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Mike avatar image
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Mike asked Mike commented

Conveyor kinematics doesn't wait till movement finishes to start next activity

Hi,

I have a few problems in this kinematics process flow. The DP1 disappears on first kinematic movement of the conveyor but it still functions. In my actual project model, the decision point doesn't follow when the conveyor makes kinematic movement.

Another problem is that "Wait for finish" function doesn't seem working. Next activity starts before finishing the kinematic movement of the conveyor. Could you please help me check? Thanks a lot.


Conveyor lifter.fsm

FlexSim 23.2.0
conveyorkinematics
conveyor-lifter.fsm (46.6 KiB)
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1 Answer

Felix Möhlmann avatar image
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Felix Möhlmann answered Mike commented

You have to close the input of the Entry Transfer, not of the conveyor itself to block other items from entering. Currently a new item always immediately enters after the last, meaning the second kinematic to move down is never create (the tokens are stuck in the Decide-Delay-loop).

There it might also be smarter to simply wait for the item to exit the conveyor instead of using a fixed delay time.

And finally, to the decision point to move together with the conveyor, you can move both (as well as the transfers) into a plane and move that plane up and down.

conveyor-lifter-fm.fsm


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Mike avatar image Mike commented ·

Thanks, Felix.

May I know why ".up" need to be added? Thanks again.

1692795255178.png

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1692795255178.png (23.6 KiB)
Felix Möhlmann avatar image Felix Möhlmann Mike commented ·
Since the kinematic is now supposed to move the conveyor's parent object (plane) I use ".up" to shift the reference from the conveyor to the node/object it is a subnode of.
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Mike avatar image Mike Felix Möhlmann commented ·
Great. Thanks.
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