Queue stacking

Hi,

Im having issues trying to stack items neatly in a queue (all on 1 level, long sides touching).

Specifically:

Using setrot in the onentry trigger doesn't seem to rotate the items (??), so i've just rotated the queue 90 degrees. This now creates the problem that the queue is using the longaxis of the box to get the spacing distance. This value also isn't showing up on the productspacing variable in the queue which i thought may be of some use.

I could get around this problem by swapping my x and y dimensions in the original model, but this is part of a much greater project where i don't want to change arould all the other conveyor orientations. i would also like to understand what's going on.

Any comments (or even referencing appropriate documentation) would be appreciated.

Regards

Paul

Paul,

I modified your model to show how to do stacking you want inside the queue. Basically, you do not use the default stacking strategy provided by the queue (Choose "Do Nothing" in the Item Placement). Instead, you write some code in the OnEntry and OnExit triger to explicitly set the pisitions and the rotations of the items inside the queue. Here is the code.

OnEntry:

...
setrot(item,0,0,90);
setloc(item,-ysize(item)*content(current),-xsize(item)/2,0);
...

OnExit:

...
// reset the item positions in the queue when the first item leaves the queue
int numItems=content(current);
for(int i=2;i<=numItems;i++){
    setloc(rank(current,i),-ysize(item)*(i-1),-xsize(item)/2,0);
}
...

I also attached the model.

Please let me know if this solves your problem.

Thanks Alan, thats exactly what i'm after. Wasn't having much success with setrot earlier for some reason.

So presumeably onexit triggers before an item has left the current object (hence only moving content(current)-1 items in the queue)...

Cheers Paul