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how to control the traffic between Two near Cross Conveyors?

@Jeff Nordgren

I want to know how to control the traffic between Two near cross conveyors flow.

Zone 1 has one spot to have ONE conveyor between two T cross conveyors. And zone 1 shows good control the flow.

But zone2 can't allow one item between two T cross conveyors. The space is narrow and so the model can't allow it. I want to control the traffic in the zone2.

crossconv-2020-doublepalette.fsm

FlexSim 20.0.0
FlexSim 20.0.0
FlexSim 19.2.4
how to control the traffic between two t cross conveyorstwo t cross conveyor
zone1.png (85.6 KiB)
zone2.png (61.7 KiB)
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Brandon Peterson avatar image
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Brandon Peterson answered David Seo edited

Hi,

In the Zone 1 model you were using two Zones to control the flow (One for each intersection) which allowed for 1 pallet to be between the two intersections. As there is not enough room in the Zone 2 example for a pallet to be between the intersections, you will need to change your model so as to only use one zone. To do this you will need to modify the decision point that is in between the two intersections by removing the "Release Restricted Area" and "Acquire Restricted Area" code from the "On Arrival" trigger. You will also need to modify the code on "DP247" and "DP249" so that they both Acquire the same restricted area as "DP254" and the code on "DP250" so that it releases the same restricted area as "DP255". The only drawback to this approach is that it would limit the number of pallets in the entire area to only 1 pallet.

If you want to still allow two pallets in the area but eliminate the cases where a pallet is sitting in the middle of the intersections, you can do the following. Move the "Release Restricted Area" code on "DP256" (The decision point in between the intersections) from the "On Arrival" trigger to the "On Continue" trigger. You will also want to change the "Item Edge" from "Center" to "Leading Edge".

Hopefully one of these two options will work for you, Brandon

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David Seo avatar image David Seo commented ·

@Brandon Peterson

Thank you for your explanation. Your second description of 'Allowing two pallets in the area but eliminating the case sitting in the middle intersections' is my issue.

I moved the "Release Restricted Area" code on "DP256" (The decision point in between the intersections) from the "On Arrival" trigger to the "On Continue" trigger. And I changed 'Item Edge' from "Center" to "Leading Edge". And in the first time two items move normally but in the second time the left item stop at the DP256 like above.

My real layout is below and the left pallet can't move to right when a pallet exist in the right position and should wait at the self position.

I tried it to various way but failed. The first description of only one item is good.

Please make the finished good model upload.

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not-moving.png (412.4 KiB)
real-layout.png (213.0 KiB)
David Seo avatar image
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David Seo answered

I have solved my issue. @Brandon Peterson. Thank you.

doubletcrossconv-2020.fsm

I upload the example model for anyone to need it.


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