Assembly in two steps with PickAndPlace

[PlantSimStudent]

Hello everyone,

I have a rather simple question, which I still coulnd`t find an answer for:

How can I realise an assembly in a specific order so that after the main part enters the assemby station first part A gets into the station (while part B can´t enter the station) and then when the main part and part A are in the station part B can enter.

Thanks!

[Steffen_B]

the assemblyStation will wait for all parts in the assemblyList und move them to the station, after this the ProcTime starts. If you want to have a step-by-step assembly process, you could combine two AssemblyStations e.g. in a sub-frame.

[PlantSimStudent]

I was trying to avoid using a sub-frame since that causes the material flow to get stuck when uing a pick-and-place robot. When using a normal assembly station I can make the robot stay at the assembly station so that this problem doesn't occure, but when using a network it seems to not work.

Is there a way to make the modell work with using a sub-frame?

(I have attached an example file.)

[simulator]

@ Is there a way to make the modell work with using a sub-frame?

Yes (s.b. & attachment)

Please check the links to the frame and the assembly station parameters in your model.

[PlantSimStudent]

Thanks for that suggestion. Unfortunately the problem is a bit more complex: The PickAndPlace that is connected to the two conveyors is handling the main part, that part A and parts B get assembled to.

(As explanation what is happening in reality: The PickAndPlace2 takes the main part from the conveyor and puts it into a assembly fixture, the PickAndPlace assembles part A, the PickAndPlace1 assembles part B and finally PickAndPlace2 takes the main part again an puts it back onto the conveyor system.)

Without using a sub-frame it's possible to make the third PickAnd Place to wait at the assembly station until something comes back. (Using the method:
if @.destination = XXXX then
  PickAndPlace2.setDestination( @.destination, true );
 else
  PickAndPlace2.setDestination( @.destination, false );
 end;
 
 print PickAndPlace2.getDestination;
))

But when using a sub-frame in order to realise an assembly of part A and part B in two seperate steps, this above mentioned method obviously doesn't work any more.

Maybe this is a bit too complex to model and I shoud just leave it as one assembly station, without using an sub-frame for a two step assembly. My hope was that there is a way to block the entrance of part B until part A is assembled. That indeed wouldn't be an accurate representation of reality, but at least consider the fact that part B cannot be assembled before part A.

[simulator · Accepted solution]

it is not too complex for plant simulation.

[PlantSimStudent]

Thanks! Even though that doesn't handle the assembly in two seperate steps at least it controlls the assembly order.

[simulator]

adding  another assembly station or increasing the CT  shoudn't be a problem for you