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David Chan asked David Chan commented

Question on Drive in Racking

Hi I have some questions on the drive in or thru rack object in the FlexSim warehouse module.

1. Increase the number of vertical beam in the y direction with a certain width? Currently when the sy of the rack is increase, the number of vertical beam will increase accordingly with a certain width. Is there a way for user to fix it?

2. How to fix the number of pallets in the y-direction? Is there any possibility by increasing the slot padding to keep a distance between the pallets so that a certain number of pallet on one level in a single bay can be controlled?

3. How to placing the pallets from top down instead bottom up? By default, the pallets are placed bottom up, but this is not the default item placement sequence for drive-in or thru rack. Once the bottom is filled, the forklift cannot go in anymore. Can the Start level with Z- be used for such arrangement? Or is there any way?

Thanks for looking these questions.

Regards

David


FlexSim 21.0.0
flexsim 21.0.0item placementdimensiondrive-in or thru rack
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Joerg Vogel avatar image Joerg Vogel commented ·

Hi David, I suggest you ask only one question per thread. There is a little advice in best practice for using this answers site. It is there on purpose, because you may get answers by some users and then you must decide which one come nearest to accept it. Your questions are related to rack design and slot assignment. Many thanks for considering this hint.

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Joerg Vogel answered David Chan commented

2. “the stacking order is inherent in the nature of the rack type” from Manual Storage Object. This nature defines the number of slot items. You will notice that this limits the number of items per slot.

3. The nature of drive in rack changes the slot assignment already. But if you need to control this on your own there are examples to find slots descending from top to bottom or from back to front. Here my favorite for keywords for the search tool “rack“, “level”

how to stack sequence...

can I query slots...

it took me about 30 minutes to look for these two answers. And the answer is: you use an ORDER BY clause.

1. The design of a rack is driven by number of slots, levels and bays - in this order. It is not anymore a classic 3D fixed resource with sizing cones, where you increase a dimension and the sub nodes resizes relatively. It “is inherent in the nature of the rack” in Warehousing.

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David Chan avatar image David Chan commented ·

@jorg Thanks for your timing to locate the answers and make the comment.

2. I don't quite understand how the stacking order defines the number of slot items. I am trying to control the number of item along the y-direction which can only be limited by the space available and the size of the item, I guess I can play around with the offset size of items so that the space for the number of item can be limited. Not a good and direct method.

3. When I am using the default drive-in rack, the slot assignment is still based on the First slot with Space. Don't it is different from any other rack. I will try to explore using ORDER By. May be another way is change the direction of the For loop from top down?

1. It seems that the number of vertical beam in y-direction is depending on the bay width. If the width is 1 m, the number of vertical beam will increase by 1 for every meter in SY. As you said, it seems that we can't control that. Too bad.

Thanks

David

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