Pass Station on Conveyor if it is in use

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Raymond F asked Oct 4, '19 Raymond F commented Oct 10, '19

Pass Station on Conveyor if it is in use

station-pass.fsmI am trying to design a conveyor system that has 3 stations. the model runs clock wise but needs to prioritize the stations ordered against flow starting with station 1 first and fill that area to its capacity then station 2 and finally station 3. When the flow item moves to enter station 1, if it is blocked then i would like it to continue on the main run without stopping and loop back around. Currently I am having issues with getting the decision points to do what I am looking for so I have DP1 set to round robin.

Software Version:

FlexSim 19.2.1

conveyor decision point

station-pass.fsm (49.8 KiB)

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Raymond F commented · Oct 08, 2019 at 12:07 PM

Just curious if my question got lost in the mix? Its been a few days.

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Raymond F commented · Oct 08, 2019 at 05:17 PM

@Joseph Gillespie Hi Joseph, Did I do something wrong with this posted question? It hasn't gotten any traction. Maybe you are able to help me out?

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Answer 1 · 2019-10-09T22:08:50Z

Phil BoBo answered Oct 9, '19 Raymond F commented Oct 10, '19

Attached is your model (22657-station-pass-2.fsm) with modifications to do what you describe.

At station 3's decision point, it checks the state of all 3 photoeyes to determine whether to send to station 3. If 1 and 2 are blocked, but 3 is not, then it sends to station 3.

At station 2's decision point, it checks the state of 2 photoeyes to determine whether to send to station 2. If 1 is blocked, but 2 is not, then it sends to station 2.

At station 1's decision point, it checks the state of 1 photoeye to determine whether to send to station 1. If 1 is not blocked, then it sends to station 1.

(I also added an exit conveyor that the stations send to once they have processed the items. You didn't describe how the items leave the system so I just put something simple in. You may need to adjust this logic to fit your situation.)

conveyor-logic.png (216.7 KiB)

22657-station-pass-2.fsm (48.7 KiB)

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Raymond F commented · Oct 10, 2019 at 12:59 PM

station-pass-2.fsm

Thanks for the help @phil.bobo. I really appreciate it. 1 issue is that boxes are entering stations down stream after they have left a station if the downstream station has capacity. I attached the same file but I removed the color command after the IF statement in the decision points. Is there something that can be added to the decision point to force the box, if already processed to the end of the line? I dont want to double process a box.

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station-pass-2.fsm (48.6 KiB)

Phil BoBo ♦♦ Raymond F commented · Oct 10, 2019 at 02:56 PM

Sure. Add a label that signifies that the item has been processed and don't sent it to the station if that label is set.

22762-station-pass-2.fsm

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22762-station-pass-2.fsm (48.9 KiB)

processed-label.png (735.5 KiB)

Raymond F Phil BoBo ♦♦ commented · Oct 10, 2019 at 04:58 PM

This worked out awesome. Thanks a lot for the support.

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