After unwanted crash the carrier has cracked. Creating hydraulic oil leak from the axes clamp system, surface finish problem, wrong geometry of machine. In this particular case the Z axis ballscrew bearing will also be replace. Here is some picture of the start progression.In this type of operation a lot of details have to be take into account and meticulously assembled with extra care of like JM CNC can do it.
Here is a very important aspect of every CNC machine, the lubrication circuit have to be taking care to keep all oil amount send to every specific component of your equipment.
Very important to check the ballscrew statement after collision. Run out, cyclic error, axial play, nut play, motor and ballscrew coupling.