Buffer to follow FIFO

Hello community,

I want to model the following behaviour:

  • There are two different parts A and B. The parts are unload from buffer A (Part A) and buffer B (Part B) in lots of 10 parts to buffer C.
  • The parts must be loaded in the NC Machine D one by FIFO (The 10 parts lots that come inside the buffer C in first place must be loaded 1 by one on the machine D) => However once I have parts A and B mixed in the buffer C the unload is not following the FIFO and parts are unloaded one of each every time.

I attach and image with the scenario, a video showing the behaviour and the 3DXML to check it.

Thank you for your support!