Factorio Forums

hi, i'm trying to make an auto mall that will store and craft item you'll need, one of the most important part of it is knowing how many item to give to the crafter, and i'm using an arithmetic combinator to multiple the number of item needed to craft an item by the number of item that need to get crafted, by the combinator is refusing to work, one signal comes from green and oen signal from red, if i select both red and green at once it just multiply them by themselves, i'd like only the green numbers to be multiplied by the red numbers but after setting it up in a way that should work the combinator doesn't give an output signal

With EACH, you multiply only red belts (on green) with red belts (on red), gears (on green) with gears (on red), and yellow belts (on green) with yello belts (on red).
Which results in:
red belts: 0 * 400 = 0
gears: 5 * 0 = 0
yellow belts: 1 * 0 = 0

If you want to multiply all gears and yellow belts with 400 from the red belts, you have to first cast the red belt signal (which is probably changing if your automall decides to craft something else) to some known signal, for example N, and with a second combinator calculate EACH * N.

don't worry, there's a memory cell keeping information, thanks for the info i think i can easily fix it now