craig

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kinematics-test.fsm (44.2 KiB)

Answer 1 · 2022-01-25T18:48:36Z

Jason Lightfoot answered Jan 25, '22 Craig DIckson commented Jan 26, '22

It looks like the Finish Kinematics isn't clearing it's listener couplings from the Queue's predraw. This model does that in code for you.

kinematics-test_jl.fsm

kinematics-test-jl.fsm (44.9 KiB)

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Craig DIckson commented · Jan 26, 2022 at 11:25 PM

Thanks!

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Answer 2 · 2022-01-25T19:15:39Z

Phil BoBo answered Jan 25, '22 Phil BoBo edited Jan 25, '22

In your Finish Kinematics activities, if you put the "Object(s)" field back to its default value of "All Objects", then that activity will delete all the listeners for that kinematics node.

This will fix those kinematics data nodes so that they aren't interfering with the conveyor's kinematics.

1643138185659.png (10.8 KiB)

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Attachments: Up to 12 attachments (including images) can be used with a maximum of 23.8 MiB each and 47.7 MiB total.

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