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Nikhil Rane avatar image
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Nikhil Rane asked Nikhil Rane commented

How use multiple crane on same rails

I am using 3 hoist on same rail. I want put constraint that when hoist 1 is moving hoist 2 will wait

when hoist 3 working hoist 1 and 2 will wait


i am attaching model for reference. can you please help

File name (Hoist Simulation)

FlexSim 22.2.1
multiple hoist on same stucture
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1 Answer

Jason Lightfoot avatar image
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Jason Lightfoot answered Nikhil Rane commented

Which has priority ? Should hoist 1 and 2 get out of the way of the job hoist 3 is doing? Should they interrupt their work or will the hoist 3 job wait until they are inactive?


The simplest way will probably be to use a process flow for Hoist3 that creates a task sequence on hoists 1&2 to hold them somewhere while hoist 3 is in operation.

Attached is an example that detects the job Crane3 receives. The creation of task sequences on Cranes 1 and 2 holds them until the task sequence is finished - those sequences could be made to preempt with a higher priority and so interrupt their jobs. Currently it waits until Crane 1 & 2 make themselves available (make the task sequence active).

Hoist Simulation_jl.fsm.pdf


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Jason Lightfoot avatar image Jason Lightfoot ♦♦ commented ·

You could also add travel to loc tasks for crane 1 & 2 to clear the path for Crane 3.

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Nikhil Rane avatar image Nikhil Rane commented ·
Hi Jason,


Thanks for support. in model we 1 and 2 are moving simultaneously. I want to work 1 hoist at time. other 2 should be stopped. I don't the priority for the task

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Jason Lightfoot avatar image Jason Lightfoot ♦♦ Nikhil Rane commented ·
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Nikhil Rane avatar image Nikhil Rane Jason Lightfoot ♦♦ commented ·
Hi Jason, Model is stopping at 16707 sec. I tried not able to figure out why.


would you help?


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