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Related Manuals for THORLABS GVS001
Summary of Contents for THORLABS GVS001
- Page 1 GVS001 and GVS002 GVS101 and GVS102 GVS201 and GVS202 Small Beam Diameter Scanning Galvo Systems User Guide Original Instructions HA0193T...
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Page 2: Table Of Contents
Single and Dual Axis Scanning Galvo Systems for Small Beam Diameters Table of Contents Chapter 1 Safety Information ..................... 1 Chapter 2 Overview ......................3 2.2.1 Introduction ..............................3 2.2.2 The Galvanometer ............................. 3 2.2.3 The Mirror ..............................4 2.2.4 Servo Driver Board ............................ - Page 3 Chapter 7 Calculating the Power Dissipation ..............26 7.1.1 Calculating the Required Thermal Conductivity .................. 26 Chapter 8 Reasons for Image Distortion ................ 27 Chapter 9 Certifications and Compliance ..............28 Chapter 10 Thorlabs Worldwide Contacts ............... 29 HA0193T...
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Page 4: Chapter 1 Safety Information
Single and Dual Axis Scanning Galvo Systems for Small Beam Diameters Chapter 1: Safety Information Chapter 1 Safety Information For the continuing safety of the operators of this equipment, and the protection of the equipment itself, the operator should take note of the Warnings, Cautions and Notes throughout this handbook and, where visible, on the product itself. - Page 5 Single and Dual Axis Scanning Galvo Systems for Small Beam Diameters Chapter 1: Safety Information Caution The driver circuit board is shipped calibrated and ready for use. The only adjustments necessary are setting the Volts/Degree Scaling factor (see section 3.4.5 and if required, setting the device for external enabling see section 4.2).
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Page 6: Chapter 2 Overview
A choice of mirror coating is available as follows: GVS001 and GVS002: Single- and Dual-Axis Systems with Protected Silver Mirrors GVS101 and GVS102: Single- and Dual-Axis Systems with Protected Gold Mirrors GVS201 and GVS202: Single- and Dual-Axis Systems with 400-750 nm Broadband Dielectric Mirrors Typical applications include laser scanning, laser microscopy, and laser marking. -
Page 7: The Mirror
Single and Dual Axis Scanning Galvo Systems for Small Beam Diameters Chapter 2: Overview Figure 2 GVS002 Dual Axis Galvo/Mirror Assembly Our galvo motor features a moving magnet, which means that the magnet is part of the rotor and the coil is part of the stator. -
Page 8: Servo Driver Board
Single and Dual Axis Scanning Galvo Systems for Small Beam Diameters Chapter 2: Overview Figure 3 Mirror Assembly Detail 2.2.4 Servo Driver Board The servo circuit interprets the signals from the position detector, then uses positional error, speed and integral of current terms to output control voltages to drive the actuator to the demanded position. The scanner uses a non-integrating, Class 0 servo, which enables higher system speeds compared to integrating servo systems and is ideal for use in applications that require vector positioning (e.g., laser marking) or raster positioning (printing or scanning laser microscopy). -
Page 9: Chapter 3 Installation And Initial Setup
Single and Dual Axis Scanning Galvo Systems for Small Beam Diameters Chapter 3: Installation and Initial Setup Chapter 3 Installation and Initial Setup Environmental Conditions Warning Operation outside the following environmental limits may adversely affect operator safety. The unit is designed for indoor use only. To ensure reliable operation, the unit should not be exposed to corrosive agents or excessive moisture, heat, or dust. -
Page 10: Single Axis Mount Dimensions
Single and Dual Axis Scanning Galvo Systems for Small Beam Diameters Chapter 3: Installation and Initial Setup 3.2.3 Single Axis Mount Dimensions Figure 8 Single Axis Mounting Bracket Dimensions Rev. 25, July 17, 2023 Page 7... -
Page 11: Xy Mount Dimensions
Single and Dual Axis Scanning Galvo Systems for Small Beam Diameters Chapter 3: Installation and Initial Setup 3.2.4 XY Mount Dimensions Figure 9 XY Mounting Bracket Dimensions 3.2.5 Heatsink Dimensions Figure 10 Heatsink Dimensions Page 8 ETN013002-D02... -
Page 12: Servo Driver Board Baseplate Dimensions
If the accuracy of the system is in doubt, e.g., due to accidental adjustment of trim pots, contact Thorlabs for information on the tuning procedure. Do not extend the cables as this will affect the system calibration. -
Page 13: Fitting The Heatsinks
Single and Dual Axis Scanning Galvo Systems for Small Beam Diameters Chapter 3: Installation and Initial Setup Figure 12 Serial Number Label location It is essential that the user mounts heatsinks to the driver board and motor mounts which are suitable for their intended application. -
Page 14: Typical System Setup
For most applications, the mounting bracket will provide adequate heat sinking, however for more vigorous applications, it may be necessary to fit some heatsinking in addition to the galvo motor mount. Thorlabs supply a combined post adapter and heatsink (GHS003) suitable for both single and dual axis applications. -
Page 15: Choosing A Power Supply
3.4.1 Choosing a Power Supply Thorlabs recommends using the GPS011 linear power supply to power the galvo controller board(s) as this power supply has been specifically designed for this purpose. The GPS011 can power up to two driver cards under any drive conditions and is supplied with all the cables required to connect to the driver cards. -
Page 16: Electrical Connections
PCB revisions can be identified as follows: Up to and including issue 10. Steps (1) to 3) are applicable only if using the Thorlabs GPS011 PSU. 1. Ensure the correct voltage range is selected on the PSU. Refer section 3.4.2. - Page 17 Figure 18 Connector Identification 4. Identify connector J10 on each driver board and make power connections as shown below. Thorlabs supply a suitable PSU (GPS011) for powering a single or dual axis system (refer section 3.4.1). A bare cable, crimp connectors (Molex Pt No 2478) and housings for use with general lab PSUs is supplied with each driver board.
- Page 18 Single and Dual Axis Scanning Galvo Systems for Small Beam Diameters Chapter 3: Installation and Initial Setup Figure 19 J10 power Connector Pin Identification Caution During items (5) and (6) use only the cables supplied. Do not extend the cables. The driver boards and motors are calibrated with these cables.
- Page 19 Single and Dual Axis Scanning Galvo Systems for Small Beam Diameters Chapter 3: Installation and Initial Setup 7. Connect the command input (e.g., function generator) to J7 of each driver board as shown in Figure 22. J7 accepts Molex pins Pt No 56134-910 Note The scanner accepts a differential analog command input.
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Page 20: Diagnostic Signal Descriptions
Single and Dual Axis Scanning Galvo Systems for Small Beam Diameters Chapter 3: Installation and Initial Setup Example Vendor: Farnell, Vendor P/N: 1120545 Crimps (22-28AWG): Manufacturer: Molex, Mfr. P/N: 56134-9100 Example Vendor: Farnell, Vendor P/N: 1120546 3.4.4 Diagnostic Signal Descriptions Scanner Position - This signal is proportional to the position of the scanner mirror, with a scaling of 0.5 Volts per degree of mechanical movement. -
Page 21: Chapter 4 Operation
Single and Dual Axis Scanning Galvo Systems for Small Beam Diameters Chapter 4: Operation Chapter 4 Operation General Operation Perform the following installation steps: 1. Connect the system as described in section 3.4. 2. Apply power to the driver boards. 3. - Page 22 Lastly, on dual-axis systems, there is an offset alignment between the X and Y axis mirrors that also limits the scan angle. The table below gives recommended scanning angles for various beam diameters. GVS001, GVS101, and GVS201 Input Beam Diameter Mechanical Scan Angle...
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Page 23: Chapter 5 Troubleshooting
Single and Dual Axis Scanning Galvo Systems for Small Beam Diameters Chapter 5: Troubleshooting Chapter 5 Troubleshooting Common Issues Some of the more common problems encountered when using galvanometers are details below More fails to respond to the command signal due to several reasons. The most common are: 1. - Page 24 Single and Dual Axis Scanning Galvo Systems for Small Beam Diameters Chapter 5: Troubleshooting Oscillation in the galvo motor current If the galvo system is drawing more current than expected, if the scanners or the driver cards are overheating, if the scanners are making a hissing noise or if the position accuracy is less than expected, this may be due to oscillations in the galvo motor current.
- Page 25 Single and Dual Axis Scanning Galvo Systems for Small Beam Diameters Chapter 5: Troubleshooting Action Taken by Fault Control Fault Possible Causes Circuit Drive signal too large, Maximum scanner position exceeded Power amplifier turned off instability of scanner Incorrect tuning, instability of the scanner or overly vigorous Power amplifier turned off Maximum peak current exceeded...
- Page 26 Temperature affects the time protection: at low temperatures the protection trip occurs later than it does at high temperatures. Please contact Thorlabs if the fuse trips continuously: the motor or the board might have issues. Error codes The shut down time of the board is the error code.
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Page 27: Chapter 6 Specifications And Associated Parts
Max power bandwidth is measured with a 20Vpp sinewaves when the output swing drops of -3dB on the Y axis. Drive Electronics The way our mirrors are tested is continually updated, please consult www.thorlabs.com for more information. Page 24 ETN013002-D02... - Page 28 Item # Part Number 2D Galvo System - Protected Silver Mirrors GVS002 1D Galvo System - Protected Silver Mirror GVS001 2D Galvo System - Protected Gold Mirrors GVS102 1D Galvo System - Protected Gold Mirror GVS101 2D Galvo System - Broadband E02 Mirrors...
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Page 29: Chapter 7 Calculating The Power Dissipation
Single and Dual Axis Scanning Galvo Systems for Small Beam Diameters Chapter 7: Calculating the Power Dissipation Chapter 7 Calculating the Power Dissipation Motor Heatsink The power dissipated in the motor can be estimated by measuring the RMS current drawn from the PSU and then using the following equation: x [(I ) / 2]... -
Page 30: Chapter 8 Reasons For Image Distortion
Single and Dual Axis Scanning Galvo Systems for Small Beam Diameters Chapter 8: Reasons for Image Distortion Chapter 8 Reasons for Image Distortion The deflection of a laser beam with a two-mirror system results in three effects: (1) The arrangement of the mirrors leads to a certain distortion of the image field – see Figure 28 below. Figure 28 Field Distortion in a Two-way Mirror Deflection System This distortion arises from the fact that the distance between mirror 1 and the image field depends on the size... -
Page 31: Chapter 9 Certifications And Compliance
Single and Dual Axis Scanning Galvo Systems for Small Beam Diameters Chapter 9: Certifications and Compliance Chapter 9 Certifications and Compliance Page 28 ETN013002-D02... -
Page 32: Chapter 10 Thorlabs Worldwide Contacts
Single and Dual Axis Scanning Galvo Systems for Small Beam Diameters Chapter 10: Thorlabs Worldwide Contacts Chapter 10 Thorlabs Worldwide Contacts For technical support or sales inquiries, please visit us at for our most up-to-date www.thorlabs.com/contact contact information. USA, Canada, and South America UK and Ireland Thorlabs, Inc. - Page 33 www.thorlabs.com...
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