Woodworking engraving machine work, the main axis of the continuous downward, what is the reason?
Hardware: motor failure, transmission parts loose, bearing problems; electrical components: drives, control cards, wires and so on, need to pay attention to exclude.
If you can not see the obvious dislocation of the knife mark, you can control the Z's drive to try with other changes, if there are obvious scratch marks, there may be a lot of reasons
