I built MPCNC almost 2 years ago, and I am continuously battling trying to make it relatively square. Sometimes I think I win small battles, but looks like I am losing the complete war.
I havent been using MPCNC for a month or so, and I went to use it today. Previously I precisely squared it, so I was expecting perfect cuts. After cutting the first test, I found that it completely lost its squareness, once again.
I began squaring it again, but after some hour or so, I stopped because this time the situation is more sad than previously. This time I am unable to tighten the rail block at all. Some of bearings are not having grip at all.
The upper bolt is tightened as hell, but the rightmost bearing is not touching the rail…[attachment file=51433]
What will you recommend as the quick solution, and what will be the general one? I’ve got feeling that PLA is not stable in the time perspective, and possibly losing its form under load? Also, it might be the change in humidity that affected the form (it is cold winter here, and humidity is extremely low)
What material do you recommend if I decide to reprint these rail blocks?