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7. ADJUSTMENT
BAS-311G, BAS-326G
103
7-19. Adjusting the backlash of the lower shaft gear
1. Gently tilt back the machine head.
2. Remove the five screws (1) and three flat screws (2),
and then remove the oil cover (3).
3. Remove the four screws (4) and Y-belt cover (5).
4. Loosen the two set screws (6).
5. Place set screw collar R (7) against the edge of the bed so that the pulley can turn easily.
* If the pulley cannot turn easily, loosen the set screw (8) and turn the pulley while moving the rock gear (9) back and
forth. At the position where the pulley moves freely, place set screw collar R (7) against the edge of the bed and
tighten the set screw (8).
6. Turn the rock gear shaft (10) to adjust the play at the end of the driver (11) to 0.05 – 0.15 mm, and tighten the set
screws (6).
5157Q
5256Q
5240Q