Curtiss-Wright EXLAR GTX Series Instructions d'installation et d'entretien
This document does not contain any export-controlled technical data.
Information furnished by Exlar Corporation is believed to be accurate and reliable. However, no responsibility is assumed by Exlar Corporation for
its use. Exlar reserves the right to change the design and operation of the equipment described herein and any associated motion products that
may appear in this document. Information in this document pertaining to equipment not furnished by Exlar should be conrmed by that equipment
manufacturer. Exlar assumes no responsibility for changes to information by other manufacturers or errors in that information or the description of that
information. Information in this document is subject to change without notice.
Integrated Motor Actuator
Installation & Service Instructions
Rev. J | PN75557 | 12/19/23
GTX SERIES actuators
2| GTX Installation & Maintenance Instructions Curtiss-Wright | Rev J | PN75557 | 12/19/23
CONTENTS
1.0 INTRODUCTION .................................................................................................................3
1.1 GENERAL PRODUCT DESCRIPTION .....................................................................................................3
1.2 PRODUCT FEATURES ..............................................................................................................................3
1.3 SAFETY CONSIDERATIONS ....................................................................................................................4
2.0 SYSTEM CONFIGURATION ..............................................................................................5
2.1 GTX SERIES ACTUATOR..........................................................................................................................5
2.2 OPTIONS.....................................................................................................................................................5
2.2.1 Servomotor Ampliers........................................................................................................................5
2.2.2 Feedback Devices .............................................................................................................................5
2.2.3 Resolvers...........................................................................................................................................5
2.2.4 Encoders............................................................................................................................................5
2.2.5 Internal Holding Brake .......................................................................................................................5
2.2.6 Anti-Rotation Assembly......................................................................................................................5
2.2.7 Splined Rod Options..........................................................................................................................6
2.2.8 External Limit Switch .........................................................................................................................6
2.2.9 Stainless Steel Rod Options ..............................................................................................................6
3.0 MECHANICAL INSTALLATION ..........................................................................................6
3.1 MOUNTING CONFIGURATIONS ..............................................................................................................6
3.2 MOUNTING CONSIDERATIONS ..............................................................................................................8
3.2.1 Actuator Alignment.............................................................................................................................8
3.2.2 Feedback Device Alignment ..............................................................................................................8
3.2.3 Anti-Rotation Assembly......................................................................................................................9
3.2.4 External Limit Switch .......................................................................................................................10
3.3 LUBRICATION .......................................................................................................................................... 11
4.0 ELECTRICAL INSTALLATION..........................................................................................11
4.1 SAFETY CONSIDERATIONS .................................................................................................................. 11
4.2 CABLE ROUTING..................................................................................................................................... 11
4.3 AMPLIFIER PINOUTS AND CONNECTIONS ........................................................................................12
4.4 CONNECTING OPTIONAL EQUIPMENT...............................................................................................12
4.4.1 Feedback Devices – Encoders ........................................................................................................12
4.4.2 Internal Holding Brake .....................................................................................................................12
4.4.3 External Limit Switch ......................................................................................................................12
5.0 STARTUP ...........................................................................................................................13
5.1 CONSIDERATIONS FOR STARTUP.......................................................................................................13
5.1.1 Safety Considerations......................................................................................................................13
5.1.2 Amplier Software............................................................................................................................13
5.1.3 Rotary-To-Linear Motion Relationship .............................................................................................13
5.1.4 Amplier Wiring................................................................................................................................13
5.2 GENERAL STARTUP PROCEDURE ......................................................................................................13
6.0 MAINTENANCE PROCEDURES .....................................................................................15
6.1 LUBRICATION ..........................................................................................................................................15
Grease Renewal Procedure ....................................................................................................................15
6.2 SEAL MAINTENANCE..............................................................................................................................15
6.3 REPLACEMENT FACEPLATE ASSEMBLY KIT.....................................................................................16
7.0 TROUBLESHOOTING ......................................................................................................16
8.0 PRODUCT RETURNS.......................................................................................................17
9.0 CERTIFICATIONS .............................................................................................................17
9.1 IMPORTER REQUIREMENTS ................................................................................................................18
9.2 DISTRIBUTOR REQUIREMENTS ..........................................................................................................19
10.0 WARRANTY INFORMATION..........................................................................................20
GTX Installation & Maintenance Instructions | 3www.exlar.com | 952.500.6200
1.0 INTRODUCTION
1.1 GENERAL PRODUCT DESCRIPTION
GTX Series actuators feature a robust planetary roller screw mechanism integrated into the rotor of a brushless servomotor.
This unique design combines the high speed and high load capacity of the roller screw with the high torque-to-volume ratio of
the brushless servomotor.
Completing the actuator design is the choice of feedback devices. The most common types of feedback devices are resolvers,
incremental encoders, and absolute encoders. Selecting the proper feedback conguration allows GTX Series actuators to be
powered by brushless motor ampliers readily available from most leading motor manufacturers.
GTX Series actuators oer a true all-electric replacement solution for cumbersome, high-maintenance hydraulic systems.
Electronic servo control also provides simpler setup and more precise control than hydraulic systems. This exibility makes
GTX Series actuators an excellent motion control solution for today’s highest performance single- and multi-axis applications.
From food and beverage packaging to multi-axis turning centers to aircraft assembly, GTX Series actuators deliver outstanding
performance and durability.
GTX Series actuators feature an Ingress Protection Rating of IP66S.
1.2 PRODUCT FEATURES
T-LAM brushless servo motor
Inverted roller screw
High-pressure seal,
high-load bushing,
and rod scraper
integrated within
an easily replaceable
faceplate
Induction-hardened
chrome plated output rod
for maximum wear resistance
Industry standard rotatable
M23 connectors with pinouts
to match amplifier manufacturer's
standard cables
Feedback device
and alignment to
match amplifier
manufacturer
specifications
Inverted roller screw
Figure 1 – GTX Series Actuator features
4| GTX Installation & Maintenance Instructions Curtiss-Wright | Rev J | PN75557 | 12/19/23
1.3 SAFETY CONSIDERATIONS
Safety is of paramount importance during the installation and operation of your GTX Series actuator. Throughout this manual,
content agged with the cautionary symbols shown below should be read carefully by installers and operators to help avoid
property damage, personal injury or death.
DANGER! Indicates an extremely hazardous situation which will result in serious injury or death if precautions are
not followed. Extreme care should be taken in these situations.
WARNING! Indicates a potentially hazardous situation which could result in serious injury or death if precautions are
not followed. Extra care should be taken in these situations.
CAUTION! Indicates a potentially hazardous situation which could result in property damage or minor to moderate
injury.
IMPORTANT! Identies statements that provide important information to help ensure safe and trouble-free installation
and operation.
GTX Installation & Maintenance Instructions | 5www.exlar.com | 952.500.6200
2.0 SYSTEM CONFIGURATION
2.1 GTX SERIES ACTUATOR
GTX Series actuators provide a robust solution for long-life, continuous-duty applications even when environmental
contaminants are an issue. In most rotary-to-linear devices, critical mechanisms are exposed to the environment and must be
frequently inspected, cleaned and lubricated. In contrast, GTX Series actuators are designed with all converting components
mounted within sealed motor housings. With a simple bushing and seal on the smooth extending rod, abrasive particles or
other contaminants are prevented from reaching the actuator’s critical mechanisms. As a result, actuator life can exceed that
of a ball screw actuator by 15 times, even in high-speed, high-force applications.
2.2 OPTIONS
2.2.1 Servomotor Ampliers
GTX Series actuators function in the same manner as a brushless servomotor. A brushless servo motor amplier is used to
rotate the motor for a controlled number of revolutions and move times at controlled speed and torque. This rotary motion is
translated into linear motion by the GTX Series actuator’s internal planetary roller screw mechanism.
2.2.2 Feedback Devices
Feedback device selection is dictated by the amplier used to operate the actuator. Each amplier has specic requirements
for motor feedback. Standard GTX Series actuators use either a 2-pole resolver or quadrature incremental encoder as their
primary feedback device.
2.2.3 Resolvers
A resolver is a non-electronic device that functions similarly to a small transformer. When rotated, the resolver generates two
sine waves that are out of phase with one another. By decoding these two sine waves, the amplier can monitor the motor
direction, revolutions traveled, and speed of rotation. Each sine wave typically represents one revolution of the motor. The
amplier uses these signals to identify where the motor is within that revolution and properly time the supply of current and
voltage to the motor for it to rotate. This process is known as “commutation”. For the amplier to properly commutate the
motor, it must have a reference (or “zero”) point from which to track the motor’s rotation.
IMPORTANT! The zero point is critical and is provided to the amplier through the proper alignment of the resolver to the
phases of the motor during the actuator assembly. NOTE: Not all resolver-based ampliers can use the same resolver, resolver
alignment, or relative direction of resolver rotation.
2.2.4 Encoders
An incremental encoder is an electronic rotary device that transmits a string of electrical pulses when rotated to measure
position. A quadrature encoder (or “incremental rotary encoder”) measures the speed and direction of a rotating shaft. Most
brushless motor or servo systems with incremental encoders use a quadrature encoder. NOTE: Not all encoder-based
ampliers can use the same encoder, encoder alignment or relative direction of encoder rotation.
2.2.5 Internal Holding Brake
Many applications require the addition of a holding brake. The Exlar internal holding brake is engaged by a permanent-
magnet. The mechanical advantage of the roller screw allows the holding brake to prevent the output rod from back-driving the
load. The holding capacity of the brake is sucient to hold the rated force of the actuator.
2.2.6 Anti-Rotation Assembly
The unique design of GTX Series actuators helps simplify actuator setup by allowing the user to rotate the extending rod
and thread it in and out of the actuator for mechanical attachment or system testing. In most applications, the load is coupled
to linear bearings or some other support device, preventing rotation during operation. To ensure proper linear motion in
applications in which the rod is free to rotate, an Anti-Rotate Assembly is required to prevent the rod from rotating.
6| GTX Installation & Maintenance Instructions Curtiss-Wright | Rev J | PN75557 | 12/19/23
2.2.7 Splined Rod Option
The splined rod is an internal anti-rotate option that will restrict rotation but still provide linear motion without the need for an
external mechanism. It is not suitable for environments where contaminants may be able to penetrate the actuator. The option
does NOT meet the IP66S rating as there is no sealing component where the driven rod extends and retracts. If the unit is
installed vertically rod end down there is potential for grease to exit the unit in environments where overheating can occur.
2.2.8 External Limit Switch
A GTX Series actuator equipped with the anti-rotate and limit switch options can accommodate multiple limit switches for use
as end-of-travel limit switches or home position sensors positioned outside the low-prole extruded channel housing.
2.2.9 Stainless Steel Rod Options
All thread options on the GTX product line are available in 17-4 stainless steel. This option provides improved corrosion
resistance for the main rod of the actuator. This option can be benecial in applications where the rod could be exposed to
harsh chemicals or outdoor environments.
3.0 MECHANICAL INSTALLATION
3.1 MOUNTING CONFIGURATIONS
1
2
3
4
5
6
78
1 - Front Flange Kit*
2-Face Mount Kit
3 - External Limit Switch Kit**
4-External Anti-Rotate Kit
5 - Multiple Rod End Threads***
6 - Internal Anti-Rotate (Splined Rod)***
7-Rear Brake Option
8-Rear Clevis Kit*
* Metric/Imperial Options
** Limit Switches Sold Separately
*** Male/Female and Metric/Imperial Options
Figure 2 – Mounting congurations
GTX Series actuators mounting congurations:
• Rear clevis
• Front ange
• Tapped face
• Side mount.
GTX Installation & Maintenance Instructions | 7www.exlar.com | 952.500.6200
Figure 3 – Rear clevis mount (NOTE: Dimension drawings can be found in the
GTX Series Actuator catalog or on the Exlar website.)
GTX060: 5 mm Hex
GTX080: 6 mm Hex
GTX100: 8 mm Hex
Torque 4.6 Nm (3.4 ft-lbs)
Torque 12.2 Nm (9 ft-lbs)
Torque 23 Nm (17 ft-lbs)
GTX060: 5 mm Hex
GTX080: 6 mm Hex
GTX100: 8 mm Hex
GTX060: 5 mm Hex
GTX080: 6 mm Hex
GTX100: 8 mm Hex
18 mm Long
25 mm Long
30 mm Long
30 mm Long
40 mm Long
50 mm Long
GTX060: Torque 4.6 Nm (3.4 ft-lbs)
GTX080: Torque 12.2 Nm (9 ft-lbs)
GTX100: Torque 23 Nm (17 ft-lbs)
Figure 4 – Flange mount
8| GTX Installation & Maintenance Instructions Curtiss-Wright | Rev J | PN75557 | 12/19/23
Figure 5 – Tapped face mount
GTX060: 5 mm Hex
GTX080: 6 mm Hex
GTX100: 8 mm Hex
GTX060: 5 mm Hex
GTX080: 6 mm Hex
GTX100: 8 mm Hex
18 mm Long
25 mm Long
30 mm Long
30 mm Long
40 mm Long
50 mm Long
GTX060: Torque 4.6 Nm (3.4 ft-lbs)
GTX080: Torque 12.2 Nm (9 ft-lbs)
GTX100: Torque 23 Nm (17 ft-lbs)
3.2 MOUNTING CONSIDERATIONS
3.2.1 Actuator Alignment
IMPORTANT! Aligning the GTX Series actuator with respect to the load it is moving is critical. Any misalignment will decrease
the life of the actuator’s components and may adversely aect application performance.
CAUTION! Excessive side load on the actuator output rod will dramatically reduce the life of the actuator and should
be avoided. Side load can result from misalignment or loading that is not in line with the actuator output rod.
Side-mounting notes:
GTX Series actuators include threaded holes in the faceplate and endplate. Exlar recommends using hardened fasteners to
mount an actuator to your machine frame with an engagement depth of two times the screw diameter for tapped holes.
IMPORTANT! Tighten four cap screws to 12.24 Nm (9.0 ft-lb) max. Failure to properly tighten the screws can aect normal
operation, damage the actuator and/or cause possible premature actuator failure.
3.2.2 Feedback Device Alignment
Every GTX Series actuator is mounted, aligned and tested using the customer-specied feedback device and amplier (or
an equivalent amplier) to ensure proper feedback alignment and operation. Should an installed feedback device become
misaligned or there is a change in amplier status, contact the Exlar factory to make arrangements to have the alignment
readjusted.
GTX Installation & Maintenance Instructions | 9www.exlar.com | 952.500.6200
3.2.3 Anti-rotation Assembly
To keep the extending rod from rotating, Exlar oers the Anti-rotation Assembly shown in Figure 6.
Figure 6 – Anti-rotation Assembly (shown in standard location)
GTX060: 2.5 mm Hex
GTX080: 2.5 mm Hex
GTX100: 5 mm Hex
Torque 0.6 Nm (0.5 ft-lbs)
Torque 0.6 Nm (0.5 ft-lbs)
Torque 9.5 Nm (7 in-lbs)
GTX060: 4 mm Hex
GTX080: 5 mm Hex
GTX100: 8 mm Hex
Torque 4.6 Nm (3.4 ft-lbs)
Torque 9.5 Nm (7 ft-lbs)
Torque 21.7 Nm (16 ft-lbs)
5 mm Hex
5 mm Hex
6 mm Hex
GTX060: Torque 4.6 Nm (3.4 ft-lbs)
GTX080: Torque 4.6 Nm (3.4 ft-lbs)
GTX100: Torque 12.2 Nm (9 ft-lbs)
10 | GTX Installation & Maintenance Instructions Curtiss-Wright | Rev J | PN75557 | 12/19/23
3.2.4 External Limit Switches
This option allows multiple external switches (sold separately) to be externally mounted to the actuator. These adjustable
switches provide travel indication to the controller. A bracket with inductive proximity switches mounts to the outside low-prole
extrusion and senses a traveling magnet located inside the anti-rotate tube.
Figure 7 – Limit switch mounting
GTX060: 2.5 mm Hex
GTX080: 2.5 mm Hex
GTX100: 5 mm Hex
GTX060: Torque 0.6 Nm (0.5 ft-lbs)
GTX080: Torque 0.6 Nm (0.5 ft-lbs)
GTX100: Torque 9.5 Nm (7 ft-lbs)
GTX060: 4 mm Hex
GTX080: 5 mm Hex
GTX100: 8 mm Hex
5 mm Hex
5 mm Hex
6 mm Hex
Torque 4.6 Nm (3.4 ft-lbs)
Torque 9.5 Nm (7 ft-lbs)
Torque 21.7 Nm (16 ft-lbs)
GTX060: Torque 4.6 Nm (4 ft-lbs)
GTX080: Torque 4.6 Nm (4 ft-lbs)
GTX100: Torque 12.2 Nm (9 ft-lbs)
GTX060: 5 mm Hex
GTX080: 5 mm Hex
GTX100: 5 mm Hex
Washer
Washer
Magnet
GTX060: Torque 4.6 Nm (4 ft-lbs)
GTX080: Torque 4.6 Nm (4 ft-lbs)
GTX100: Torque 4.6 Nm (4 ft-lbs)
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