question

Patrick Zweekhorst avatar image
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Patrick Zweekhorst asked Patrick Zweekhorst commented

Conveyor items move through each other in curve

Hi All,

When you have a curve in a conveyor system it is possible that the items move through each other. As you can see in the example below:

It is of course possible to add some spacing, but on the straight conveyors I do want the items to move directly behind each other. Is there an other way to model this situation correct? Or can the conveyor code be changed such that this situation will work correct?

Thanks in advance,

Patrick

(The model: example2.fsm )

FlexSim 18.0.1
conveyoritems
example2.png (247.7 KiB)
example2.fsm (28.2 KiB)
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Joerg Vogel avatar image
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Joerg Vogel answered Patrick Zweekhorst commented

You have to change the Conveyor Type for the curved section. The speed must be slightly a bit higher than on the straight conveyor type and you have to set a acceleration and deceleration value to create the gap. If you get still an intersection you can adjust speed and acceleration values. You can transfer the acceleration into a short straight conveyor previous the curved section. Then the gap is already in the queue when the items entering the curved section.

no-intersection-on-curved-conveyor.fsm


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Joerg Vogel avatar image Joerg Vogel commented ·

The dirty method is to change the shape size of the flowitem and its content in x direction. A photo eye on entry decreases the shape size and on exit the size is restored.

item.attrs.offsetsx.value=0.9; // restored value = 1

If you seek to implement this, the item must contain the nodes of the shape dimensions. In the Flowitem Bin open the properties of the item, general tab, and press once the Edit button on the field Shape Factors

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Patrick Zweekhorst avatar image Patrick Zweekhorst commented ·

Hi @Jörg Vogel

Thank you for these two suggestions. I will make a second conveyor type and increase the item spacing on that type.

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