30 per minute utility science pack factory, made and tested for version 0.17.10.
I tried to keep it somewhat compact while making it cheap. There is some free space in the middle where you can fit a roboport.
The assemblers can be upgraded, but belts and inserters will need to be upgraded as well.
Requires only resources that can't be produced in assemblers:
- Copper plate: 1495/min (40 steel furnaces)
- Iron plate: 1000/min (27 steel furnaces) (including the resources for the steel plates)
- Plastic bar: 230/min (2 chemical plants)
- Steel plate: 80/min (11 steel furnaces)
- Battery: 20/min (2 chemical plants)
- Sulfuric acid: 500/min (1 chemical plant)
- Lubricant: 150/min (1 chemical plant)