How to make the Transporter go to random connect racks to collect goods?

Question

question

Jia W asked Jan 25 2021 at 9:35 AM Jason Lightfoot commented Feb 05 2021 at 10:33 AM

How to make the Transporter go to random connect racks to collect goods?

Proto.fsm

I wanted to ask if there is a way to make the transporter to collect random amount of good from different racks that are being connected and put it at the queue

Software Version:

FlexSim 20.1.3

flexsim 20.1.3 warehouse

proto.fsm (209.5 KiB)

· 7

Joerg Vogel commented · Jan 25 2021 at 10:00 AM

There is a method called findItem in storage system. It uses SQL clauses. There you can set a RANDOM clause. That will choose randomly from all matching attributes an item to collect it from the system. You need only create a loop in a logic. The repeating steps are randomly which defines the amount.

Or you get an array of all matching items of the system by queryItems. You choose from this array an random amount of items to collect them from the racks.

Each of those items stores the data of rack object, metrics of slot address and location. You can use these to build individual tasksequences.

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Jia W Joerg Vogel commented · Jan 25 2021 at 10:24 AM

May i know where can i find the storage system ? i am very new to this application hence i have no clue on where the settings are at

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Steven Hamoen Jia W commented · Jan 25 2021 at 11:02 AM

@Jia W Or if you mean the storage system object. That can be found in the Toolbox and is automatically created if you drag in a rack

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storagesystem.png (22.5 KiB)

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Answer 1 · 2021-01-25T15:43:57Z

Jason Lightfoot answered Jan 25 2021 at 3:43 PM Jason Lightfoot edited Jan 28 2021 at 3:16 PM

The easiest way is to use a process flow like this:

The assign labels has options for warehousing to allow you to find an item in a slot (slot item) across the whole storage system space - and so you can just choose to ORDER BY RAND() in the sql field.

the other labels are to set a destination and find the actual item to pick up (it's not the same as the storage slot item -even though they represent the same thing ).

I've attached a demonstration to your model.

proto_jl_corrected.fsm

1611589195932.png (13.4 KiB)

1611589305243.png (14.6 KiB)

1611589320835.png (12.6 KiB)

1611846818537.png (14.8 KiB)

1611846933760.png (12.7 KiB)

1611846964634.png (18.6 KiB)

proto-jl-corrected.fsm (217.0 KiB)

· 5

Jia W commented · Jan 27 2021 at 5:47 AM

Alright i will try to make an example and see if it works

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Jia W commented · Jan 27 2021 at 6:10 AM

is there a way to repeat the process ?

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Jia W commented · Jan 27 2021 at 6:49 AM

After testing out the transporter is still not going to random racks to collect the boxes. Is there a way to make the transporter collecting a number of boxes ( e.g. 10 items from random racks before going to queue ) Testing.fsm

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Jason Lightfoot ♦♦ Jia W commented · Jan 27 2021 at 5:28 PM

You've started a new question for this here but don't seem to have used this answer.

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Jia W Jason Lightfoot ♦♦ commented · Jan 28 2021 at 7:38 AM

i've tried to recreate it however it does not collect randomly from the 3 racks that i set from a testing model

Testing.fsm

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testing.fsm (57.1 KiB)

Answer 2 · 2021-01-28T12:08:38Z

Joerg Vogel answered Jan 28 2021 at 12:08 PM Jason Lightfoot commented Feb 05 2021 at 10:33 AM

Ok, there seems to be a mismatch with the clause. Here is the right clause

ORDER BY RAND()

Then there is a problem, that the Process Flow is not relevant for your model at all, because you still use Fixed Resource mechanisms to transport items. I attached a repaired version.

Then there are some upper case and lower case errors in spelling of labels at the token.

And Sometimes it is necessary to let the transport travel to an object, that is holding the slot where the item to carry stays.

Repaired_transport_by_random_item.fsm

repaired-transport-by-random-item.fsm (55.4 KiB)

· 7

Jason Lightfoot ♦♦ commented · Jan 28 2021 at 3:18 PM

Thanks Jorg, not sure from where I picked up the incorrect keyword.

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Jia W commented · Feb 05 2021 at 6:40 AM

Hello i don't get the setting that you have changed perhaps you could attached a picture bellow

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Joerg Vogel Jia W commented · Feb 05 2021 at 7:09 AM

Hi, Jason had done this already in his answer. Second picture: The clause for Query 1 is new.

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Jia W Joerg Vogel commented · Feb 05 2021 at 7:19 AM

so i have to follow the process flow mapping even though i have a fix sources?

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