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EK avatar image
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EK asked Felix Möhlmann commented

Configure shuttle for multi-deep ASRS

Hi,

I am trying to recreate a scenario I saw on Youtube as below. The storage is multi-deep and the task executor has a platform to extend to store/ retrieve items while travelling up and down in a straight line. I thought that network nodes for the straight line with "travel offset for load/ unload task" to extend into the multi-deep storage would be the right settings but it is not. Can you please advise? Thank you!

PS: The default ASRS vehicle is not suitable for my simulation as I am trying to simulate a 4-way ASRS shuttle system.

Multi-deep shuttle racking system.fsm asrs-shuttle-reach-into-multi-deep-storage.jpeg

FlexSim 23.0.11
shuttle rack
asrs-shuttle-reach-into-multi-deep-storage.jpeg (69.3 KiB)
multi-deep-shuttle-racking-system.fsm (40.2 KiB)
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Felix Möhlmann avatar image
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Felix Möhlmann answered Felix Möhlmann commented

A travel network is probably not going to work too well here, since you need to have a location per bay.

I'd suggest to use either Pick/Place Offset tasks, Travel to Location tasks or kinematics to travel the needed distance along the three axes in succession.

The attached model demonstrates the first two.

multi-deep-shuttle-racking-system_1.fsm


multi-deep-shuttle-racking-system-1.fsm (49.1 KiB)
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EK avatar image EK commented ·

Hi Felix, thanks for the model! In my simulation, the TE should only travel X and Y axis, using an elevator to travel the Z axis, is that still possible using the process flow Pick/Place Offset tasks, Travel to Location tasks?

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Felix Möhlmann avatar image Felix Möhlmann EK commented ·
Sure, the Process Flow in that case would be:

Check if item is on different level. If yes, travel to elevator, move TE into elevator and have elevator move to target height (Travel to Location task).

The the TE travels the x- and y-offset.

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EK avatar image EK Felix Möhlmann commented ·

Multi-deep shuttle racking system_process flow.fsm

@Felix Möhlmann

Hi Felix, I have attempted to create a process flow based on your instructions but I need some support. I couldn't find many elevator process flow in the forum to refer to. I have done my best in adapting the code that you gave.

What I am trying to achieve is:
1. TE travel Z axis only through elevators
2. TE travel only in the aisle between the multi-deep storage on X axis and Y axis
3. TE needs to travel in Y axis to retrieve item from the slot in multi-deep storage

My concerns with using process flow is that I am unable to activate the advanced AGV template to such as parking zone & next work point etc as those are dependent on AGV control points on an AGV network


I have completed the entire Tutorial 4 - Automatic Guided Vehicles (AGVs) but once I replace the connecting queues to a floor storage instead, I couldn't figure out a way pick correctly from multi-deep storage. I have referred to the AGV network offset travel documentation but concluded it as not relevant as I did not want to set scattered pick-up points that the flow item stage outside of the racking.

PS: Can you also advise why the grids of the floor storage is not showing up?


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