2.4.1  Arm 2 Cover 
  The arm 2 cover is secured to the cover set bracket with four (4) cross truss head 
screws (M4 × 10).    As the arm 2 cover is inserted into the arm 2, it can be lifted 
once the screws are removed.    The inserted unit may not be disengaged easily, 
however.    When this happens, it is recommended that the axis 3 be lowered 
beforehand until the ball screw stopper enters the cover so that you can hold the ball 
screw hole (“A” part in Fig. 2.7) when lifting up the cover.    The packing attached to 
the cover can be disconnected together with the cover. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Fig. 2.7    Arm 2 cover 
  Nylon washers are used to protect the cover.    When mounting the cover, be sure to 
set them.    Also, take utmost care not to turn up the packing attached under the 
cover.    After the cover is mounted, manually move up and down the ball screw 
shaft spline while pressing the brake OFF switch, and make sure that the ball screw 
hole will not interfere with the ball screw stopper. 
 
 
 
 
“A” part). 
 
Lower the axis 3 
beforehand.
 
 
 
STE 85306 
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