Modeling Problem Concerning Next Work Point

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chia725 asked Jul 8, '23 Natalie White commented Jul 12, '23

Modeling Problem Concerning Next Work Point

Hello, I build a model with next work point branches. I have asked a similar question about the next work point. The suggestion is that the next work will find the place to load and unload the item as the machine run through the CP that is in the loop.

I’ve encountered 3 problems for my model now:

When AGV pass the control point it will not implement the unload task to the processor. There are two processors that the AGV will implement the unload process, but the thing is that it will not pick up the finished product and send it to the sink (the output of both the processor and sink are 0).
Why some of the AGV will stay at the pickup point for so long instead of sending resource to the processor.
When I use 2021 version to run the model for a while, it will show the error below. I’m not sure how to fix this problem. But when I use 2023 version to run the model, there’s no such issue. So I am wondering could it be the problem of the version I used?

my model: 0708.fsm

Hope to get some suggestions, thank you!!!

Software Version:

FlexSim 21.2.4

item agv load version

1688800418226.jpeg (35.4 KiB)

0708.fsm (173.5 KiB)

· 1

Natalie White commented · Jul 12, 2023 at 02:28 PM

Hi @chia725, was Jason Lightfoot'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 · 2023-07-08T10:35:06Z

Jason Lightfoot answered Jul 8, '23

Change your AGV system draw scale to 100 so you can see what's going on.

I really advice to reconsider the scaling of this whole model - what are you meant to be modelling - are the process sites really 2km in dimension? Are the AGVs really 1.5km in length but travel at 1metre per second? If so maybe you should be using a GIS map and navigator.

If you read the error message it tells you exactly why you have a deadlock. The two control points in question are far apart but due to you scaling appear to be almost colocated here:

TE4 an TE5 are located at each of those two control points and they want to swap positions. They appear to be at the same position due to the scaling of your model, but actually they are 18 metres apart. A simple solution you can try is to make the paths one-way. You could also try introducing area restrictions so that only one AGV can be in the vicinity of those two control points at a time, or just use one control point for both processors.

Again, please reconsider your model scaling and the units used throughout your model - it does not seem correct.

1688812199779.png (91.1 KiB)

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