Yamaha 4-axis model Adjusting the Timing Belt Tension, Adjusting the speed reduction belt tension

Chapter 11 FXYBX/SXYBX

7 Adjusting the Timing Belt Tension

WARNING

The motor and speed reduction gear casing are extremely hot after auto- matic operation, so burns may occur if these are touched. Before han- dling these parts, turn the controller power OFF, wait for a while and check that the part has cooled.

WARNING

There is a risk of injury if fingers, etc., are caught between the drive sec- tion pulley and belt. Always turn the controller power OFF and carefully carry out the work if these parts may be contacted.

!CAUTION

The position will deviate when the belt tension is adjusted.

Carry out return-to-origin or absolute reset, and reset the point data.

The X-axis and the Y-axis for the FXYBX and SXYBX use a timing belt to drive the slider.

If the timing belt tension is week, adjust the belt tension with the following pro- cedures.

L/2L/2

Push-pull scale

Deflection

Load

PulleyBelt

Pulley

Fig. 11-19 Adjusting the speed reduction belt tension

Table

Push-pull scale

Load Deflection

Belt

Pulley

Fig. 11-20 Adjusting the drive belt tension

5

Belt

Push-pull scale

Nut

Stay

Nut

Fig. 11-21 Stay (example)

25

55

Hole

10

15

3.2 thick sheet metal

11-22