I've just got a second hand x3 mill and I noticed the z axis jumping! It wasn't smooth... It would move nicely down and then you could feel and physically hear it jump! The hand wheel didn't actually move the head and then it would fall all of a sudden.i took a video and this was a particularly good example if it working badly! Normally, I can move though 1mm very smoothly and then it happens...in this video, it was doing it often! If you turn the volume up you can hear me cranking the hand wheel but no movement on the dro and clunk when the head does fall.
I've got to sort a few things out now but I'm going to have to come back down in a short while and try and sort this out. Anyone any thoughts on why this would be happening. A quick inspection and it seems the bevel gears are aligned ok at the back. When I turn the graduated hand wheel, the bevel gears are always meshing and the vertical lead screw is moving, just for that short time the head doesn't move with it and falls off a sudden. :-(
I also noticed this x3 model doesn't have a gas strut :-(
I've got to sort a few things out now but I'm going to have to come back down in a short while and try and sort this out. Anyone any thoughts on why this would be happening. A quick inspection and it seems the bevel gears are aligned ok at the back. When I turn the graduated hand wheel, the bevel gears are always meshing and the vertical lead screw is moving, just for that short time the head doesn't move with it and falls off a sudden. :-(
I also noticed this x3 model doesn't have a gas strut :-(