Hello everyone !
I am doing a retrofit of an Emco PC Turn 55 and I see that in the Z axis it has a backlash of 0.02mm (In the X axis there is no backlash)
Attached photo of the Z axis ball nut support.
Does anyone know how to adjust the preload on this ball nut? There are three screws, two hex head and one slot.

Hugo Gonzalez