MAINTENANCE MANUAL
183
STE 85357
Fig. 4.47 Mounting ball spline nut (THL800, THL900, THL1000)
4)
Mount the axis 4 timing belt and axis 4 motor assembly, then adjust the belt
tension. (See
“Para. 4.5.4, Replacing Axis 4 Timing Belt.”)
5)
Temporarily tighten the axis 4 bracket to Arm 2 with four (4) hexagon socket
head bolts (M4 x 16).
6)
Secure the axis 3 nut pulley to the ball screw nut with four (4) hexagon socket
head bolts (M5 x 20) and washers. Mount the upper stopper. For the stopper
mounting position, see Fig. 4.49.
Ball spline nut
Ball screw nut
Ball screw spline shaft
Hexagon socket head bolts
M5 x 12 x 6 pcs.
(Apply medium strength Loctite.)
Washer
Axis 4 nut pulley
Hexagon socket head bolts
M4 x 12 x 6 pcs.
(Apply medium strength Loctite.)
Fasten so that the removal tap
faces the direction of the arrow.
Ball spline nut