SMC Networks LEF Series

- 6 -
Step motor (Servo/ 24VDC) / Servo motor (24VDC), LEFB25 AC servo motor
With the dust seal band removed as in Chapter 2 Mounting and removal of the dust
seal band and seal band stopper assembly, loosen the screw(2) which retains (3)
pulley holder assembly, and then rotate (1)tension adjusting screw. (Fig. 5-1)
LEFB32, 40
AC servo motor
With the dust seal band removed as in Chapter 2 Mounting and removal of the dust
seal band and seal band stopper assembly, the tension is adjusted by rotating
(1)tension adjusting screw. (Fig. 5-2)
Slide the table to the measurement position and enter the set values on the tension meter.
Measure the tension by flicking the belt on the specified side shown in Fig. 5-3.
Fig.5-3
shows the position of the table and the measurement using the belt tension meter. Table
5-2 shows the values for setting and recommended tension of the tension meter.
Model Screw type Screw size
Tightening torque
+/- 10% [Nm]
Qty.
LEFB16∗T
Hexagon socket
head cap screw
M3x20
0.63
1
LEFB25∗T
M4x20
1.5
1
LEFB32T
M5x25
3.0
1
1
1
End cover
Fig.5-2. Part for belt tension adjustment 2
Fig.5-1. Part for belt tension adjustment 1
Measurement position
of the table
( L )
Belt
Point to measure
the tension
Fig.5-3 Position of the table and measurement
Table.5-1 Pulley holder assembly retaining screws
3
2
Housing A
Motor
Table