[simpleTruth]

Or it uses replaceable nozzles which also solves that problem. Anyway, welding robots have been in use for a long time so I expect the basic mechanics to have already been worked out.

PS: how much longer it takes might be less important than how much cheaper it is per weld. If I can pay someone 12$ an hour for 8 hours to do the same work that someone making 50$ an hour does in 4 it's normally a huge net win. On to of that, it will probably become faster fairly soon.