7-16. Adjusting the thread trimmer cam position; 7-17. Belt tension adjustment; 7-16. Adjusting the thread trimmer cam position - Page 108

7. ADJUSTMENT 

BAS-311G, BAS-326G 

101

7-16. Adjusting the thread trimmer cam position 

1.  Remove the top cover. 
2.  Loosen the two set screws (1), and then adjust the 

position of the thread trimmer cam (3) so that the 
distance between the edge of the collar shaft (2) and 
the edge of the thread trimmer cam (3) is 0.2 - 0.5 mm. 
After adjusting, tighten the two set screws (1). 

7-17. Belt tension adjustment 

<X-GT belt>

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
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 X-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 X-pulley 

bracket (2). Then adjust the belt tension to 220 - 250 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 320 - 350 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.

4685Q

5213Q

Measurement position