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christoph gruber avatar image
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christoph gruber asked Braydn T commented

What´s wrong with my AGV-Template-Model form the Tutorial?

Enclosed you will find my build model from the "Tutorial 4 - Automatic Guided Vehicles / 4.4 - Custom AGV Settings". I do not understand, why the "MainDropOffPoint" does not work correctly. The Waste-Item and the DirtyLaundry-Item does not use the right DropOff-Point!

Thanks for helping to understand.

agv tutorial
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christoph gruber avatar image christoph gruber commented ·

Sorry, I forgot the model.

Here it is.

agv-totorial-gr.fsm

The Waste sometimes takes DropOff4 instead of DropOff3 and the DirtyLaundry sometimes takes DropOff 3 instead of DropOff4.

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agv-totorial-gr.fsm (209.2 KiB)
Christoph G5 avatar image Christoph G5 commented ·

@Joseph Gillespie

please look at my problem here "MainDropOffPoint" doesn´t work correctly.

(see also my repley: https://answers.flexsim.com/questions/71901/whats-wrong-with-my-agv-nextlookforwork-controlpoi.html#answer-72029 )

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Joseph Gillespie avatar image
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Joseph Gillespie answered Braydn T commented

@christoph gruber

Your tutorial model is actually working correctly. What you are encountering here is by design. This is from the AGV Process Flow:

"When an AGV arrives at an LFW point with an item to unload at that location, if the LFW point has DropoffPoints connections, the AGV will find an available dropoff point and travel to that control point to drop off the item, instead of dropping it off right at the LFW point."

When using DropoffPoints, the AGV doesn't travel to the control point nearest to the destination of the item. It simply travels to the first available dropoff point.

If you want the AGVs to travel to a specific Control Point to unload items at a given queue, just connect the queue to that control point, like this:

There's no need use the "MainDropOffPoint" in this case, just connect each queue to its own point. Then just make sure that they are also connected back into the "NextLookForWork" loop with "NextLookForWork" connections.


capture.png (45.4 KiB)
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christoph gruber avatar image christoph gruber commented ·

Thank you very much @Joseph Gillespie

your answer makes work with AGVModul a little bit clearer for me. And your changes makes the tutorialmodel works fine!

But in my opinion it´s wrong described in the tutorial.

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maindropoffpoint.png (104.1 KiB)
Joseph Gillespie avatar image Joseph Gillespie christoph gruber commented ·

@christoph gruber

The instructions in the tutorial are correct. The tutorial teaches how to use DropOffPoints, not how to get the AGVs to unload at the nearest Control Point to each queue. The tutorial sets up the model on purpose so that AGVs can unload items at any of the four points for either WasteRemoval or LoadingDock. You want your model set up differently, so the tutorial instructions you attached don't apply to your model.

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christoph gruber avatar image christoph gruber Joseph Gillespie commented ·

@Joseph Gillespie

Sorry Joseph, my english is not so good. But in Tutorial 4.4 Step 3 at the end is written, see the picture below. So I thought, produced Waste have to transport to the "WasteRemoval" queue and DirtyLaundry have to transport to the "LoadingDock" queue. As well as, the two queues in the unloading dock area have different Pull Strategies (WHERE LoadType == 3 / WHERE LoadType == 4). But maybe I´m wrong!

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