SMC Networks LEF Series User manual

Product Name

Electric Actuator / Slider Type

Model / Series / Product Number

LEF

LEFS/LEFB Series

Doc.No. LEF-MM01601-A

LEFS Series

(Ball screw type)

LEFB Series

(Belt drive)

Maintenance Manual

Products after parts replacement by the user are

outside of warranty.

Track changes

Rev.

symbol

Date of

change

Details of the changes

Approved

Person in

charge

Remarks

- 2016/03/23 First edition T.Sugiyama

2016/03/23 H.Shiomi

2016/03/23

A 2016/06/16 Addition of grease part number. T.Sugiyama

2016/06/20 T.Nakazawa

2016/06/16

- 1 -

Contents

1. Maintenance Precautions .................................................. - 2 -

2. Mounting and removal of the dust seal band and seal band stopper

assembly............................................................................. - 3 -

3. Applying additional grease on the guide.......................... - 4 -

4. Replenishment of grease for the ball screw..................... - 5 -

5. LEFB Belt Tension Adjustment ......................................... - 5 -

6. Mounting/ removal of the motor and peripheral equipments

(Ball screw type)..................................................................... - 7 -

7. Mounting/ removal of the motor and peripheral equipments (Belt type)

- 15 -

8. Mounting/ removal of the Belt (Belt type)......................... - 19 -

9. Mounting/ removal of the hub (pulley) at the motor side - 23 -

10.Mounting/ removal of the Housing................................... - 25 -

- 2 -

1. Maintenance Precautions

Warning

1) Remove the workpiece and disconnect the power supply during maintenance and replacement

of the product.

[Maintenance frequency]

Preform maintenance according to the table below. if there are any problems, please contact SMC.

Inspection frequency

Appearance check

Internal check

Belt check

Inspect daily before operating

Good

* Every 6 months or every 1000km

or every 5,000,000 cycles

Good Good Good

* Either of inspection early time is selected.

[Items for visual appearance check]

1. Loose set screws, abnormal/excessive dirt

2. Scratches, cable joint

3. Vibration, noise

[ Internal check item ]

1.Lubricant condition and dirt on moving parts.

For lubrication, use lithium grease No. 2. (Refer to table 3-1.)

2.Loose or mechanical play in fixed parts or fixing screws.

[Items for belt check]

Stop operation immediately when the belt appears to be like malfunction shown in the pictures below.

If it occurs in the first stage of use, confirm it is within the range of the product specification, the

system requirements and conditions of use.

Return the actuator to SMC for the belt to be replaced. （When replacing the belt, please contact

SMC for the instruction manual. Adjustment of the motor origin and adjustment of the belt tension etc.

is difficult. Therefore we recommend returning the actuator to SMC for the belt to be replaced.)

a. Tooth shape canvas is worn out

Canvas fiber becomes fuzzy. Rubber is removed and the fiber becomes whitish. Lines of fibers

become unclear.

b. Peeling off or wearing of the side of the belt

Belt corner becomes round and frayed thread sticks out.

c. Belt partially cut

Belt is partially cut. Foreign matter caught in teeth other than cut part causes flaw.

d. Vertical line of belt teeth

Flaw which is made when the belt runs on the flange.

e. Rubber back of the belt is softened and sticky

f. Crack on the back of the belt

- 3 -

2.) If no locking adhesive is applied to the bolts or screws, take a countermeasure against

loosening.

3) Refer to the spare parts list in the separate sheet for the part numbers and details of the

spare parts.

Japanese version: LEF-MM01101, LEF-MM01201

English version: LEF-MM01301, LEF-MM01401

4). It is recommended replacing the motor as a motor assembly.

2. Mounting and removal of the dust seal band and seal band stopper assembly

2-1. Loosen the retaining screws for the band stopper.

Size Screw type Screw size

Tightening torque

+/- 10% [Nm]

Qty.

Round head combination

screw

M2.5x5

0.36

M3x6

0.63

M3x6

2-2. Remove the seal band stopper at the opposite side of the motor, and pull out the

blanking plate.

Size Screw type Screw size

Tightening torque

+/- 10% [Nm]

Qty.

Cross recessed round

head screw

M2.5x16

0.36

M3x20

0.63

M4x30

0.76

M4x35

Applicable model: LEFS/LEFB

Opposite side of the motor

Motor side

Band stopper

Table.2-1 Band stopper fixing screws

Fig.2-1 Seal band stopper assembly

Seal band stopper

Table.2-2 Seal band stopper fixining screws

Retaining screws for the

band stopper

Blanking plate

Cross recessed round

head screw

- 4 -

2-3. Pull out the dust seal band to the opposite side of the motor.

2-4. To put the dust seal band back, mount the dust seal band in reversed order of 2-1 to 2-3.

For the replacement of the dust seal band and seal band stopper assembly, order

replacement parts referring to the spare parts list in the attachment.

3. Applying additional grease on the guide.

3-1. Remove the dust seal band. ( Refer to Chapter 2 Mounting and removal of the dust

seal band and seal band stopper assembly)

3-2. Apply grease to the entire guide groove using a spatula (Fig. 3-1).

Slowly slide the table by hand so that the grease is applied to the inside of the guide.

Be careful not to smear the belt with grease.

After replenishment, perform several test runs to allow the grease to spread evenly.

* For lubrication, use lithium grease No. 2.

When ordering the grease from SMC, please order a grease pack: GR-S-.

* Not applicable for clean series, secondary battery or special product. Please contact

SMC.

Table.3-1 Grease package (Lithium grease No. 2) A

Applied section

Product No.

Refer to the

above figure

GR-S-010 (10g)

GR-S-020 (20g)

3-3. Mount the dust seal band. ( Refer to Chapter 2 Mounting and removal of the dust seal

band and seal band stopper assembly)

Direction to pull the dust seal band to remove

Applicable model: LEFS/LEFB

This fig. shows belt Type

Same for ball screw type

Fig. 3-1 Position for application of grease

Dust seal band

Apply grease here (2 places)

Table

- 5 -

4. Replenishment of grease for the ball screw

4-1. Remove the dust seal band. ( Refer to Chapter 2 Mounting and removal of the dust

seal band and seal band stopper assembly)

4-2. Apply grease to the entire ball screw shaft using a spatula.

Slowly slide the table by hand so that the grease is applied to the inside of the ball

screw nut.

After replenishment, perform several test runs to allow the grease to spread evenly.

* For lubrication, use lithium grease No. 2.

When ordering the grease from SMC, please order a grease pack: GR-S-.

* Not applicable for clean series, secondary battery or special product. Please contact

SMC.

Table.4-1 Grease package (Lithium grease No. 2) A

Applied section

Product No.

Refer to the

above figure

GR-S-010 (10g)

GR-S-020 (20g)

4-3. Mount the dust seal band. ( Refer to Chapter 2 Mounting and removal of the dust seal

band and seal band stopper assembly)

5. LEFB Belt Tension Adjustment

Applicable model: LEFS

Ball screw shaft

Grease applied surface

Fig. 4-1 Places of grease application

Applicable model: LEFB

< Foreword >

It is recommended to use a belt tension meter.

If you do not have a belt tension meter, align the belt back to the original position that was

marked before removal.

Recommended belt tension meter: (Gates Unitta Asia: U-508)

- 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

LEFB25∗T

M4x20

1.5

LEFB32T

M5x25

3.0

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

Housing A

Motor

Table

- 7 -

Model

Measurement

position of the

table

(L) [mm]

Set values for acoustic belt tension

meter

Recommended

belt tension [N]

+/-10%

WIDTH

[mm]

SPAN

[mm]

WEIGHT

（∗）

LEFB16∗T

170

200 2.5

LEFB25∗T

150

LEFB32T

130

LEFB25∗(S/T/V)

150

LEFB32∗(S/T/V)

130

136

LEFB40∗(S/T/V)

117

186

∗ Unit: g/mm (Width) x m (Length)

6. Mounting/ removal of the motor and peripheral equipments

(Ball screw type)

6-1. Remove the motor cover

6-1-1. Step motor (Servo/ 24VDC) and servo motor (24VDC)

Inline motor mounting type

Remove the screws (1). Hold the rubber bushing (4) while removing the end cover (2)

from the rubber bushing upward. Remove the motor cover (3), and remove the

grommet from the cable (5).

Part to be

tightened Model

Screw

Tightening

torque +/-

10% [Nm]

Type Size Qty.

(2) End cover

LEFS16

∗∗

∗

(1) Cross recessed round

head screw

M3x80

2 0.32

LEFS16

∗∗

∗

M3x120

LEFS25∗∗-∗M3x75

LEFS25

∗∗

∗

M3x120

LEFS32

∗

M3x80

LEFS32

∗

M3x130

LEFS40

∗

M4x100

0.76

LEFS40∗-∗B

M4x150

Table.5-2 Data required for setting the tension meter that are recommended to tension the belt.

Applicable model: LEFS

Table.6-1 Motor cover fixing screws

- 8 -

Parallel motor mounting type (without lock)

(6) Insert something flat such as a cable tie behind the fingers of the motor cover to

lift the fingers.

Parallel motor mounting type (with lock)

(6) Lift the fingers of the motor cover to remove the cover. Referring to the removal

procedure of 6-2-2, remove the motor. And then, remove the motor cover with lock(8)

holding the grommet(7).

Finger

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