Shared Combiner for two different processes

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question

Rahul T5 asked Jun 10, '23 Felix Möhlmann answered Jun 20, '23

Shared Combiner for two different processes

PressProcess_1.fsm
Hello,
I am trying to simulate shared resources (press and robot) to understand their utilization and system throughput. There are two press operations that combine two parts. I used combiner as a fixed resource. A1 and A2 get pressed together and goes through a process to become B2. B1 and B2 then get pressed together and goes to sink.
I set up two combiners to mimic parallel process and want to set up the model in a way that either PressA or PressB is running -- both cannot run simultaneously. I tried to set OnEntry and OnExit triggers on both presses to close/open input for the other press. But when I run the model I see both the combiners operating simulaneously in prallel. Looking for guidance on correcting the logic.

Software Version:

FlexSim 23.1.1

combiner robot shared resources parallel process

press.png (261.2 KiB)

pressprocess-1.fsm (39.3 KiB)

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Julie Weller commented · Jun 16, 2023 at 01:36 PM

Hi @Rahul T5, was Joerg Vogel'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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Answer 1 · 2023-06-13T06:00:40Z

Felix Möhlmann answered Jun 13, '23

Your original model actually looks correct. But you are using "Press1"/"Press2" in the trigger functions instead of "PressA"/"PressB".

Instead of addressing the other combiner directly you could also draw a centerport-connection between them and use "current.centerObjects[2]" in both cases.

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Rahul T5 commented · Jun 20, 2023 at 03:01 PM

Thank you @Felix Möhlmann !

That worked. How do I accept your comment as an answer?

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Julie Weller Rahul T5 commented · Jun 20, 2023 at 03:10 PM

I can change it to an answer for you that you can accept!

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Answer 2 · 2023-06-10T09:00:04Z

Joerg Vogel answered Jun 10, '23 Julie Weller converted comment to answer Jun 20, '23

It is an exclusive cycle.

On Entry (1), On Setup or On Processfinish -event in PressA close input of PressA

In pressB open On Processfinish or On Entry -event input of pressA.

(1) entry of item with condition port == 2

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Rahul T5 commented · Jun 12, 2023 at 04:19 PM

Hi Joerg,

Sorry, I did not fully understand your comment.I tried the following: Added "OnEntry" trigger to close input of PressA.

Added "OnProcessFinish" trigger to open PressA's input

This stops PressA until part comes back and goes through PressB cycle.

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1686586597384.png (207.6 KiB)

Julie Weller Rahul T5 commented · Jun 12, 2023 at 05:02 PM

@Rahul T5 did doing that end up solving your problem or do you still have issues?

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Rahul T5 Julie Weller commented · Jun 12, 2023 at 05:57 PM

Sorry, should have been explicit. It did not solve the problem and I still have the same issue.

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