Inserter to deliver a specific amount

[JanusViborg]

Hey there.
I want to send e.g. precise 10 parts from one chest to another. In between chests are belt. I found the solution for the receiving smart inserter to stop when the amount is reached. How do I make the transmitting smart inserter stop after transmitting the precise 10 units?
This is just for trying, to see if it could work, so I want to avoid logistic robots which I know can solve my challenge. Any ideas?
By the way I have no mods installed.
Thank You in advantage.

[Koub]

You can use combinators to count the items the sender ... sends.

[mooklepticon]

You can use combinators to count the items the sender ... sends.

41245531[1].jpg (82.83 KiB) Viewed 4961 times

[JanusViborg]

@Koub.
Thank You for Your answer. How do i do that? The smart inserter doesn't send informations to be counted as far as I know. I've tried to control the inserter with a timer and then count the bits set to allow the inserter to move. Here I never found out to reset both the timer and the counter.
Can You please give me a little hint here?
Thank You in advance

[bo6]

I'm not koub but I think I have a setup that does what you're looking for.

factoriopic1.png (293.39 KiB) Viewed 4783 times

In this setup a counter keeps track of how many times an item is removed from a chest. The smart inserter only takes items out when the number of items removed is less than 9.

It uses a pulse generator to detect when an item is put into or removed from the smart chest. Since it's only interested in items being removed there's a filter to ignore the signal when things are added to the chest.

There's an arithmetic combinator in the filter to invert the negative signal, but its redundant if you're moving things onto belts like here; it's only useful if you're moving things from chest to chest.

Here's a screenshot of it taking 10 items out of the chest:

factoriopic3.png (255.64 KiB) Viewed 4783 times

[Commander Keen]

Hi bo6. That's great!
How do I have to setup the Combinators?

[JanusViborg]

Hi Guys.
This is so cool
As soon as I have the time, I will try to build this and see if I can make it work. I will report back with the result.
Thank you to everybody.
Janus

[bo6]

Sorry for the delay, I got caught up on a few things. Here's a diagram of what each of those combinators does

counterfilterlogic.png (43.8 KiB) Viewed 4630 times

[JanusViborg]

Hi again Bo6.
I'm sorry if I sound stupid, but it doesn't work in my game.
If I make the configuration from Your drawing the output from the pulse generator in total will allways be 0. Since the input in the decider combinator in the filter has to be less than 0 nothing will ever be send out from the decider combinator in the filter.

Factorio_setup_01.jpg (111.92 KiB) Viewed 4576 times

Can I again persuade You to explain?

Thank You in advance

Janus

[bo6]

No problem! I've had my own issues when I tried to pick up combinators.

That's actually GopherAtl's pulse generator design that they posted here: viewtopic.php?f=18&t=14556. But it's buried down pretty far in their post.

In this design the top decider is basically a follower component since chest inventories will never be negative (I guess it can be replaced with an arithmetic combinator for a more general use). It sends its output to the arithmetic combinator which cancels its input signal. There's a delay for the signal to be go through the arithmetic combinator, so the setup generates a nonzero output for a tick.

So if we were adding something to the chest the combinator outputs would look like:

Decider1.png (19.93 KiB) Viewed 4535 times

And for removing something from a chest:

Decider2.png (19.61 KiB) Viewed 4535 times

The generator you made looks like it should be fine, did you double check the filter to make sure it's working properly?

[JanusViborg]

Hi Bo6.
Now my setup works!
If there isn't anything which You can't explain or refer to. Your explaination makes completely sence.
The problem in my setup was the configuration between the counter and the inserter. When the counter was set to x<9 and the inserter was set to x<9 the inserter contunied for ever.
When I changed the configuration of the inserter to be x<8 it worked and took out 9 as defined in the counter.
So in your setup and explaination you counted in 10 pieces. In my i counted in 9... My mistake.
Now i will really start constructing a factory.

Thank You very much for Your help.
I hope it's okay if I contact you if I have questions from which I can't find an answer to in here own my own.

Regards
Janus

[bo6]

Nice, I'm glad it works now. I think I forgot to mention originally that the counter needs to have a maximum higher than the inserter count, oops. No problem, and of course; I'll try by best though since I'm still learning in Factorio too.