Yamaha 3-axis model, 4-axis model owner manual Adjusting the speed reduction belt tension

Chapter 11 FXYBX/SXYBX

7-2 Adjusting the speed reduction belt tension

1)Turn the controller power OFF.

2)Remove the end cover.

3)Apply the load listed in Table 11-2 at the center of both pulleys, and measure the deflection at that point. If the results are within the range given in Table 11-2, the tension is suitable.

Table 11-2 Speed reduction belt load and deflection

Model	Load (N)	Load (kgf)	Deflection (mm)
FXYBX X-axis	5.9 to 6.9	0.6 to 0.7	3
FXYBX Y-axis	3.9 to 4.6	0.4 to 0.47	3
SXYBX X-axis, Y-axis	5.9 to 6.9	0.6 to 0.7	3

4) If adjustments are required, loosen the motor plate installation bolt.

5)If the value measured in step 3) is less than Table 11-2, move the motor case in the direction to increase the tension. If larger than the values given in Table 11-2, move the motor case in the direction to decrease the tension.

Tension increases

Tension decreases

Motor plate installation bolt

11-25