I need to build a series of conveyors (all very long and intertwined), with MDR logic. However, it becomes tricky, when the photoeyes that control the motors are extremely close together. Any suggestions?
These types of conveyor can often be simplified eg by using the stopping and moving space properties of a single long conveyor:
mdrConveyorWithoutPhotoeyes.fsm
If you need to replicate and verify the real control logic then it will be harder and obviously as tricky as it is in reality (or more so).
Thanks Jason! I appreciate the help!
My only question would be... if the items are different sizes, could I enter a variable referencing a table or something similar for the stopping/moving distance? Or how could I approach that?
You can make the spacing independent of the item size or a function of the item size or a combination of the two. The limitation is that you can't base it on the previous item's size which would be useful for some cases.
The model I uploaded behaves like this with variable item sizes (1 metre fixed spacing from the leading edge):
Here's a comparison of two methods - one using the spacing as described above and another using decision points with restricted areas to have the item centres stop 1 metre apart.
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