Welding machine has insane (4k+) amount of recipes but almost all of them can be crafted using crafting table or not needed at all making this machine quite useless. Also it costs much energy and time. So probably dense machine casing and reinforced machine casing should be craftable only using welding machine. I know that rotor can be crafted a bit more cheaper in this machine but it’s doesn’t matter.
In my expirience I only used this machine once when i was needed mixed alloy ingots from IC2. Also it’s quite strange that i craft reactor core casing using only wrench and banch of dense plates. 
3 Likes
I think they’re intended to make it easier to automate
3 Likes
I think they’re intended to make it easier to automate
Exactly this.
2 Likes