How to deflect (and decide on this) a flowitem exactly at a conveyor junction

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question

David Besson asked Nov 16 2016 at 9:46 AM David Besson answered Nov 17 2016 at 10:00 AM

How to deflect (and decide on this) a flowitem exactly at a conveyor junction

I need to process a flowitem exactly at the junction of a conveyor. Then, depending on the process result, the flowitem will continue on the main conveyor, or will go to the conveyor spike.

This logic (here: 100% to the spike) should produce this result (but with the second spike connected):

But it seems that when the leading edge of the flowitem had passed the center of the side transfer, this flowitem cannot be diverted to the first spike:

Am I doing wrong? How could I fix that?

Note: This related post is similar, but does not answer to my question: Link

q-conveyor-junction.fsm

Software Version:

FlexSim 16.2.2

conveyor

q-conveyor-junction.fsm (19.2 KiB)

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Answer 1 · 2016-11-17T10:00:34Z

David Besson answered Nov 17 2016 at 10:00 AM

I found a solution (whew!):

1): Have a first DP upstream of the branch which sends 100% of the flowitems to the branch.

2): Have a second DP at the point of the first branch which resends x% of the flowitems to the main conveyor. On this DP, the flowitems are stopped to be processed and then the decision to resend or not the flowitems is made.

In this way, it is possible to make the decision AT the point of the branch: It seems that reddirecting a flowitem (when it is at the point of the branch) to ultimately continue on the current conveyor works, while redirecting a flowitem to ultimately change conveyor is not possible.

q-conveyor-junction-2.fsm

capture3.png (49.0 KiB)

q-conveyor-junction-2.fsm (21.6 KiB)

Answer 2 · 2016-11-16T17:24:46Z

Sam Stubbs answered Nov 16 2016 at 5:24 PM David Besson commented Nov 17 2016 at 8:44 AM

You do need to make sure the decision is made before the edge of the item is past the branch it is supposed to be directed down. If you NEED to have the visual of the box stopping AT the point of the first branch, one option would be to have another DP prior to that point that actually controls the decision logic, and then have the delay on the point that is adjacent to the branch.

I've included a model to demonstrate.

3766-q-conveyor-junction.fsm

3766-q-conveyor-junction.fsm (20.7 KiB)

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