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Pushing MU on non moving line

Experimenter
Experimenter

Hello, 

 

Is there a way to allow for an MU to be pushed forward on a non moving line by the MUs that follow?

9 REPLIES 9

Re: Pushing MU on non moving line

Gears Esteemed Contributor Gears Esteemed Contributor
Gears Esteemed Contributor

Can you describe the problem more in detail?

How can the MU be pushed by the MU that follow?

 

Maybe you could use the entrance control (backwards?) of the line to start the line for the length of one MU. This would be the the behavior of some kind of cumulating gravity conveyor.

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

Re: Pushing MU on non moving line

Experimenter
Experimenter

The situation occurs when there are several line segments (conveyer segments) after each other.

One conveyer segment is running and the follwing conveyer segment is at a stop. 

Products will then slide over or reach over to the stoped conveyer and the following products will do the same and push each other infront of one another. 

This is a typical situation in dairy and other food conveyer systems.

 

 

Re: Pushing MU on non moving line

Gears Esteemed Contributor Gears Esteemed Contributor
Gears Esteemed Contributor

first: nothing is moving on a stopped line. I guess it is a typical animation topic. Statistically you will get a good result, if you do not stop the line (cumulating). The behavior is the same; if the successing station is blocked, the MUs are cumulating on the line. But they are cumulating at the end of the line, not at the start. If you want a "near by" animation, you could stop the line (at the blocked state) after each MU (by setting the speed). It is near by, because also other MUs are moving... See the example. If you want to have a more realistic animation, then you could split the Line in many segments and control each segment...

 

 

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

Re: Pushing MU on non moving line

Valued Contributor
Valued Contributor

If i gather the OP's question correctly, it is only required to set the "MU Distance" to 0 on the conveyor that is to be "stopped" and have its MUs pushed forward by following MUs.

 

I have attached a model with what I think M_Einehag is trying to achieve. Is it correct?

Re: Pushing MU on non moving line

Experimenter
Experimenter

Yes!

Sometimes you make the question more complicated then needed so the simple answer is hard to find.

 

Thank you ET_Boys!

Re: Pushing MU on non moving line

Solution Partner Phenom Solution Partner Phenom
Solution Partner Phenom

Hi M_Einehag,

 

A small remark concenring your issue.

 

The conveyor systems that I am familiar with, may behave in the way you desccribed, with only one small difference. Pallets would indeed gather as you described, but in the end all the pallets would still leave the system.

 

In the Line object you might want to check the "Minimum gap" setting. This will purge all MUs. The behavior that you described will happen if the infeed of pallets is (temporarily) faster than the outflow.

 

Regards,

Gert Nomden


Gert Nomden
Senior Consultant | Tecnomatix Product Manager
cardsplmsolutions.com

Re: Pushing MU on non moving line

Experimenter
Experimenter

Hi Gert,

 

Yes, you are correct. There are situations where the suggested solution will no mimic the reality.

I my partcular case it will likely work out.

 

If you have a solution that would work in more general cases I would still be interested.

 

Best Regards

Martin

Re: Pushing MU on non moving line

Solution Partner Phenom Solution Partner Phenom
Solution Partner Phenom

Hi Martin,

 

The suggested solutions are the simplest. Regarding the described practice: I never understood the advantages of this pallet collection from a logistical perspective. To me it seems like you are just creating local queues and potential problems downstream.

 

Anyway, there are possible refinements. One is to split up the big conveyor into small units and implement the exact behavior. This will take quite a lot of programming, basically mimicking the PLC-control of the real system with its time-outs. The second option is to implement sensors on your Line object and stop MUs for some time (Simtalk: stopped:=true/false) so that you gather a bunch of MUs upstream of the sensor.

 

I think the local situation dictates what you should do. Conveyor systems can be complicated and require lots of traffic management.

 


Gert Nomden
Senior Consultant | Tecnomatix Product Manager
cardsplmsolutions.com

Re: Pushing MU on non moving line

Experimenter
Experimenter
Thanks agin for your suggestions!

BR
Martin