THORLABS GCM102 User manual

HA 0371T
GCM102(/M)
30 mm Cage System Mount
For Small Beam Diameter Galvos
User Guide
Original Instructions

GCM102(/M) 30 mm Cage System Mount for GVSx02 Series Galvos
Contents
Chaper 1 Overview ..................................................................................................... 1
1.1 Description ......................................................................................... 1
Chaper 2 Safety .......................................................................................................... 2
2.1 Safety Information ............................................................................. 2
Chaper 3 Installation .................................................................................................. 3
3.1 Installing the Galvo Motors ............................................................... 3
3.2 Fitting the Optics and Adapters ....................................................... 8
3.3 Using the Cage Mount with Other Equipment ............................... 11
3.3.1 Mounting to a 1.5” Diameter Post ......................................................... 11
3.3.2 Mounting to 66 mm Rail Components .................................................. 12
Chaper 4 Thorlabs Worldwide Contacts ................................................................ 14

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Chapter 1 Overview
Chapter 1 Overview
1.1 Description
The GCM102(/M) cage system adapter is used to mount the GVSX02 dual-axis galvo
systems into a 30 mm cage system. The galvo motors can be fitted and aligned
without dismantling the mount
On the beam input side, the mount features SM1 and SM05 threads for mounting lens
tubes. The output side is threaded SM2, which can be converted to M25 x 0.75 by
fitting the GCMA1 or SM2A33 adapters. The mounting face features an array of M6,
M4 and M3 (1/4-20, 4-40 and 8-32 UNC) threaded holes for use in mounting to our
range of 1.5 OD posts, and XT66 construction rails.
Note: The input and output beams are on different planes. Cage systems should be
adapted accordingly.
Fig. 1.1 GCM102 Cage Mount, post mounted with lens and cage rods fitted

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GCM102(/M) 30 mm Cage System Mount for GVSx02 Series Galvos
Chapter 2 Safety
2.1 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.
The following safety symb ols may be used throughout the handbook and on the
equipment itself.
Warning: Risk of Electrical Shock
Given when there is a risk of injury from electrical shock.
Warning
Given when there is a risk of injury to users.
Caution
Given when there is a risk of damage to the product.
Note
Clarification of an instruction or additional information.

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Chapter 3 Installation
Chapter 3 Installation
3.1 Installing the Galvo Motors
1) Using a 2.5 mm hex key, loosen the pinch bolts on the existing mount, and remove
the motor/mirror assemblies. Leave the spacers fitted to the motors and retain the
insulating film for later use. Take care not to touch the mirror surfaces.
2) Once removed, check that the the rmal insulation film is u ndamaged. Damaged
material should be discarded. Replacement film is supplied with the cage mount.
Fig. 3.1 Removing Motor/Mirror Assemblies
3) Using a 3 mm (1/8”) hex key, remove the blanking plugs from the body of the
GCM102(/M) Cage Mount, to gain access to the motor clamp.
Using a 2mm ( 5/64”) hex key, loosen the clamp bolts.
Fig. 3.2 Loosening the motor clamp bolts
Removing the blanking plugs Loosening the motor clamp bolts

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GCM102(/M) 30 mm Cage System Mount for GVSx02 Series Galvos
4) Position the cage mount assembly as shown in Fig. 3.3 and using a 2 mm (5/64”)
hex key, remove the screws securing the small gasket cover. Remove the gasket
cover, then remove the screws securing the large gasket cover.
Fig. 3.3 Removing the Gasket Covers
5) Position the cage mount assembly as shown in Fig. 3.4 and using a 2 mm (5/64”)
hex key, remove the remain ing screws se curing the large gasket cover, then
remove the gasket cover.
Fig. 3.4 Removing the Gasket Covers
6) Position the cage mount as shown in Fig. 3.5, with the fixed side of the gasket to
the left. Slide the large spacer underneath the gasket then pull the gasket over the

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Chapter 3 Installation
spacer such that it pushes through the hole in the gasket, and the gasket fits tights
around the sides of the spacer..
Fig. 3.5 Inserting the Large Spacer
7) Reposition the cage mount as shown in Fig 3.6, and in sert the small spa cer
underneath the gasket. Pull the gasket over the spacer such that it pushes through
the hole in the gasket, and the gasket fits tights around the sides of the spacer.
Fig. 3.6 Inserting the Small Spacer

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GCM102(/M) 30 mm Cage System Mount for GVSx02 Series Galvos
8) Roll up the thermal insulation film into a small tube shape and insert into the motor
mounting holes as shown below. Ensure the film is pushed fully into the hole.
Fig. 3.7 Fitting the thermal insulation film
9) Place the cage adapter body on the worksurface as shown below, with the
engraving on the left, and the large open face facing away and to the right.
Fig. 3.8 Inserting the Motors
10) Identify the X-Axis motor assembly. This is the motor with the smallest mirror and
the serial number label has a suffix ‘-X’.
11) Insert the motor into the lower mount on the left hand side - see Fig. 3.8 Detail A.
Caution. Ensure that the wide spacer and the thermal insulation detailed
previously are fitted. The X-axis mirror will be misaligned without the wide
spacer. The clamp pinch bolts will not tighten sufficiently without the
thermal insulation material.
Gently twist the motor bod y as it is pu shed into the clamp, ta king care not to
damage the thermal insulation material.
Detail A Detail B

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Chapter 3 Installation
12) Ensure that the narrow plastic spacer removed at item (1) is fitted to the remaining
mounting hole, then insert the Y-axis motor into the upper mount on the right hand
side- see Fig. 3.8 Detail B.
Caution. Ensure that the thermal insulation detailed at item (4) is fitted. The
clamp pinch bolts will not tighten sufficiently without this material.
Gently twist the motor bo dy as it i s pushed into the clamp, taking care not to
damage the thermal insulation material.
13) Ensure that th e motors are pushed fully into the moun ting holes, then turn the
motors to be aligned as shown in Fig. 3.9. The left hand (X-Axis) motor connector
should point to the right hand side. The right hand (Y-Axis) connector should point
downwards. Check through the large open face that the mirror ali gnment is as
shown below.
Fig. 3.9 Aligning the motors
14) Using a 2 mm (5/64”) hex key, tighten the pinch bolts on the clamps as shown below.
Fig. 3.10 Tightening the pinch bolts
15) Using a 3 mm (1/8”) hex key, refit the blanking plugs.
16) The system is now ready to be m ounted into a cage system, however further
adjustment of the motor posi tions may be nece ssary to fine tune the mirror
alignment within the application.

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GCM102(/M) 30 mm Cage System Mount for GVSx02 Series Galvos
3.2 Fitting the Optics and Adapters
A range optics can be fitted to the GCM102(/M) using various adapters as detailed
below.
Fig. 3.11 Fitting the LSM02
Optic Thread Scan Distance
(mm)
Distancefrom
start of SM2
thread (mm) Adapter Required
LSM02 M25 x 0.75 16 3 GCMA1
LSM03 M25 x 0.75 19 6 GCMA1 (reverse fitted)
LSM04 M25 x 0.75 19 6 GCMA1 (reverse fitted)
LSM03-VIS M25 x 0.75 29 16 SM2A33 and SM2L03
LSM05 SM2 75 62 SM2L20
CLS-SL SM2 58 46 SM2L05 and SM2V05
Distance from
input axis to
reference face
of lens
11.0 mm (0.43”)
GCMA1
screwed down to
bottom face