Scara Mechanical Unit Manual
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37
(2)
Move the arm to the position that Joint #3 is to its full motion distance.
(3)
Press the brake release switch. Meanwhile, move the shaft to the upper limit.
(4)
Turn off the controller.
(5)
Clean up the remaining grease on the shaft and add new grease. Use tools such as a clean brush to
paint the new grease until it covers the slot on the upper end of the shaft. Then clean up the remaining
grease.
(6)
Turn the controller power ON.
(7)
Press the brake release switch. Meanwhile, move the shaft to the lower limit
。
(8)
Clean up the remaining grease on the shaft and add new grease. Use tools such as a clean brush to
paint the new grease until it covers the slot on the lower end of the shaft. Then clean up the remaining
grease
(9)
Press the brake release switch. Meanwhile, move the shaft up and down several times to apply the
grease evenly. Then clean up the remaining grease.
CAUTION
Turn off the controller power and remove the cover on the upper side of the
arm when cleaning up the grease on the shaft.
Incorrect operation of greasing may increase the possibility of rust on the ball
screw spline.
5.3.
Tightening Hexagon Socket Head Cap Bolts
Hexagon socket head cap bolts are used in places where mechanical strength is required. (A hexagon
socket head cap bolt will be called a “bolt” in this manual.)
These bolts are fastened with the tightening torques shown in the following table. When it is necessary to
refasten these bolts in some procedures in this manual (except special cases as noted), use a torque wrench so
that the bolts are fastened with the appropriate tightening torques as shown below.
Bolt
Tightening Torque
M3
2.0 N·m
M4
4.0 N·m
M5
9.01±0.49 N·m
M6
15.6±0.78 N·m
M8
37.2±1.86 N·m
