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How to program a tool change

Builder
Builder

Hi All

I have a little problem...

 

In my model there are four types of parts, when another part (batch) has to be processed a tool change is performed on several machines, and the duration time is different for each one. When changeover time finishes, the production starts again.


Is there anyone in the forum who has done something similar? 

 

or what is the easy way to program this kind of process?

 

Regards

8 REPLIES 8

Re: How to program a tool change

Gears Esteemed Contributor Gears Esteemed Contributor
Gears Esteemed Contributor
you could set a setup time in the machine (see the different types of setup-times), if the name of the MU changes, the setup will be triggered - the easiest way
Steffen Bangsow
freelance simulation specialist  
web: www.bangsow.eu
mail: steffen@bangsow.net

Re: How to program a tool change

Valued Contributor
Valued Contributor

Hello Charly1,

         There is an example attached by plant simulation , I think you can use this method.

Re: How to program a tool change

Builder
Builder
thanks for your reply Mr.Steffen

I set a set-up depending on MU name and it works in this sense... but it is not feasible for my process.
In the real system, the setup time for several machines (tool change) starts when the last piece of a batch leaves the last operation.

But If I use a setup time when a different MU enters, the setup changes on the first operation and the last piece of the previous batch still does not leave the line.

Do you have some idea how can I perform this task?


regards

Re: How to program a tool change

Builder
Builder
hank you, Erie for your reply

I saw your example but doesn't work for my problem
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Re: How to program a tool change

Gears Esteemed Contributor Gears Esteemed Contributor
Gears Esteemed Contributor
do you have a time gap between the lots?

The easiest way to trigger the setup is to move a part of the new lot to the machine, but you can also trigger the setup by programming. Have a look at the method setUpFor...
Than you need to recognize the end of the lot, in the exit control rear, you can trigger the setup for the next lot.
Steffen Bangsow
freelance simulation specialist  
web: www.bangsow.eu
mail: steffen@bangsow.net

Re: How to program a tool change

Builder
Builder

Thank you so much, Mr. Steffen

 

It works your information, and I found an example of setup at Lot Change in your book

 

I have another question, and I would like to know your opinion about it...

 

Is it possible to perform an optimization of a Setup at lot change with plant simulation?

Re: How to program a tool change

Gears Esteemed Contributor Gears Esteemed Contributor
Gears Esteemed Contributor

there are at least two ways:

 

- try to reduce the number of setups by changing the size/order of setups (different creation tables for your lots)

- try to reduce the total setup time (create a matrix of setup times - from product x - to  product y) --> setup time type matrix --> use the genetic algorithm to check different variants of the creation table of the source

Steffen Bangsow
freelance simulation specialist  
web: www.bangsow.eu
mail: steffen@bangsow.net

Re: How to program a tool change

Builder
Builder

Thank you so much, Mr. Steffen, for your reply 

 

I solved the problem with the lot change using the method setUpFor.

 

I have not work with the genetic algorithms, but I will review your book to understand how does it work...