Change Position of Created Item

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Aldo G11 asked Jul 25, '22 Felix Möhlmann commented Jul 28, '22

Change Position of Created Item

agv-trailer-load-and-unload_1.fsmHello everyone, I'm using a model based on the one posted here (https://answers.flexsim.com/questions/70730/how-can-i-simulate-a-tractor-trailer-in-flexsim.html) which I'm using now; so the question is: how can I change it in a different position for a different shape? I'm using a different shape but appears on the Task Executer like this:

and I want the edited shape to appear on the Task Executer look like this:

In other words; can the position of the axis "y" and "z" be changed from the already existing Process Flow and make every object created from the Process Flow stick to the modified "y" and "z" coordinates?

I looked onto the Custom Code and find out that the marked number changes the position only on the "x" axis, so maybe there's a part of the code that changes "yz"?

Hope you see my question, and thank you in advance...cheers!

Software Version:

FlexSim 22.0.5

agv code axis change

agv-trailer-load-and-unload-1.fsm (1.9 MiB)

1658771410506.png (30.2 KiB)

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Joerg Vogel commented · Jul 26, 2022 at 07:25 AM

A Trailer is following or advancing in front of direction of travel. This is typically an x-coordinate. BUT you can also tell your objects additionally to show up at a different location once it is attached as a trailer. You change the item location values after attaching as a trailer

token.item.as(Object).location.z = 1;

This places your item level of 1 distance unit in relation to your Taskexecuter.

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Joerg Vogel commented · Jul 26, 2022 at 07:34 AM

If you need a trailer, which is following in an offset in normal direction to travel direction, you are changing not only just a location but also a path behavior. Then you should think about a different kinematic approach where you places the shape of your Taskexecuter in relation to your object frame, which looks like your trailer is moving on AGV path and your Taskexecuter shape moves with an offset next to the path.

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Answer 1 · 2022-07-26T08:33:22Z

Felix Möhlmann answered Jul 26, '22 Felix Möhlmann commented Jul 28, '22

In the attached model the custom shape objects aren't attached as trailers but moved into the totes that are serving as trailers.

There are multiple ways to adjust their location (easiest to most complex - in my opinion):

1) Use a 'Change Visual' activity in the process flow to adjust the location after the items are moved into the totes.

agv-trailer-load-and-unload-1_1.fsm

2) Edit the packing method of the tote in the FlowItem Bin, so any entering objects are automatically placed correctly. Essentially using 'object.setLocation()' to do the same adjustment as the activity above.

3) Edit the shape factors so that the visual location of the custom shape relative to its bounding box is chosen in a way that neither of the two options above is necessary.

1658824129032.png (17.0 KiB)

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1658824254102.png (8.5 KiB)

agv-trailer-load-and-unload-1-1.fsm (1.9 MiB)

· 2

Aldo G11 commented · Jul 27, 2022 at 08:50 PM

Thank you for your answer Felix, I succeed to place it on the right place, but now I'm having an issue adding more AGV's, do you know what's the issue here? The TaskExecuters get stuck when they reach the PickupPoints. I'll attach the model...Trailer Tests.fsm

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trailer-tests.fsm (151.2 KiB)

Felix Möhlmann Aldo G11 commented · Jul 28, 2022 at 06:14 AM

While TaskExecuter2 is loading its second item, the item assigned to the third pickup cp is pulled by TaskExecuter1. Due to this, when TE2 finished loading, it doesn't find any more items to load at the current point, so the token moves back to the beginning of the main loop.

Because the pickup points don't have a 'NextLookForWork' connection, the token then gets stuck trying to pull the next cp to travel to.

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1658988813299.png (49.9 KiB)

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