One conveyor feeding two: strange sideways movements at transfer

[clairekruppGhafari]

[ FlexSim 22.1.2 ]

Yet another weird problem at transfers! Here I have one upstream conveyor feeding two down stream depending on the y-position of the package. The logic works fine but there are these weird back and forth sideways moves as the package transfers.

Any ideas?

side_movements_at_transfer.fsm (same model as previous question uploaded earlier)

[jonah_kendellR47TC]

I was able to get a smooth transition by including two extra-short conveyors that were tilted just slightly (0.1 in x-direction) towards the incoming conveyor.

side-movements-at-transfer_JK.fsm

[clairekruppGhafari]

Thanks @Jonah K that does smooth it out, but then it moves many of the packages too far over the edge of the downstream conveyors, which I think is a worse problem! (I know I can fix it but that would require yet another DP and translate command. I'm trying to minimize extra commands as this model will ultimately be huge and probably slow!)

Do you have any idea what is causing the movement - seems to me it starts to move the package towards the center of the downstream conveyor, but then looks at it's Y-position on the upstream conveyor and adjusts to match. This gives a good final position, just jerky movements.

[joerg_vogel_HsH · Accepted solution]

what we see is a standard action. An item is entering a conveyor centered. Smooth transition over time or distance correlates location of previous to following conveyor. But in the middle of this action items are centered in relation to the transfer object. In such a scenario I would switch of smooth transition and prepare items in exiting conveyor by translation to locate correct in relation to entering conveyor. Entering conveyor places items in no time directly to there final location. Items are jumping to there location. Because they are leaving previously correct translated, the transition will look correct in higher run speeds.

[clairekruppGhafari]

Thanks for the explanation @Joerg Vogel . That makes sense. I will play around with the transfer settings to see if I can make it a little less obvious!