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LINEAR ACTUATORS
INSTALLATION, OPERATING & MAINTENANCE INSTRUCTIONS
W I T H PA R T S L I S T
CMLA Models
with Clutch & Limit Switch
2,200 N - 8,900 N Capacities
(500-2,000 lb)
Publication Part No.192002XXX
Electromechanical Actuators
®
!
CAUTION
!
WARNING
This manual contains important information for the correct installation, operation and maintenance of the equipment described herein. All
persons involved in such installation, operation, and maintenance should be thoroughly familiar with the contents. To safeguard against the
possibility of personal injury or property damage, follow the recommendations and instructions of the manual and keep it for further reference.
The equipment shown in this manual is intended for industrial use only and should not be used to lift,support,or otherwise transport people.
Section I
INTRODUCTION
1-1. General Information
1-4. Warranty and Warranty Repair
This manual provides information for the installation,
Subject to the conditions stated herein,
operation and repair of Duff-Norton electromechanical
Duff-Norton will repair or replace, without charge, any
actuators.
parts proven to Duff-Norton’s satisfaction to have
been defective in material or workmanship. Claims
1-2. Application Information
must be made within one year after date of shipment.
The actuators described in this manual are intended
Duff- Norton will not repair or replace any parts that
for industrial use only and should not be used to lift,
become inoperative because of improper mainte-
support or otherwise transport people or loads over
nance, eccentric loading, overloading, chemical or
people, unless you have obtained written authoriza-
abrasive action, excessive heat, or other abuse.
tion from Duff-Norton that the actuator is suitable for
Equipment and accessories not of Duff-Norton’s
the particular application.
manufacture are warranted only to the extent they are
The actuator is designed for lifting or pushing loads
warranted by the manufacturer, and only if the
no more than its load rating, on an intermittent basis,
claimed defect arose during normal use, applications,
not for applications requiring continuous operation.
and service. Equipment which has been altered or
The actuator is designed for clevis mounting and can-
modified by anyone without Duff-Norton’s authori-
not support side loading of the translating tube.
zation is not warranted by Duff-Norton. Except as
stated herein, Duff-Norton makes no other warranties,
1-3. Inspection
express or implied, including warranties of merchant-
Every actuator is tested at the factory under full rated
ability and fitness for a particular purpose.
load to ensure that the actuator operates properly
Authorization for return must be received from Duff-
and that limit switches precisely stop its travel. Limit
Norton before returning any equipment for inspection
switch settings must be rechecked at installation.
or warranty repair
Inspect the actuator before installation for any evidence of shipping damage or loose parts.
!
WARNING
Improper use can result in personal injury.
To avoid injury:
• Do not use actuators to lift, support, or transport people or
loads over people, without written approval from Duff-Norton.
• Read all product warnings and operating instructions.
2
114
4.47
314
12.38
92
3.62
153
6.02
15
.59
30
1.18
13
.51
31
1.22
80 Across corners
3.15
12
.47
119
4.69
30
1.18
50
1.97
Stroke + 237mm[9.33in]
Figure 1-1. Dimensions in millimeters, CMLA A&B models
125
4.91
338
13.32
100
3.94
179
7.05
20
.79
44.5
1.75
16
.63
29
1.14
63
2.48
16
.63
80 Across Corners
3.15
146
5.75
44.5
1.75
Stroke + 307mm[12.09in] (Stroke up to 600mm*)
*- Pin-to-pin dimension
for 750mm stroke = 1207mm[47.5in]
Figure 1-2. Dimensions in millimeters, CMLA C models
436
17.17
138
5.42
20
.79
44.5
1.75
16
.63
16
.63
29
1.14
121
116.5
4.59
63
2.48
146
5.75
Stroke + 307mm[12.09in] (Stroke up to 600mm*)
* - 750mm stroke pin-to-pin
dimension = 1207 mm[47.5in]
Figure 1-3. Dimensions in millimeters, CMLA D models
3
Section II
INSTALLATION
2-1. Clevis Connections
2-4. Wiring Connections-Three Phase
Refer to Fig. 1-1 for appropriate mounting dimensions.
Three phase actuators require external controls incor-
Models CMLA A and CMLA B should be connected
porating a 3-pole reversing contactor. The actuator’s
with .50 inch diameter steel clevis pins, or bolts with
internal limit switches can be wired into the contactor
enough unthreaded length to provide full clevis sup-
coil circuit to provide limit switch function. The actua-
port. Models CMLA C and CMLA D require .625 inch
tor’s internal electronics are compatible with control
pins. Lightly grease clevis pins to prevent wear and
circuits using 115 to 230 vac control voltage.
noise.
Control circuit connections to the limit switch are
2-2. Motor Capacitor
made through the actuator pigtail electrical cable,
All single-phase AC units use permanent split capaci-
and motor power connections are made to the motor
tor motors requiring an external motor run capacitor.
terminal box. The internal control circuit requires a
Capacitor ratings are listed below.
constant feed of control voltage, in addition to the
Model Voltage Rating
Duff-Norton
No.
actual limit switch feed. When using a 3-phase motor,
the ground wire in the control cable is redundant –
grounding should be done at the motor.
A
115VAC
35µf, 370VAC
SK6405-7-13
A
230VAC
10µf, 440VAC
SK6405-7-10
B
115VAC
50µf, 370VAC
SK6405-7-15
B
230VAC
12.5µf, 370VAC
192002120
For most applications the brake may be connected
C
115VAC
90µf, 240VAC
192002122
directly to the motor leads. For the fastest brake re-
C
230VAC
25µf, 370VAC
192002121
sponse, a separate brake contactor can be used.
Three phase motors use a quick response AC brake.
Control Cable Connections(3 phase with limit switch)
2-3. Wiring Connections-Single Phase
All wiring connections must be made to the pigtail
electrical cable. Refer to the following table for wire
connections. “Extend” and “Retract” feeds must
supply actual motor operating current. The “Line hot”
feed is a low power feed to the electronics that control
actuator limit switch function.
The motor run capacitor may be connected without
regard to polarity.
Control Cable Connections(1 phase with limit switch)
4
Wire
Connect to:
Green/Yellow
Ground
1
Line 1 (Line Neutral)
2
Line 2 (Line Hot)
3
Actuator Extended
4
Actuator Retract
5
Capacitor
6
Capacitor
Wire
Connect to:
Green/Yellow
No connection
1
X2 (control common)
2
X1 (control hot)
3
Actuator Extend signal
4
Actuator Retract signal
5
To Extend contactor coil
6
To Retract contactor coil
The motor and brake are factory connected for 230
2-5. Limit Switch Adjustment
volts. Connect switched power to U1, V1, and W1 on
Limit switch function is provided by a programmed
each terminal board, as shown on the diagrams. To
memory chip inside the actuator. The limit switches
change from 230v to 460v, rewire motor and brake as
are factory set at their extremes of stroke. Limit posi-
follow:
tions may be permanently reprogrammed with the
following procedure.
Motor – Remove the brass links connecting U2, V2,
and W2. Move only the wires marked 7(violet), 8(gray),
and 9(white) from U1, V1, W1, to W2, U2, V2 (straight
across terminal block).
1. Remove the hex socket hole plug on the top of
the actuator housing, near the cable entry.
2. Use the small insulated screwdriver supplied
with actuator to turn the selector switch, visible
Brake – Remove the 3 brass links and reposition them
in the hole, to Position 1 (full counterclockwise).
as shown in the diagram, bridging W2,U2, and V2.
!
3 Phase Motor and Brake Connection
WARNING
The circuit board with switch is electrically live.
Insert screwdriver only to switch. To avoid electrical shock hazard do not touch other parts of the
circuit board.
3. Run the actuator to the position desired for
retracted limit stop.
4. Turn the switch to Position 4 (full clockwise).
5. Run the actuator to the position desired for
extended stop.
6. Turn switch to Position 2 (two clicks CCW).
7. Operate actuator to check new limit positions.
8. Replace hole plug.
Note: Exercise care to avoid jamming the actuator.
5
Section III
OPERATIONAL PRECAUTIONS
3-1. Motor
! CAUTION !
The motor used on this actuator has a very high
power output for its size. Consequently, heat
3-2. Clevis Pins
generation in the motor is more rapid than in more
The clevis pins must be maintained parallel to each
conventional motors. Duty cycle limitations must be
other during the full stroke of the actuator. Side load-
recognized at all times, whether or not the actuator is
ing or twisting as a result of non-parallel clevises can
loaded.
cause serious actuator damage. Any creaking noise at
!
WARNING
When operated near duty limits, external motor
temperature may be hot enough to cause burns.
Actuator should be installed with appropriate precautions to prevent injury to personnel.
Single phase motors are equipped with thermal
protectors to guard against winding burnout. Once
tripped , it may take 10 – 15 minutes for the motor to
cool sufficiently to reset the thermal protector. Repeated thermal trips can be an indicator of excessive
load or duty, low voltage, or weak capacitor (single
phase AC only).
!
the clevises is an indication that pins need lubrication
to prevent pin wear.
3-3. Jamming
Be sure that limit switches are functioning properly to
stop the actuator within its stroke limits.
Actuators are equipped with a load limiting internal
clutch. Actuators with clutches have a degree of
protection against internal or external jamming or
overloading; however, extended slipping of the clutch
will cause accelerated wear and premature actuator
WARNING
If an attempt is made to operate a ball screw
actuator while the motor thermal is tripped, spontaneous lowering of the load may occur.
failure. To provide acceptable long-term operation at
rated load, clutches are set somewhat above rated
load. Do not depend on the clutch to gage an acceptable load. Clutches are not user adjustable for wear.
The fan-cooled 3-phase motors used do not have
thermal protection.
6
Section IV
MAINTENANCE
All parts of the actuator are adequately lubricated for
4-3. Load Bearing
the life of the unit. If the actuator is disassembled for
The bearing is permanently lubricated by the gearbox
repair or inspection, the gear and screw lubricant may
grease. A bearing which shows any sign of roughness
be replenished with an NLGI #1 gear grease.
should be replaced. Clamp screw in a vise with soft
jaws and remove retaining nut.
4-2. Disassembly
!
DANGER
To avoid electric shock hazard and possible
electrocution, disconnect power before removing
cover.
4-4. Reassembly
Assembly is the opposite of disassembly. If the potentiometer setting has been disturbed, set as follows:
1.Fully retract translating tube.
2.Turn pot fully counterclockwise, then clockwise
Loosen the electrical cable nut. Remove the six sock-
¼ turn. Install pot in engagement with threaded
et head screws from the housing. Separate housing
bushing under output gear.
and housing plate, pulling housing over the electrical
3.Resetting of limits will be necessary.
cable. All parts should now be accessible. Disassembly of the screw and translating tube assembly is not
Extreme care should be exercised while refitting cover
anticipated to be necessary, due to the expected long
to avoid damage to electrical wiring or components.
life of the screw and lifting nut.
7
Section IV
MAINTENANCE
8
ITEM NO.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
CMLA A/B Size Exploded Parts List
PART NO.
192000116
EM1050-302
192000497
192000476
192000478
192000479
192000474
192000470
Contact D-N
192000488
S58-43C
S58-63C
192000710
192000723
192000709
Contact D-N
192000157
192000120
192000705
192000703
192000704
Contact D-N
192000595
Contact D-N
192001044
192001046
192001045
192000490
Contact D-N
Contact D-N
192000697
192000695
192000509
Contact D-N
192000508
Contact D-N
Contact D-N
192000486
Contact D-N
192000700
192000707
192000511
192000166
192000446
192000495
192000558
192000482
192000164
192000701
192002244
192002245
192002251
192002261
DESCRIPTION
Housing Plate
6302 Bearing
629 Bearing
Flange Gasket
Tube Gasket
Motor Gasket
Housing Plate Gasket
Shoulder Bushing
Trapezoidal/Ball Screw
DIN 7349~M8 Flat Washer
M8 x 16 Sckt. Hd. Screw
DIN EN ISO 4762 SHCS,M6 x 16
M6 x 100 SHCS
DIN EN ISO 4762 SHCS,M5 x 85
DIN EN ISO 4762 SHCS,M5 x 20
Trapezoidal/Ball Nut
Anti-rotation collar
Tube Flange
Screw, Taptite, M4x25 DIN7500C
Screw, Taptite, M3x6 DIN7500C
Screw, Taptite, M4x6 DIN7500C
Translating Tube
Tube Clevis
Outer Tube
Tube Cap
Oilite bushing
Wiper Seal, 30mm
DIN 34815~Nylon Washer, M4
Motor
Screw bushing
DIN 6885 A - 4 x 4 x 20
DIN 6885 A - 2 x 2 x 14
Pot Bracket
Pot Assembly
Gear, 28t
Clutch Assy
Second Stage Gear
.437NE Lock Nut
First Stage Pinion
DIN6799-7 Circlip
DIN 7984 SHCS,M5 x 16
Wire Clip
U Form Grommet
Housing~M20 Entry
Housing clevis
Spring-Set Brake
Brake cover gasket
Brake Cover
Screw, cheese hd., M3x45
Limit Control Board
Liquid Tight Cord Grip Pigtail (M20)
1/8" Pressure Plug, PTF Type
Limit Control Board Insulator
QTY.
1
1
3
1
2
1
1
1
1
1
1
1
2
4
4
1
1
1
8
2
2
1
1
1
1
1
1
4
1
1
1
1
1
1
1
1
1
1
1
2
4
2
1
1
1
1
1
1
3
1
1
1
1
CMLA A/B Size Exploded View
!
WARNING
Use only replacement parts supplied by or approved by Duff-Norton. Non-authorized parts may
be inadequate resulting in serious injury or death in
the event of failure.
9
Section IV
MAINTENANCE
CMLA C Size Exploded Parts List
ITEM NO.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
10
PART NO.
192000106
192000499
192000498
192000471
Contact D-N
192000477
192000478
192000480
192000475
192000489
192000717
192000711
192000714
192000715
S58-75C
192000111
192000705
192000704
Contact D-N
Contact D-N
192000596
192000159
Contact D-N
192000113
192000494
192000490
192000491
Contact D-N
192000510
Contact D-N
192000508
192000511
192000166
Contact D-N
192000707
Contact D-N
192000700
Contact D-N
Contact D-N
192000487
192000445
192000496
192000560
192000483
192000165
192000702
192002245
192002244
192002261
192002251
DESCRIPTION
Housing Plate
304 Ball Bearing
Ball Bearing
Screw Shoulder Bushing
Trapezoidal/Ball Screw
Flange Gasket
Tube Gasket
Motor Gasket
Housing Plate Gasket
Flat Washer, M12
DIN EN ISO 4762 SHCS,M12 x 20
DIN EN ISO 4762 SHCS,M6 X 12
M6 x 100 SHCS
DIN EN ISO 4762 SHCS,M6 x 100
DIN EN ISO 4762 SHCS,M6 x 25
Tube Flange
Screw, Taptite, M4x25 DIN7500C
Screw, Taptite, M4x6 DIN7500C
Trapezoidal/Ball Nut
Translating tube
Tube Clevis
Anti-rotation collar
Outer Tube
Tube Cap
Wiper Seal, Double Lip
DIN 34815~Nylon Washer, M4
Woodruff Key 5 x 9 (x22)
Screw Bushing
Pot Bracket
Potentiometer Assembly
Gear, 28t
Wire Clip
U Form Grommet
Motor
DIN 7984 SHCS,M5 x 16
First Stage Pinion
DIN6799-7 Circlip
Clutch Assembly
Second Stage Gear
Lock Nut, M16x1.5
Housing
Housing Clevis
Motor Brake~103V
Brake cover gasket
Brake Cover
Screw, cheese hd., M4x50
Liquid Tight Cord Grip Pigtail (M20)
Limit Control Board
Limit Control Board Insulator
1/8" Pressure Plug, PTF Type
QTY.
1
1
3
1
1
1
2
1
1
1
1
1
2
4
4
1
8
4
1
1
1
1
1
1
1
4
1
1
1
1
1
2
1
1
4
1
2
1
1
1
1
1
1
1
1
3
1
1
1
1
CMLA C Size Exploded View
!
WARNING
Use only replacement parts supplied by or approved by Duff-Norton. Non-authorized parts may
be inadequate resulting in serious injury or death in
the event of failure.
11
Section IV
MAINTENANCE
CMLA D Size Exploded Parts List
ITEM NO.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
12
PART NO.
192000106
192000499
192000498
192000477
192000478
192000481
192000475
Contact D-N
Contact D-N
Contact D-N
192000489
192000717
S58-63C
S58-75C
192000714
192000715
192000711
192000111
Contact D-N
192000596
Contact D-N
192000113
Contact D-N
192000491
Contact D-N
Contact D-N
192000487
192000557
Contact D-N
192000510
192000704
192000705
192000507
192000508
192000511
192000166
192000445
192000496
192000159
192002245
192002261
192002251
192002244
192000490
192000494
DESCRIPTION
Housing Plate
304 Ball Bearing
Ball Bearing
Flange Gasket
Tube Gasket
IEC71-B14 Motor Gasket
Housing Plate Gasket
Trapezoidal/Ball Screw
Screw Shoulder Bushing
Trapezoidal/Ball Nut
Flat Washer, M12
DIN EN ISO 4762 SHCS,M12 x 20
DIN EN ISO 4762 SHCS,M6 x 16
DIN EN ISO 4762 SHCS,M6 x 25
M6 x 100 SHCS
DIN EN ISO 4762 SHCS,M6 x 100
DIN EN ISO 4762 SHCS,M6 X 12
Tube Flange
Translating tube
Tube Clevis
Outer Tube
Tube Cap
Screw Bushing
Woodruff Key 5 x 9 (x22)
Clutch Assembly
Second Stage Gear
Lock Nut, M16x1.5
Motor, IEC 71B14
First Stage Pinion
Pot Bracket
Screw, Taptite, M4x6 DIN7500C
Screw, Taptite, M4x25 DIN7500C
Potentiometer Assembly
Gear, 28t
Wire Clip
U Form Grommet
Housing
Housing Clevis
Anti-rotation collar
Liquid Tight Cord Grip Pigtail (M20)
Limit Control Board Insulator
1/8" Pressure Plug, PTF Type
Limit Control Board
DIN 34815~Nylon Washer, M4
Wiper Seal, Double Lip
QTY.
1
1
3
1
2
1
1
1
1
1
1
1
4
4
2
4
1
1
1
1
1
1
1
1
1
1
1
1
1
1
4
8
1
1
2
1
1
1
1
1
1
1
1
4
1
CMLA D Size Exploded View
!
WARNING
Use only replacement parts supplied by or approved by Duff-Norton. Non-authorized parts may
be inadequate resulting in serious injury or death in
the event of failure.
13
LINEAR ACTUATORS
®
P.O. Box 7010 • Charlotte, NC 28241-7010
Phone: (800) 477-5002 • (704) 588-4610
Fax: (704) 588-1994
Email: duffnorton@cmworks.com
www.duffnorton.com