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Helen avatar image
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Helen asked Helen commented

Same combiner for different products

Hello,

I want to you use a combiner to produce a different series of products. I've seen in a tutorial that you can use a global table for that as shown in the model attached.

Combiner_DifferentProducts.fsm

However, in order to do this you need to have a "stable" port 1 because it will always come one part from the first port. How can you do this if you have a production in which you take parts from stocks A+B for product 1 and C+D product 2. In this case, you don't have a port from which parts are always taken.

Thank you,

Helen


FlexSim 22.1.1
combiner
combiner-differentproducts.fsm (40.4 KiB)
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2 Answers

Jason Lightfoot avatar image
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Jason Lightfoot answered Helen commented

Your pallet is serving as the work instruction to produce a given type and the container for the assembled parts - this is a valid technique.

If instead of driving the assembly from a predetermined work order (pallet) you would like to opportunistically assemble parts as they become available, you can use a process flow and a list of parts and have a token for each assembly order try to pull all the parts it needs before moving them to an assembly station (combiner or other). In such a model there would be no need for port connections as you have them in your model.

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Helen avatar image Helen commented ·

Thank you @Jason Lightfoot and @Joerg Vogel.


I created a list named "List_Materials", and I put all the materials available in that list (output port > the list). I also created an array (length 8) in which I state that I want to do 5 first type products (A+B) and 3 second type products (C+D). However, I'm unable to create the token and pull the materials from the list using th process flow that produces the aforementioned sequence. Can you help me with this?

Thank you,Combiner_DifferentProductsAssbly.fsm

Helen

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combiner-differentproductsassbly.fsm (45.4 KiB)
Jason Lightfoot avatar image Jason Lightfoot ♦♦ Helen commented ·

A combiner that assembles, from what is available, into possible products could be useful for many users. I have an example which I intend to post to this site shortly.


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Jason Lightfoot avatar image Jason Lightfoot ♦♦ Helen commented ·
Article here.
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Helen avatar image Helen Jason Lightfoot ♦♦ commented ·

Thank you @Jason Lightfoot,

It seems that is more complicated than expected. I'm trying to understand step by step and some questions arose.

  • You programmed Queue 1 as follows. Output > sent to port: First available and then Triggers On entry: push to parts (being parts a list). Is it the same to do Ouput> push to item list?
  • Why is the element that represents the combiner a Queue? Is there a specific reason for that?
  • Process flow:
    1. Why is it a time-event trigger?

Helen

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Joerg Vogel avatar image
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Joerg Vogel answered Joerg Vogel edited

In this answer you find a different approach to complete an assembly. Therein the code distinguish between different input ports.

For port 1 allow everything to enter by return 1;. Pull Requirement for port 2 gets a matching pattern of your question based on type of first item in current object by a conditional filter if

  • A: then B
  • B: then A
  • C: then D
  • D: then C

a logical equal comparison operator is ==

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