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Conveying parts in Line Simulation Mode

Experimenter
Experimenter

Hi all,

 

I case of a study, i need to convey parts on a conveyor using CEE Simulation.
To do that, I created a conveyor by defining conceptual conveyor and conveyable part.
At the beginning of my conveyor i have a photoelectric sensor that detects the part and puts the conveyor on Start mode.

 

The problem is :
My part moves with a flow operation to the sensor (conveyor beginning).
The sensor detects the parts. Its signal becomes TRUE and Conveyor.Start becomes True too.
Yet the parts does not moves along the conveyor (the flow operation is repeating).

 

How to force the conveyor to grip the part and transports it to the end of the motion path ?

 

Thank you for your help !

Maxime

17 REPLIES

Re: Conveying parts in Line Simulation Mode

Siemens Legend Siemens Legend
Siemens Legend

Hi MDS

 

 

Can you make sure that: 

 

1. The Flow op should stop before you make the conveyor grip the part, otherwise you have two nodes (flow op and conveyor) both trying to transport your part which might cause problems. I would give the conveyor a short delay in it's startup so the Op flow can end.

2. Load the "Attachment" column in the Object tree  and look at it during simulation. Does your part become attached to the conveyor at any point during simulation? If not - check if your conveyor is not defined as skid conveyor by mistake and also try to increase the tolerances to see if it resolves your issue. If it does, you need to align the conveying frame and curve better perhaps. 

 

Kind regards,
Gal Snir

Re: Conveying parts in Line Simulation Mode

Experimenter
Experimenter

Hi Gal_Snir,

 

First of all thank you for your answer.

 

1. The Part flox Op stops at the same point then the beginning frame of the conveyor path. Should it be a problem ?

 

2. The appearance part is not attached to the conveyor during the simulation.

The conveyor is correctly defined as conceptual conveyor and the part is on contact with the conveyor (so the tolerance is correct).

 

I verified in Standard Mode that the conveyor and attached part are correctly simulated (I place the part and the beginning point and use Conveyor jog).

 

Best,

 

Maxime

Re: Conveying parts in Line Simulation Mode

Siemens Legend Siemens Legend
Siemens Legend
Hi

When you create a conveyor you automatically get a signal named _position.
If your conveyor is started and running this signal should constantly increment upwards and you can see that in the simulation panel.
Is your conveyor running during simulation?


---
Kind regards,
Gal
Kind regards,
Gal Snir

Re: Conveying parts in Line Simulation Mode

Siemens Phenom Siemens Phenom
Siemens Phenom

Hi,

 

In Line Simulation Mode, right mouse click on the operation that creates your part/appearance.

Select the part/appearance. Now run "Define conveyable Part" and here select the conveying frame.

This conveying frame needs to have contact to the movingSurface of the conveyor.

 

Patrick

Re: Conveying parts in Line Simulation Mode

Experimenter
Experimenter

Hi,

 

Thank you for your answers.

 

It seemes thats the problem was my Part Flow Op. In fact the appearance appears, moves to the beginning of the conveyor and then dissappears and re-appears at the beginning of the Part Flow Op.

 

I added an Non Sim operation after the Part Flow OP. in order to force the appearance to stay at the end point.

Then the conveyor takes the parts and works fine

 

Maxime

Re: Conveying parts in Line Simulation Mode

Creator
Creator

Hi MDS

 

I have the same problem you had, il line-simulation, during the conveyor progress, the part doesn't appear.

I tried to add a no-sim op but the part appear only for the time of this last operation and it didn't go ahead with the conveyor. How did you connect the no-sim op with coveyor? and how this looks in sequence editor?

 

Thanks

GG

Re: Conveying parts in Line Simulation Mode

Siemens Phenom Siemens Phenom
Siemens Phenom

For the material-flow, the process in the Gantt-chart is just relevant to execute your operations in the right order.

But the Material-Flow-Viewer and it's operations and connections, define which operations are relevant for the appearances itself.

 

You need at least 3 operations. (It works with only two, but PS limits the amount of appearances to 5 in this case).

 

1. Start with the operation that generates the part.

2. Have an arrow to any operation that follows in the process. Should be executet as early as possible, or right after the first operation.

3. end with the operation that has to kill the part its execution

 

In newer versions (14.0.1+) you could set the transition to 3.) to "false" and use an LB containing one of the "DestroyAppearance"-functions.

 

Regards

Re: Conveying parts in Line Simulation Mode

Creator
Creator

I'll try to explain what I have done, I have a scene with a part and the coveyor and I want just to try how the conveyor works.

I created 2 no sim ops and associated the part with both ops. After that i linked, in the sequence editor, the ops, one after the other. In the material flow viewer I created the arrow (connection) from first op to the second. In the LB of the conveyor, as connected start signal, I put the end signal of the first op. When I start the simulation the part appear only during the op duration and it doesn't move along the conveyor.

What's the problem and how can I made the simulation?

 

many thanks

GG

Re: Conveying parts in Line Simulation Mode

Siemens Phenom Siemens Phenom
Siemens Phenom

"only" for the op duration? If this means the part disappears afterwards, then it's the desired behavior.

The parts reference is transfered from one operation in the material-flow-viewer to the next, once they are executed.

If you have two operations, the part gets killed after executing the second.

To avoid this: set its transition to "false".

 

If the part stays, but doesn't move on the conveyor:

1. check if part is defined as conveyable part (button: "define as conveyable part")

2. check if your conveyor really moves (check start sig is set and it has a speed defined)

3. check if, when the part is generated, the part's ancor-frame (defined in 1.) touches the "movingSurface"