How to transfer lab. to lab.a science package (with full efficiency)?

[oyunbagimlisi]

How to transfer lab. to lab.a science package (with full efficiency)?

Sorry for my bad english, sorry.
Theoretically, the 0.97 stack inserter should be enough to transfer 6 sciences to the other lab. Even though I use 2 stack inserters (1min=60 science), I can't reach the efficiency. I stay at about 54 per minute. I'm failing to transfer the initial distribution lab package content. I couldn't figure out the reason. Can you help please?

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[DaveMcW]

Does it work if you use 7 belts? Adding 3 more on the other side.

[oyunbagimlisi]

Does it work if you use 7 belts? Adding 3 more on the other side.

Maybe it really works. But I expect a theoretically reasonable explanation. Because a single strap should be enough if I'm not miscalculating.

[Zavian]

I look at that setup and I think that the stack inserters transferring between labs are likely to empty the source lab of science packs on a regular basis.

Think about it this way. When the top lab is getting low on red science flasks, the stack inserter will grab a handful of red science flasks from the bottom lab. If it grabs more than a few it is likely to leave the bottom lab empty of red science flasks.

I think the best you are likely to get is to replace the stack inserters moving items between the labs with 2 filter inserters, each with capacity limited to 1, and with each set to transfer 3 different science flasks.

You might also need to replace the stack inserters loading the bottom lab with fast inserters, and possibly upgrade the underground belts to fast or express belts. I suspect that the stack inserters will take too long trying to pick up items from the slow belt and the bottom lab will stall before the inserter can swing.

[oyunbagimlisi]

I look at that setup and I think that the stack inserters transferring between labs are likely to empty the source lab of science packs on a regular basis.

Think about it this way. When the top lab is getting low on red science flasks, the stack inserter will grab a handful of red science flasks from the bottom lab. If it grabs more than a few it is likely to leave the bottom lab empty of red science flasks.

I think the best you are likely to get is to replace the stack inserters moving items between the labs with 2 filter inserters, each with capacity limited to 1, and with each set to transfer 3 different science flasks.

You might also need to replace the stack inserters loading the bottom lab with fast inserters, and possibly upgrade the underground belts to fast or express belts. I suspect that the stack inserters will take too long trying to pick up items from the slow belt and the bottom lab will stall before the inserter can swing.

I think it will work. Thank you both for your interest and help.