Newport TRB Series Compact Motorized Actuators User Manual

: June 8, 2024
: NEWPORT

Newport TRB Series Compact Motorized Actuators User

Manual

Warranty

Newport Corporation warrants this product to be free from defects in material and workmanship for a period of 1 year from the date of shipment. If found to be defective during the warranty period, the product will either be repaired or replaced at Newport’s discretion.
To exercise this warranty, write or call your local Newport representative, or contact Newport headquarters in Irvine, California. You will be given prompt assistance and return instructions. Send the instrument, transportation prepaid, to the indicated service facility. Repairs will be made and the instrument returned, transportation prepaid. Repaired products are warranted for the balance of the original warranty period, or at least 90 days. Limitation of Warranty
This warranty does not apply to defects resulting from modification or misuse of any product or part.

CAUTION

Warranty does not apply to damages resulting from:

Incorrect usage:
– Driven load greater than maximum specified load.
– Actuator speed higher than specified speed.
– Improper grounding.
¬ Connectors must be properly secured.
¬ When the load on the stage represents an electrical risk, it mustbe connected to ground.
– Excessive or improper cantilever loads.
Modification of the actuator or any part thereof

This warranty is in lieu of all other warranties, expressed or implied, including any implied warranty of merchantability or fitness for a particular use. Newport Corporation shall not be liable for any indirect, special, or consequential damages.

© 2018 by Newport Corporation, Irvine, CA. All rights reserved. Original instructions.
No part of this document may be reproduced or copied without the prior written approval of Newport Corporation. This document is provided for information only, and product specifications are subject to change without notice. Any change will be reflected in future publishings.

Introduction

This manual provides operating instructions for the actuator that you have purchased in the TRB Series:

TRB-CC
TRB-PP

RECOMMENDATION

We recommend you read carefully the chapter “Connection to electronics” before using the TRB actuator

The TRB series miniature motorized actuators are the latest addition to Newport’s extensive range of precision positioning devices. They provide reliable motorized motion in a lightweight and very compact package. The cable output on the side allows a large application compatibility with actuators of the old CMA series.

The TRB actuators incorporate an excellent space saving design that allows them to be used with a wide variety of linear stages, mirror mounts, and OEM applications.

TRB6 and TRB25 models provide respectively 6 mm and 12 mm travel in a slim, only 15 mm diameter housing and are the recommended choice for motorizing Ultima or Suprema mirror mounts, 561 series linear stages, and 481 and RS65 rotation stages. They are also mechanical compatible with other Newport mechanical products, but due to the limited travel range of the actuator, the total travel range provided by the mechanic may not be achievable accessible.

The TRB25 provides 25 mm travel in a slightly larger package and is the recommended choice for motorizing linear stages and other devices.

To provide the best fit for your application’s requirements, all TRB actuators are available in open-loop stepper and closed-loop DC servo motor versions.

To protect your investment, the TRB actuators include fixed integrated optical limit switches. These highly reliable switches also provide also a method for repeatable referencing/homing, for instance after shut-downs, for example.

2.1 Design Details

Base Material Stainless steel body
Drive Mechanism Rolled lead screw
Drive Screw Pitch (mm) 1
Reduction Gear TRB-CC:1÷67.5
TRB-PP: 1÷256
Feedback TRB-CC: Motor mounted rotary encoder, 1024 cts/rev.
TRB-PP: Open loop (no encoder)
Limit Switches Optical switches, both ends
Origin Uses minimum travel limit for homing, typically <4 µm repeatability Motor CC: DC servo motor
PP: 2-phase stepper motor, 20 steps/rev

Definitions

Specifications of our products are established in reference to ISO 230 standard part II “Determination of accuracy and repeatability of positioning numerically controlled axes”.
This standard gives the definition of position uncertainty which depends on the 3 following parameters:
Absolute Accuracy
Difference between ideal position and real position.
Accuracy
Difference between ideal position and real position after the compensation of linear errors.
Linear errors include: cosine errors, inaccuracy of screw or linear scale pitch, angular deviation at the measuring point (Abbe error) and thermal expansion effects. All Newport motion electronics can compensate for linear errors.
The relation between absolute accuracy and on-axis accuracy is as follows:
Absolute Accuracy = Accuracy + Correction Factor x Travel
Repeatability
Ability of a system to achieve a commanded position over many attempts.
Reversal Value (Hysteresis)
Difference between actual position values obtained for a given target position when approached from opposite directions.
Minimum Incremental Motion (MIM or Sensitivity)
The smallest increment of motion a device is capable of delivering consistently and reliably. Resolution
The smallest increment that a motion device can theoretically move and/or detect. Resolution is not achievable, whereas MIM, is the real output of a motion system.
The testing of accuracy, repeatability, and reversal error are made systematically with test equipment in controlled environment (20 ±1 °C).
A linear cycle with 21 data points on the travel and 4 cycles in each direction gives a total of 168 points

Guaranteed and Typical Specifications
Guaranteed maximum performance values are verified per Newport’s A167 metrology test procedure. For more information, please consult the metrology tutorial section in the Newport catalog or at www.newport.com

Mechanical Specifications

TRB-CC TRB-PP

Travel Range (mm) 6; 12; 25 6; 12; 25
Minimum Incremental Motion (µm) 0.1 0.1
Uni-directional Repeatability, Typical (Guaranteed) (µm) ±0.08 (±0.25) ±0.08 (±0.25)
Bi-directional Repeatability with Compensation, Typical (Guaranteed) (1) (2) (µm) ±0.15 (±0.75) ±0.15 (±0.75)
Accuracy (1), Typical (Guaranteed) (µm) TRB6: ±2.0 (±3.0) ±2.0 (±3.0)
TRB12: ±2.0 (±4.0) ±2.0 (±4.0)
TRB25: ±2.0 (±5.0) ±2.0 (±5.0)
Maximum Speed (3) (mm/s) 2 0.3
Axial Load Capacity [-Cx, +Cx] (N) -90, +0 -90, +0

For the definition of Typical and Guaranteed specifications see “Motion Basics Terminology & Standards” Tutorial at www.newport.com\
Backlash value is provided with each actuator.
__For axial loads over 60 N, the max. speed must be reduced to 1 mm/s for the TRB-CC and kept to 0.3 mm/s for the TRB-PP.

Load Specification Definitions The maximum speed of a TRB actuator depends on a number of factors:
If a TRB-CC actuator is user with an axial load higher than 60 N , the speed must be limited to 1 mm/s.
Actuator Weights

Weights indicated are values for actuators with their cable. Weight [lb (kg)] ____TRB6 to TRB25 1.32 (0,6) _
_The weight difference between TRB versions is not significant.

Command Signals for the Stepper Motor

DC-Motor Drive Version

One DC-motor-driven configuration is available: TRB-CC.
DC-Motor Performance Specifications and Characteristics

| Resolution| Speed| Nominal| Max RMS| Max. Peak| Resistance| Inductance| Tachometer
---|---|---|---|---|---|---|---|---
(µm)| (mm/s)| Voltage (V)| Current (A)| Current (A)| (W)| (mH)| Const. (V/krpm)
TRB-CC| 0.01447| 2 (1)| 7.2| 0.25| 0.5| 14.1| 0.356| –

Command Signals for the DC-Motor

In the above drawings, + Motor signal is referred to – Motor signal.
① When the actuator moves in + Direction, the + Motor voltage is higher than – Motor voltage.
⑤ When the actuator moves in – Direction, the + Motor voltage is lower than – Motor voltage

Sensor Position

End-of-Run are 5 V open collector type.

Sensor Position

The incremental sensor consists of an optical scale and an encoder head.
When the carriage moves, the encoder head generates square signals in quadrature and sends to pins #19, #20, #23 and #24 of the SUB-D25\ connector.

“Encoder” are “differential pair” (type RS-422) type output signals. Using these signals permits a high immunity to noise. Emission circuits generally
used by Newport are 26LS31 or MC3487. Reception circuits to use are 26LS32 or MC3486.

Pinouts

The pinout diagrams for the TRB actuators SUB-D25M connector are shown below.

1) Pin #13 of SUB-D25M is reserved for internal logic for Newport controller.

Connection to Newport Controllers

Warnings on Controllers

Controllers are intended for use by qualified personnel who recognize shock hazards and are familiar with safety precautions required to avoid possible injury. Read the controller user’s manual carefully before operating the instrument and pay attention to all written warnings and cautions.

WARNING

Disconnect the power plug under the following circumstances:

If the power cord or any attached cables are frayed or damaged in any
If the power plug is damaged in any
If the unit is exposed to rain, excessive moisture, or liquids are spilled on the
If the unit has been dropped or the case is
If you suspect service or repair is
Whenever you clean the electronics

CAUTION

To protect the unit from damage, be sure to:

Keep all air vents free of dirt and
Keep all liquids away from the
Do not expose the unit to excessive moisture (85% humidity).
Read this manual before using the unit for the first

WARNING

All attachment plug receptacles in the vicinity of this unit are to be of the grounding type and properly polarized.
Contact your electrician to check your receptacles.

WARNING

This product is equipped with a 3-wire grounding type plug.
Any interruption of the grounding connection can create an electric shock hazard.

If you are unable to insert the plug into your wall plug receptacle, contact your electrician to perform the necessary alterations to ensure that the green (green-yellow) wire is attached to earth ground.

WARNING

This product operates with voltages that can be lethal
Pushing objects of any kind into cabinet slots or holes, or spilling any liquid on the product, may touch hazardous voltage points or short out parts.

Connection

There is a label on every actuator indicating its part and serial numbers.

WARNING

Always turn the controller’s power OFF before connecting to a stage.

NOTE

These actuators are ESP compatible. Enhanced System Performance is Newport’s exclusive technology that enables Newport ESP motion controllers to recognize the connected Newport ESP stage and upload the stage parameters. This ensures that the user can operate the motion system quickly and safely.

Cables

All TRB series actuators are equipped with a pigtailed cable and a SUB-D25M connector for direct connection to Newport Controllers.
Cable length: 1.5 meter
Cable size: Dia. 3.7 mm
Min. bending radius: static only 18.5 mm

WARNING

This cable is shielded correctly. For a correct operation, make sure to lock connectors (ground continuity provided by the cable).

WARNING

Keep the motor cables at a safe distance from other electrical cables in your environment to avoid

WARNING

Newport guarantees “ ” compliance of TRB actuators only if used with Newport cables and controllers.
It is the customer’s responsibility to modify the cable and take care of sensor signal connections, when using the stage with non-Newport ontrollers.
End-of-Runs are open collector type with a 5.6 V protective Zener diode