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11-25
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.
Model Load (N)
Load (kgf)
Deflection (mm)
FXYBX X-axis
FXYBX Y-axis
SXYBX X-axis, Y-axis
5.9 to 6.9
3.9 to 4.6
5.9 to 6.9
0.6 to 0.7
0.4 to 0.47
0.6 to 0.7
3
3
3
Table 11-2 Speed reduction belt load and deflection
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.
Motor plate
installation bolt
Tension increases
Tension increases
Tension decreases
Tension decreases