I would be interested if there's such a machine that cobble is provided and dismantled by itself?
Yes. But it's a bit more difficult. You can either build a device that regularly ignites and ejects TNT, or you can use a wither. Take a look on Youtube. There are videos that introduce something like that.
In any case, the safest option is the TNT variant.
Does everything have to be heated… Is there another option?
How heated?
Ups do not heat up meant farming so with tnt is difficult
Are the only options.
Ok then that's done
Would it be enough if you had to stand around afk at the farm or should it be fully automatic?
Well the afk would also work but after 15 minutes you get kicked
I see. It's about a server. Yes, then of course it looks different. You probably won't be allowed to build fully automated farms there anyway. They can overload the server quite a bit. In that case, all that remains is the classic cobblestone generator, which you stand at with a pickaxe. This has the advantage that stone pickaxes are used up in under 15 minutes. Accordingly, you would then have to select a new one and the AFK problem would be solved.
