Problems with linear motion block


#1

I just bought 3x Linear Motion Guide and 3x Linear Motion Block. After some lubrication two of the sets are functioning ok (not stellar), but the the third block runs rather uneven, even after some tries. It works better, when pushing vertically on it, but movement is far from smooth - the resistance as actually changing a lot, so no chance to use it in a stepper motor setup - any hints?

MM


#2