Brother BAS-326G Service Manual page 78

<Y-GT belt tension adjustment>
1. Move the X feed bracket (1) so that it is in the middle of the sewing area in the Y direction and at the left edge of the
sewing area in the X direction.
2. Loosen the two bolts (3) of the Y-pulley bracket (2), and then provisionally tighten them at 19.6 mN · m.
3. Pass the M5x25 screw through the countersunk hole in the side of the bed and screw it into the tap hold in the Y-pulley
bracket (2). Then adjust the belt tension to the following value.
[For a new belt: 250 – 320 N; For a reused belt: 160 – 240 N]
4. Tighten the two bolts (3), and then remove the M5x25 screw.
5. Measure the belt tension once more and check that it is at the following value.
[For a new belt: 500 – 600 N; For a reused belt: 400 – 480 N]
* Be sure to use a belt tension gauge to measure the belt tension, and measure from the bottom of the belt.
* The belt tension gauge should be set to measure a unit weight of 0.04 kg/m, a belt width of 30 mm and a span length of
370 mm.
* The recommended belt tension gauge to use is the Dr. TENSION TYPE-ll manufactured by MITSUBOSHI BELTING
LTD.
BAS-311G, BAS-326G
6. ASSEMBLY
Measurement position
5184Q
71