Maintenance and inspection procedures 5-84
8) Next, adjusts the tension of the timing belt A <1>.
Lightly loosen two J4 motor fixing screws <7> (Be careful not to overly loosen the screws.).
9) Loosen the nut of tension adjustment screw <8> for timing belt A. Adjusts by turning the tension adjustment
screw <8> slowly and moving the J4 axis motor <9> little by little.
When the screw is turned to the right, the belt will be stretched, and when turned to the left, will loosen.
Adjust tension to the above-mentioned value.
Note) Be careful, if the belt is removed from pulley <10> <4>, or the mesh of belt and pulley <10> <4> is
shifted by loosening the screw too much, the origin will deviate. If the position deviated, reset the
origin. (Refer to
Page 93, "5.6 Resetting the origin"
10) After adjustment, fasten certainly the two J4 motor fixing fixing screws <7> And fasten certainly the nut of
tension adjustment screw <8>. Improper tightening may cause the belt to loosen with vibration.
11) Install No.2 arm cover U and No.2 arm cover D securely as before and finish adjustment.
This completes adjustment of the J4 axis timing belt.
<The No.2 arm bottom view (Inside of the No.2 arm cover D)>
<9>J4 axis motor
<1> Timing belt A
<1>Timing belt A
<8>Tension adjustment screw for
timing belt A
Loosen the nut and screw
<7> J4 axis motor fixing screw
(two screws)
*Exists in the rear of J4 axis also
Push
<10>Timing pulley A
<4>Timing pulley B
<The No.2 arm upper view (Inside of the No.2 arm cover U)>
