topic Re: How to make the operator takes random the products? in FlexSim Forum

How to make the operator takes random the products?

mathilde_dousset — Tue, 04 Oct 2016 07:35:48 GMT

[ FlexSim 16.0.1 ]

I have a production line of engine :

There are 19 several engines : (one queue has one palet of 8 engines)

The operator takes the engine to bring to the conveyor, but he finishes to unload the palet before go to an other palet (other type of engine).

In reality, the operator takes an engine in terms of the command (he sees on his laptop) ,so for example,he takes one engine 7300 then one enfine 6300 and one engine 7100...

How to make it?

Thank you!

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simusequencage.fsm

Re: How to make the operator takes random the products?

joerg_vogel_HsH — Tue, 04 Oct 2016 11:14:25 GMT

At the moment you can control this by opening and closing the output of the separators.Currently there is only one single Tansport Tasksequence dispatched in your model in this section. Another approach is to enhance the actual amount of dispatched tasksequences for transport. Therefore you set the value of "Max Transports in Transit" to a higher value. Suitable is a value that allows products of at least 3 separators being in transit together. If a pallet contains 8 engines, the value should be at last 17.

Then you can decide or change the order of the tasksequences in the tasksequencequeue of the Dispatcher21. For example you can change the Priority of the tasksequence.

Re: How to make the operator takes random the products?

mathilde_dousset — Wed, 05 Oct 2016 12:15:52 GMT

If I change this value , I give a order of priority for the separator but not for only pallet?

I would like my operator take one engine in the separator 66; then one engine in the separator 68...

Is it possible?

Thank you!

Re: How to make the operator takes random the products?

joerg_vogel_HsH — Wed, 05 Oct 2016 17:23:30 GMT

Maybe I haven't got the right order you wish. In the attached model the Dispatcher21 set a descending priority to stored tasksequences if the tested loadstation divers to previous tested loadstation of the tasksequence in the tasksequencequeue. That way gets only one tasksequence of the bunch of tasksequences that have the same loadstation a higher priority. When all higher priority tasksequences are transfered to the operator then the OnResourceAvailable Trigger of the Dispatcher21 starts a new round to give higher priorities again.

Re: How to make the operator takes random the products?

joerg_vogel_HsH — Wed, 05 Oct 2016 17:25:48 GMT

The model depends on a higher rate of tasksquences in transit. I have set the value of Max Transports in Transit to 24.

Re: How to make the operator takes random the products?

joerg_vogel_HsH — Wed, 05 Oct 2016 17:32:52 GMT

if you need a defined order of separators to let the operator load from, then you can set this order in an treenodearray and check the tested tasksequences in the tasksequencequeue with the array. If an array field fitts to the tested tasksequence and the tasksequence has got an higher priority the next filed of the array is tested,

Re: How to make the operator takes random the products?

mathilde_dousset — Thu, 06 Oct 2016 13:06:44 GMT

Yes, it's good but how to make if I didn't have a dispatcher because I have take off it.

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esszai-simusequencage.fsm

Re: How to make the operator takes random the products?

joerg_vogel_HsH — Thu, 06 Oct 2016 13:40:00 GMT

I woud suggest a Pull Strategy in the EntryTransfer741. Saddly the standard approach behaves a bit strange. If I activate Pull and choose Round Robin if Available for the Pull Strategy, the first Pull from a Separator works well, but then the pulling stops at all, although the other Separators contain several pallets with engines. Can someone verify my problem? Thanks.

Re: How to make the operator takes random the products?

mathilde_dousset — Fri, 07 Oct 2016 13:21:53 GMT

Is it possible to put a dispacher without operator ?

Re: How to make the operator takes random the products?

joerg_vogel_HsH — Fri, 07 Oct 2016 17:28:51 GMT

No, that doesn't make sense. But you can add an operator to the dispatcher and the model . If you switch off the offset travel by setting "Do not travel for load/unload tasks" in the properties of the operator. He stands still and you haven't any additional time consumption.

Re: How to make the operator takes random the products?

mathilde_dousset — Mon, 10 Oct 2016 06:41:08 GMT

And can I lead the engine to the conveyor without dispatcher?

I would like that the engine went random to the conveyor.

Thank you!

Re: How to make the operator takes random the products?

joerg_vogel_HsH — Mon, 10 Oct 2016 07:12:45 GMT

Then you can open and close the output of the separators by source code as said in my first answer.

Re: How to make the operator takes random the products?

mathilde_dousset — Mon, 10 Oct 2016 07:14:48 GMT

You will say connect or disconnect the port ?

Re: How to make the operator takes random the products?

joerg_vogel_HsH — Mon, 10 Oct 2016 08:20:30 GMT

@Mathilde DOUSSET Because the EntryTransfer hasn't got the standard triggers I have to use a separate object to control the Output of in the Inobjects of the conveyor. The logic bases on receiving and sending messages in this controller object. A simple variant just opens randomly the output of one of the queues. In the attached model I guess an inobject and its current content. If there is a content then the output will be opened. Otherwise I choose randomly several times over the inobjects. At the end I choose the inobject of my first guess, if there hasn't been found a suitable inobject.

Re: How to make the operator takes random the products?

mathilde_dousset — Mon, 10 Oct 2016 09:16:27 GMT

Ok, but now , any engine went to the conveyor...

I join you my model.

simusequencage.fsm

Re: How to make the operator takes random the products?

mathilde_dousset — Mon, 10 Oct 2016 09:43:01 GMT

It's good!

But I added the "Basic FR" and it don't change my problem...

Re: How to make the operator takes random the products?

joerg_vogel_HsH — Mon, 10 Oct 2016 14:29:47 GMT

@Mathilde DOUSSET 2939-simusequencage-jv.fsm I have edit the OnExit-triggers of the Separators to send messages to the BasicFR. This way the Output is closed by the BasicFR if a message with msgparam(1) and value 3 is received. Those messages are sent only if there is an exit over port 2. The first message is delayed by 130 on reset. There is a chance that a separator is opening its output and has got a content. too.

Re: How to make the operator takes random the products?

mathilde_dousset — Tue, 11 Oct 2016 06:47:21 GMT

@Jörg Vogel Yes it's very good but why the engine didn't go to the conveyor before about 400 s?

Thank you!

Re: How to make the operator takes random the products?

mathilde_dousset — Tue, 11 Oct 2016 07:40:49 GMT

@Jörg Vogel

Excuse me but what is the port 2? Why the value 3?

Re: How to make the operator takes random the products?

joerg_vogel_HsH — Tue, 11 Oct 2016 12:03:43 GMT

Port 2 is the connection to the EntryTransfer in the separators. In the OnMessage Trigger of the BasicFR the switch statement need a case other than the default. I have chosen simply 3. In this way I have the ability to use 1 and 2 for other purposes.