MAINTENANCE MANUAL
69
STE 85357
Fig. 2.45 Mounting ball spline nut (THL300, THL400)
4)
Fasten the pulley for the axis 3 nut to the ball screw nut with the hexagon socket
head cap screws (M4 x 25 x 4 pcs.) and the washers and fasten upper stopper..
5)
Temporarily fasten the axis 3 bracket (casting) to Arm 2 with the hexagon socket
head cap screws (M4 x 16 x 4 pcs.). Fasten the ball screw nut to the axis 3
bracket (casting) with the hexagon socket head cap screws (M4 x 12 x 6 pcs.).
At this time, hang the axis 4 timing belt on the axis 4 pulley.
6)
Mount one stopper at 27 mm from the bottom end of the ball screw spline shaft.
Install the stoppers by aligning the notches of the stoppers with the leftmost
spline groove.
7)
Move the ball screw spline shaft up and down to make it fit. After that, holding
the 3rd-axis bracket (casting) so that it does not move, additionally tighten the
hexagon socket head bolts (M4 x 16 x 4 bolts) fixing the 3rd-axis bracket
(casting).
Ball spline nut
Ball screw nut
Hexagon socket
head cap screw
M4 x 12 x 6 pcs.
(Apply medium
strength Loctite.)
Ball spline nut
Axis 4 nut pulley
Hexagon socket
head cap screw
M4 x 10 x 6 pcs.
(Apply medium
strength Loctite.)
Ball screw spline shaft