Hold pallets until loaded?

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question

Lukas Buchta asked Jul 12, '21 Eric M edited Jul 22, '21

Hold pallets until loaded?

The operator on the begginig of conveyor loads item on custom pallet (token.tote). I need that:

1) conveyor to stops 3 pallets in row

2) Operator loads those 3 pallets

3) pallets (one up to all 3) leave and move to the workstations on side, if there is some stations available. If any station isn't available, it holds and wait.

I tried to implement it in my processflow for load. Then tried to implement it with decision point, but if fails. Can you give any hint please? :)

Also struggeling how to send those empty pallets (token.tote) back to the beggining of the conveyor in group by 3 pallets. They always go in group.

Thank you

yama_autosave.fsm

Software Version:

FlexSim 21.1.4

conveyor move tokens together

yama-autosave.fsm (4.1 MiB)

Answer 1 · 2021-07-12T05:57:22Z

Patryk answered Jul 12, '21 Eric M edited Jul 22, '21

You can use "batch". This block enables the creation of a product batch.

In "batch quantity", you set how many "pallets" you want to batch. Then in the "Tokens to release" set how many "tokens" do you release.

In attached I send you the model.

yama-autosave_5.fsm

1626069342973.png (22.4 KiB)

yama-autosave-5.fsm (4.1 MiB)

· 4

Lukas Buchta commented · Jul 12, 2021 at 10:51 AM

Thank you @Patryk How to make it, that the pallets stop until the batch is full 3/3? Now, when I send only 1 pallet, batch relase 1 token and the pallet continues.

thank you.

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Patryk commented · Jul 12, 2021 at 12:50 PM

You can add new logic. "if the pallet isn't loaded stop pallet at the decision point if else do nothing".

In attached I send the model

yama-autosave-5_1.fsm

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1626094124311.png (17.7 KiB)

1626094144068.png (178.6 KiB)

yama-autosave-5-1.fsm (4.1 MiB)

Lukas Buchta commented · Jul 15, 2021 at 11:06 AM

Everything works when pallets arrive in the same time (0,0,0) But in case, when pallets arrive in different time (0,20,30) the pallet stop on the conditional decide (correct), than it gets loaded by operators but after all pallets in batch are loaded, it doesen't continue anymore on conveyor. Condition: token.tote.subnodes.length==0

I am thinking, after the token drops to stop pallet, how does it drop to sink? It might be the bug?

Thank you very much, I am struggling days and your hints help me very much.

yama14_autosave.fsm

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yama14-autosave.fsm (4.0 MiB)

Eric M Lukas Buchta commented · Jul 22, 2021 at 10:51 PM

It looks like your pallets get stopped twice meaning there would need to be 2 Resume pallet activities to cancel them out. I just removed the "Stop Pallet" code of the main process flow block and it seemed to fix things.

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