If the moving table is obstructing ball screw installation, temporarily remove it. Then clean the mounting surface of support unit housing and base.

Temporarily install the ball screw and support units housings

Install support unit. Loosely install the lock nut.

Confirm vertical alignment of ball screw against linear guide

Adjust the position of support unit housing to maintain parallelism (vertical) using shim etc.

Confirm lateral alignment of ball screw against linear guide

Tighten bolts with specified torque to fix support unit housing

Check shaft end runout while locknut is loosely tightened.

While adjusting the shaft end runout, fasten te locknut to attain required tightening torque

Re-attach the moving table

Attach nut housing to moving table

If you are using long length ball screw, move the ball screw nut toward the support unit in order to minimize the bending of screw shaft by self weight of the nut

Loosen the bolts that fasten the table to the nut housing, and re-fasten them

Loosen the bolts that fasten the nut housing and the nut, and re-fasten them

Tighten bolts with specified torque

Measure the driving torque of ball screw with the moving table in the center

Measure the driving torque of ball screw with the moving table at right stroke end

Measure the driving torque of ball screw with the moving table at left stroke end

Attach motor bracket to base

Measure inclination of motor mounting surface against ball screw. If inclination is large, adjust with shim etc.

Measure eccentricity of motor mounting pilot bore against ball screw. If eccentry error is large, adjust the position of motor bracket.

Check coupling´s specification for allowable inclination and eccentricity error.

Attach coupling and motor. Affix motor with bolts.

Check that coupling can rotate freely before tightening the screw.

Refer to catalog for recommended tightening torque of cap screw and locknut, mounting accuracy reuirements.

Stage 1

Terms Related to the Ball Screw Selection

Accuracy Grade

Difference between Lead and the Pitch of the Ball Screw

Selecting Correct Accuracy Grade for the Ball Screw

Selection of Lead of the Ball Screw

The Speed of the Motor

Check the Lead Ability

Third Step the Selection of Ball Screw Diameter

Summary of Bonus Crew Selection Procedure