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THORLABS ELL14 User Manual

THORLABS ELL14
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ELL14 Motorized SM1 Optic Rotator Chapter 1: Introduction
Rev. B, Feb 2020 Page 1
Chapter 1 Introduction
The ELL14 is part of the Thorlabs series of resonant piezo motor circuits and bare modules for OEM applications. This SM1-
threaded Optics Rotator can be adapted to 30 and 60 mm cage systems and can also be adapted for post mounting see
section 3.1 for more details.
The resonant piezo design of these motors offers fast response times and precise positioning and is therefore particularly useful
in scanning applications.
The high-speed digital signal processing (DSP) architecture supports a multi-drop serial communication protocol, and a set of
digital IO lines allows the user to control the movement and state manually by switching the lines high (5V) or low (0V).
The rotator features a central SM1-threaded aperture to accept an optic, and delivers a travel range of 720° rotation. The angular
position is requested and displayed from 0 to 359.99°. If a rotator is driven past the 359.99° rotation point, the display reverts
back to zero and counts up to 359.99° again. Furthermore, the unit will not respond to requests for a move to a position greater
than 359.99° and an error message will be generated. It is designed for closed loop applications requiring rotational positioning
with 44.0 µrad of resolution.
Homing is achieved using a combination of a reflecting optical sensor (IR) for coarse (0.5 to 1.0 mm) positioning, then a magnetic
sensor for fine (1.0 µm resolution) positioning. Using the ELLO software, the user can modify the offset value to shift the homing
position (up to a ¼ of turn). Furthermore, coarse homing can be selected in a clockwise (CW) or counter clockwise (CCW)
direction (fine homing is always performed in a CCW direction to guarantee repeatability).
Note
The module must be powered via an external 5V power supply. A suitable PSU is supplied in the kit. For customers
wanting to use a third party PSU, the Connector on the interface board is a DC Jack connector, 6.3mm OD (GND),
2.1mm ID (+5V).
A hand-held controller is supplied with the ELL14K evaluation kit to allow homing and manual jogging and/or positioning. The
unit can also be driven remotely via PC-based software, downloaded from
www.thorlabs.com. A compatible USB driver and
source code are included in the software download package.

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THORLABS ELL14 Specifications

General IconGeneral
BrandTHORLABS
ModelELL14
CategoryLaboratory Equipment
LanguageEnglish

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