7. ADJUSTMENT
99
BAS-342G
<Y-GT belt>
1. Provisionally tighten the eight bolts (1) and the four bolts (2).
2. Tighten the M6x30 bolt, and then pull the Y pulley bracket (3) to adjust the tension.
3. Fully tighten the four bolts (2) of the Y pulley bracket (3).
4. Fully tighten the eight bolts (1).
5. Remove the M6X30 bolt.
6. Move the Y arm (4) forward (in the direction of the arrow).
7. Use a tension gauge to measure the tension at the middle of the lower belt while referring to “Measurement position” in
the illustration. (Refer to “6-5-1. Y-feed mechanism” for details on measuring the tension.)
*
Check that the value for the belt tension is within the following value ranges. If it is not within this range, repeat steps 2 to 7.
[For a new belt: 650 - 750 N; For a reused belt: 520 - 600 N]
* The belt tension gauge should be set to measure a unit weight of 0.04 kg/m, a belt width of 50 mm and a span length of
333 mm.
* It is recommended that you use the Yunitta U-505 tension gauge.
1387B
Microphone position
Microphone position
Finger
pressing
position
[Measurement position]
Middle of belt
Finger
pressing
position
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