Star Micronics NX-1020 Technical Manual page 44

ADJUSTMENTS
2. Adjustment of Timing Belt Tension
The timing belt tension should be set at from 15g to 19g.
(The belt tension must be measured with the designated tension gauge [1].)
After the belt has been used for a long time, however, it may be difficult to maintain prescribed tension because of belt
deterioration or wear. In these cases, make adjustments by following the procedures listed below.
(1) Remove the upper case unit according to the procedures described in Chapter 4.
Move the carriage unit [2] right and left two or three times in order to familiarize yourself with the timing belt [3].
(2)
Set the index lever [4] at step 2 as shown in Fig. 3-2.
(3)
Move the carriage unit [2] to the right end.
(4)
(5) Set the arm [5] of the tension gauge [1] 142mm apart from the frame L.
Move the tension gauge [1] in the direction of the platen [6] until it stops. Then place the arm [5] of the tension
(6)
gauge on the timing belt [3].
Loosen the screw [7].
(7)
Insert a flat-blade screwdriver into the square hole of the tension arm [8] and adjust the belt tension by moving the
(8)
tension arm [8] left or right.
(9) When the belt has been adjusted to the prescribed tension, tighten the setting screw [7].
(10) If the belt cannot be adjusted to the prescribed tension, replace it with a new timing belt [3].
Fig. 3-5 Adjustment of Timing Belt Tension
Fig. 3-6 Tension Measurement
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