Extruder alignment including shaft alignment, tube bores alignment, gearbox alignment. Measuring straightness of extruder tube as well as the alignment between the gearbox and the tube. Measuring hydraulic pipes is also possible. Alignment of inlet and outlet spindle center. Shaft alignment between motor and gearbox. Finding deviation between spindle center line and extruder tube center line. Adjusting the spindle center line and the tube center line.