I am jogging the DICE and let us say I am jogging X only, around the middle of the rail, Y will also move back a few mm. Anybody with a COREXY experience something like this? Thanks.
Surely it’s not just a loose set screw on the gt2 pulley. When belt is off, does it have power to move when you grab the gt2 pulley lightly w your fingers? Just wondering if it’s mechanical or electronical 
Brook
Gah, loose pulley. Nice call. DICE is printing now. @Brook_Drumm you coming to New York Maker Faire?