topic Batch in queue with process flow. in FlexSim Forum

Batch in queue with process flow.

kari_payton — Fri, 15 Dec 2017 20:07:04 GMT

[ FlexSim 17.2.3 ]

In my model I have a forklift taking trash to a big scrap zone. I want the forklift to collect all items in the trash can (queue) and transport. However I'm having trouble implementing the logic.

I am trying to batch incoming items in the queue and send it to a list so the forklift knows what bins need emptying. Is it possible to batch objects created in process flow into a queue in 3D?

I also tried having the forklift request 100 items of scrap and only require 1 item. However it's only pulling 1 item and leaving the other 4 on the list, for example.

Re: Batch in queue with process flow.

Jacob_Gillespie — Fri, 15 Dec 2017 21:20:10 GMT

Here is a small sample model I made. I made it request 100 items but only require 1. The tricky thing is you can't pass an array into the load and unload activities.

batchforklift.fsm

Re: Batch in queue with process flow.

kari_payton — Mon, 18 Dec 2017 20:52:12 GMT

Thanks Jacob!

Re: Batch in queue with process flow.

jason_merschat1 — Wed, 17 Jan 2018 00:24:27 GMT

Hi @Jacob Gillespie

This line is very interesting token.i == 1 ? token.pulled : token.pulled[token.i]

Can you explain what this is doing please?

Thanks, Jason

Re: Batch in queue with process flow.

joerg_vogel_HsH — Wed, 17 Jan 2018 05:14:40 GMT

it is the short structure of the statement if (logical condition) true instruction else false instruction.

logical condition ? true instruction : false instruction

Re: Batch in queue with process flow.

Jacob_Gillespie — Wed, 17 Jan 2018 17:17:30 GMT

When you pass an array into the load or unload activity then only the first element of the array is used. So if the index (token.i) is 1 then I made it use token.pulled.

I did it this way because token.pulled is not an array if only one thing was pulled and so token.pulled[token.i] would throw an exception in this case.

Re: Batch in queue with process flow.

philboboADSK — Wed, 17 Jan 2018 22:34:24 GMT

This is known as the ternary operator.

I'm not sure why it isn't documented in the user manual.