Worn leadscrew?

[Doddy]

Well, that's a first to me

If true, could this be indicative of some other underlying problem than "wear and tear"?, misaligned rails?

[JAZZCNC]

If true, could this be indicative of some other underlying problem than "wear and tear"?, misaligned rails?

Absolutely and very probably is due exactly to that reason. Or they are really cheap nasty rails and poorly aligned.? I've never had a rail wear out to that degree and I've probably got 100+ machines out in the field using them and many of them used 12hr 6Dwk with minimal maintenance with several over 10yr old so if quality rails like Hi-win then I'd definitely be looking for some other issue causing this.

[Husky1]

Doddy: rails had 0.03mm error on 700mm