Conveyor saturation

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question

ORNELLA S asked Dec 20 2018 at 4:17 PM ORNELLA S commented Dec 27 2018 at 3:06 PM

Conveyor saturation

Good morning, everyone,
I have to determine when my conveyor is saturated according to the different scenarios.
Which dashboards were used to obtain this information?
Thank you in advance for your answers

Sincerely,

Software Version:

FlexSim 18.2.2

Software Version:

FlexSim 18.1.1

conveyor time unknown variable

· 1

Answer 1 · 2018-12-21T13:08:24Z

ORNELLA S answered Dec 21 2018 at 1:08 PM ORNELLA S commented Dec 27 2018 at 3:06 PM

Hello,

Here's what I did, I would like to simulate the following situation:
I saturate my conveyors to the maximum in how long does it take for the first pallet of the first conveyor to move?
Know the occupancy rate of the different conveyors
How do I get the trolleys to wait until the conveyors are full?
Run the red and yellow pallets randomly over the multiprocessor?

Best regard

passerelle-simulation.fsm

passerelle-simulation.fsm (166.2 KiB)

· 10

Clair A commented · Dec 25 2018 at 11:05 AM

how long does it take for the first pallet of the first conveyor to move?

Please be more precise: which conveyor in your model is the 1st conveyor: "Convoyeur Eckes 1" ? "Conveyor1" ?

Know the occupancy rate of the different conveyors

You can use a Statistics Collector as shown in the attached sample model 2018-12-25-conveyor-fill-percent.fsm

How do I get the trolleys to wait until the conveyors are full?

What do you mean by trolleys: the elevators ? the forklift ?

Run the red and yellow pallets randomly over the multiprocessor?

On your MultiProcessor, activate the Pull Strategy and define the input ports randomly by percentage:

0 ·

2018-12-25-conveyor-fill-percent.fsm (34.3 KiB)

conveyor-fill-percent.png (66.7 KiB)

pull-strategy.png (8.4 KiB)

ORNELLA S commented · Dec 26 2018 at 10:25 AM

passerelle-simulation.fsm

This the new version with some dashboard

I want to know how can't a stop differents sources when the percent is 100?

The first conveyor is mezzanine 2 and by trolley i mean the the forklift

Thank you in advance

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passerelle-simulation.fsm (73.2 KiB)

Clair A ORNELLA S commented · Dec 26 2018 at 1:30 PM

I want to know how can't a stop differents sources when the percent is 100?

I don't understand this question at all. If you are not fluent in English, you can send your question in French at support@flexsim.fr.

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ORNELLA S Clair A commented · Dec 26 2018 at 1:57 PM

I would just like to know how to stop item creation by source when the conveyor is full.

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ORNELLA S commented · Dec 26 2018 at 4:17 PM

Thank you very much, I would like to use two different photoeyes? one to stop the sources and the other to make them start.

passerelle-simulation-1.fsm

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passerelle-simulation-1.fsm (78.2 KiB)

Clair A ORNELLA S commented · Dec 27 2018 at 11:03 AM

I advice you to practice on the last sample model I shared with you:

add a second photo eye
in the event-triggered source of the second block of logic, sample the second photo eye instead of the first one

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ORNELLA S Clair A commented · Dec 27 2018 at 1:04 PM

THis what i do, the simulation stop at 0 AM

passerelle-simulation.fsm

Please help me!

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passerelle-simulation.fsm (78.1 KiB)

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Answer 2 · 2018-12-21T05:38:56Z

Matt Long answered Dec 21 2018 at 5:38 AM

The WIP (Work In Progress) dashboard charts will allow you to track how many flowitems are on a conveyor. If you use the Composite WIP, you can specify an Entrance Object and an Exit Object. The chart will then track all of the flowitems between these two objects.

wip.png (51.2 KiB)

Answer 3 · 2018-12-22T20:45:30Z

Jason Lightfoot answered Dec 22 2018 at 8:45 PM

Percentage used capacity (saturation level)

For legacy conveyors use

100*getvarnum(conv,"filledlength")/getvarnum(conv,"conveyorlength")

For new conveyors use:

double itemlengths=0;
for (int n=content(conv);n>0;n--)
itemlengths+=conv.subnodes[n].as(Object).size.x;
return 100*itemlengths/getvarnum(conv,"length");

Answer 4 · 2018-12-21T09:25:57Z

Clair A answered Dec 21 2018 at 9:25 AM ORNELLA S commented Dec 21 2018 at 2:36 PM

In addition to Matt's answer, you could also use a PhotoEye with a blocking time to track when the conveyor is saturated.

See the attached example 2018-12-21-photoeye-saturation.fsm.

photoeye.png (68.7 KiB)

2018-12-21-photoeye-saturation.fsm (34.5 KiB)

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