Originally Posted by
Sepult
You're claiming sand won't harm bearings or linear motion parts, and yet you claim to have a "very good understanding" of these machines. I don't think the former supports the latter.
As for the subject of one of your veiled attacks, viz. newton009, he wasn't the only one who found debris. JoeBeans teardown thread mentions sand, paper and other debris stuck on the ballscrews. Unfortunately the pictures are gone now so we can't see how bad, but it's mentioned several times. So it wasn't just one small thing.
You imply you have little if any slag or sand in your machine, and you even questioned the intelligence of tearing the mill down, presumably due to it being a non-issue in your mind. But how can you know what's there if you haven't looked? You're propping up your beliefs on false evidence.
Logically no one who is genuinely interested in learning about these mills should have a problem with people pointing out the good and bad experiences they have had with them. Unfortunately people who are invested in an outcome are easy prey for logic fallacies, particularly wishful thinking. Thus this thread has devolved into emotional, dogmatic attacks on those with different experiences. ad hominem. People are no longer interested in the facts but instead want to prop up their own beliefs. Which is too bad, as it's effectively pointless to continue now since this is no longer a discussion.
And this is not the first time this has happened in this forum. Thus, those wo have had negative experiences are going to be even less likely to post (there were already several hurdles to overcome - their own wishful thinking with wanting to believe they made a good choice, as well as the desire not to upset the company on which they were reliant for service) as they know they're likely to get "flamed" for it. As a result, you've effectively created a society of similar thinking people which propogates the problem through argumentum ad populum.