When I upgraded assembly I to assembly II it lost the ability to make empty cans.

warrenc wrote:

When I upgraded assembly I to assembly II it lost the ability to make empty cans.

正确,设定空罐子,是一,三,五级使用的.
你应该F1看一下配方库
That's correct. Empty cans are set to be used for Tier 1, Tier 3 and Tier 5.
You should press F1 to check the recipe library.

本设计初衷就是扼制机器升级提升产能,必须使用低级或者更高级而不能简单升级就试图增加产能.
你不要试图用2级来生产,因为那时候还是铁时代.
只有你用3级时期,才会认为你进入钢铁时代,
能够使用五级机器,则你配套的铝工业已经完成,这是一整套完善逻辑

The original intention of this design is to curb capacity growth through straightforward machine upgrades. Instead of merely upgrading machines to boost output, you have to deploy either lower-tier or higher-tier equipment.
Do not attempt production with Tier 2 machines, as you will still be in the Iron Age at that stage.
You are only recognized as entering the Steel Age once you utilize Tier 3 machinery.
If Tier 5 machines become accessible, your supporting aluminum industry infrastructure will have been fully established; this forms a complete and coherent logical system.