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The_Line avatar image
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The_Line asked Jeanette F commented

Racking and Floor Storage Fill/Transport Problem

FlexSim_Original_Racking_1.fsm

Hello,

I am trying to get a transport(forklift) to take pallets from the que and load them on to the racks that I assigned it through the paint slot feature. My problem is that the pallets only fill to a certain amount and then the transport stops or the pallets continuously lay next to eachother even if the rack ends. When I use boxes instead of pallets it works a little better, but still not completely. In the attached model I have everything using the red label as a test.

FlexSim 24.1.0
rack storagetransportersload unload pallets
flexsim-original-racking-1.fsm (236.3 KiB)
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Jeanette F avatar image Jeanette F ♦♦ commented ·

Hi @The_Line, was Felix Möhlmann's answer helpful? If so, please click the "Accept" button at the bottom of their answer. Or if you still have questions, add a comment and we'll continue the conversation.

If we haven't heard back from you within 3 business days we'll auto-accept an answer, but you can always comment back to reopen your question.

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1 Answer

Felix Möhlmann avatar image
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Felix Möhlmann answered Felix Möhlmann commented

- You currently generate items with a product label between 1 and 101, because you use the random number stream of the source as the upper limit in the "duniform()" distribution.

- All racks are set to only pull items with a product type of 1 in their Pull Requirement. If you want to match the slots based on the labels this should be the default "Pull Items Successfully Assigned To Slot". Since this option is not available in the dropdown (for some reason), you can copy the needed code from a newly added rack.

1711611506386.png

- All rack slots are also painted with a value of 1 for the "product" label.

- Some of the racks have a nonsensical Slot Stacking Order set (like X+ > X-, items can't be stacked in both the positive and negative x direction).


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The_Line avatar image The_Line commented ·

Hi Felix, I appreciate your help. I first fixed the slot stacking order set. I then copied the code like you said. Once assigning that to all storage spots I painted the racks with different colors. When I run the simulation, it runs to the first floor storage and stops, I attached the file again. I appreciate any help.FlexSim_Original_Racking_1.fsm

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flexsim-original-racking-1.fsm (248.1 KiB)
Felix Möhlmann avatar image Felix Möhlmann The_Line commented ·

The code was supposed to be copied into the Pull Requirement, not the Slot Assignment Strategy. When I tried to fix your model, the slot stacking order would still behave weirdly. Something might have broken internally in the model due to some invalid settings.

Maybe try starting with a fresh model.

slot-by-label.fsm

Note: The default slot size of a floor storage (1m x 1m) is too small for the pallet object at default size (1.25m x 1.25m).

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slot-by-label.fsm (42.3 KiB)
The_Line avatar image The_Line Felix Möhlmann commented ·

Retry_Flexsim_Original.fsmHi Felix, sorry for the late reply. I created a new model with new racks and adjusted the sizes. It works, kind of but I am still having an issue with the pallets overfilling the rack. For example, the large rack will fill the lowest level, the next level up, and the top shelf skipping the third shelf. It will then let two or more pallets hang off the edge. 1712357305964.png

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1712357305964.png (187.5 KiB)
retry-flexsim-original.fsm (43.2 KiB)
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