Operator working on two machines

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Ramesh Yadav asked Aug 7, '16 Sam Stubbs commented Aug 11, '16

Operator working on two machines

oprtor.fsmThere is a lathe machine, which pulls one part at a time contains the following cycle:

a) Initialize – 2.5 - 4.5 min (uniformly distributed)

b) Machining – 9 - 13 min (uniformly distributed)

c) Cleaning & Removing – 2- 4 min(uniformly distributed)

An operator is needed for cycle 1 and 3, to utilize the operator in his idle time, he is engaged on another single machine which pulls part 2.

Arrival pattern of part 2 is in the following pattern, Inter arrival time – 5-15 min(uniformly distributed)

Lot size – 1

Cycle time of the machine – 1-5 min

How do I use operator in this case.

Thank You.

Software Version:

FlexSim 7.5.4

multiprocessor operator assignment task operator after processing opearator

oprtor.fsm (22.4 KiB)

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gilbert jerald commented · Aug 08, 2016 at 06:57 AM

i have attache a model you refer it i have made some changes on your model to use an operator. i cant clearly understand what you said ,1752-oprtor.fsm even though i made a change what i understand from your said refer it

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1752-oprtor.fsm (23.2 KiB)

Ramesh Yadav gilbert jerald commented · Aug 08, 2016 at 04:29 PM

Thank You Sir

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Answer 1 · 2016-08-08T15:51:59Z

Sam Stubbs answered Aug 8, '16 Sam Stubbs converted comment to answer Aug 11, '16

So you can do the initialize easily, by going into the Processor's properties, and setting up your uniform(2.5,4.5) setup time. Just click the "Use Operators for setup" box and make sure you have an Operator connected to the center port of the Processor.

Getting the Cleaning & Removing time is a little more difficult, since there is no default option for finish times. You can accomplish this by adding a line of code into the task sequence of the operator when loading the item. In the flow tab of the Processor, make sure the "Use Transport" box is selected, then in the dropdown options select "Task Sequence Example_1."

Then click the code button (the little scroll icon near the dropdown menu.) And insert this line of code into the task sequence after the first travel task:

inserttask(ts,TASKTYPE_DELAY,NULL,NULL,uniform(2,4),STATE_UNLOADING);

See image below:

Add this functionality to however many processors you need. I've included an example model below.

operator-setup-finish-example.fsm

processorsetup.png (22.0 KiB)

2016-08-08-09-35-09-processor5-properties.png (25.6 KiB)

insertcode.png (24.2 KiB)

operator-setup-finish-example.fsm (22.9 KiB)

· 3

Ramesh Yadav commented · Aug 08, 2016 at 04:29 PM

Thank You Sir

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Joerg Vogel commented · Aug 11, 2016 at 05:45 AM

@Sam Stubbs that method doesn't lead to a right statistic inside the processor and falsifies another state, too, which belongs to the loading state or waiting for transport state.

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Sam Stubbs ♦ Joerg Vogel commented · Aug 11, 2016 at 03:04 PM

I just set the state as Unloading as arbitrary, he can set whatever states he needs to... This was just to show how the effect can be done.

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Answer 2 · 2016-08-11T05:36:55Z

Joerg Vogel answered Aug 11, '16 Sam Stubbs commented Aug 11, '16

You can build a fake object representing your lathe machine. Inside of this container you place two machines right behind in the flow. When the first machine receive an item, it closes the input. When the item leaves the second machine, the input of the first machine is opened again. You can choose which state needs an operator.

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Joerg Vogel commented · Aug 11, 2016 at 05:20 AM

Use a Multiprocessor instead. You can choose which processes need an Operator.

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