SCx20 EN Rev12 PDF
SCx20 EN Rev12 PDF
SCx20 EN Rev12 PDF
ROFIN SC x20
Please note that while every effort has been made to ensure that the data given
in this document is accurate, the information, figures, illustrations, tables,
specifications and schematics contained herein are subject to change without
notice. The most recent additions and supplementary information is given in the
Additional Information Section – Appendix 2.
Rofin-Sinar UK Ltd.
York Way
Willerby
Kingston upon Hull
U.K. HU10 6HD
August 2002
It is strongly recommended that any personnel who are involved with the
installation, operation or maintenance of this laser equipment should first
read and fully understand the contents of this manual and in particular
Section 1 on Safety Instructions and Precautions.
If there are any questions or doubts on any of the safety aspects of the
equipment, then do not hesitate to contact your nearest ROFIN sales or
service office or distributor for advice before proceeding.
Strict compliance with the safety precautions set out and referred to in this
manual and extreme care in use are essential to minimise the chance of
accidental damage to the equipment or personal injury. ROFIN does not
accept liability for any damage or injury howsoever caused or arising.
The symbol given on the left is also used on the equipment and indicates
that the user should refer to the Equipment Operator’s Manual for more
information on the safe operation or installation of the equipment.
d) The average output power, peak power per pulse, the pulsed
frequency, the wavelength of the radiation and other specifications for
the particular carbon dioxide (CO2) laser covered by this manual can
be found in the Technical Specification in Section 2.
The use of the laser equipment for applications other than the
intended one constitutes misuse and the laser manufacturer, ROFIN,
does not accept liability for any damage or injury howsoever caused
or arising.
In addition, ROFIN does not accept liability for any damage or injury
howsoever caused or arising where the laser equipment has been
modified without the prior written permission of Rofin-Sinar UK Ltd.
Do not use the laser beam to heat foodstuffs as this may cause injury
and can produce poisonous substances, fumes or vapours.
1.4 Training
i) Ensure that operators are given regular safety instruction (at least
once per year) and have read and understood this manual.
ii) Ensure that operators have a copy of this safety information for easy
reference.
iii) Observe all accident prevention regulations that are in force in the
work place.
iv) Attach the correct hazard warning plates and labels to the laser
equipment.
v) Ensure that untrained or unauthorised personnel do not have access
to the laser system.
vi) Ensure that the ‘laser designated area’ is properly marked out and
labelled.
vii) Combustible or flammable gases, liquids or solids can ignite when
irradiated with the laser beam. Remove any such materials from the
laser designated area.
viii) Some materials, such as metals or plastics, can give off toxic
decomposition products when processed using the laser beam.
Investigate the hazards associated with the materials that are being
processed. Professional bodies can provide this information.
ix) Ensure that all objects which may accidentally reflect the laser beam
are removed from the laser designated area.
The wavelength of the output beam from a Carbon Dioxide (CO2) laser can
be in the range 9.3µm to 11.5 µm. The wavelength range is invisible to the
human eye and is in the infra-red part of the electromagnetic spectrum.
CO2 laser radiation can be reflected from smooth metallic surfaces, even
though they may be blackened.
CO2 laser radiation can be focused with lenses in order to be useful for
cutting or marking applications. Beyond the focal point the laser beam
rapidly diverges, causing dissipation of the energy density or intensity of
the beam.
i) Eye Protection
If laser radiation enters the eye, even after reflection from a metal
object, it can burn the surface of the eye causing permanent damage.
Because the CO2 laser beam is highly absorbed by water, the cornea
and the sclera are the predominant ocular structures at risk for injury
and may suffer irreversible damage and scarring as a result of direct
or indirect exposure to the CO2 laser beam. Severity of injury to these
structures depends on how concentrated or diffuse the beam is and
the length of exposure time.
5. Never look directly into the carbon dioxide laser light source or
scattered laser light from reflective surfaces.
If laser radiation is exposed to the skin it can burn and cut the flesh
causing temporary or permanent damage.
The following precautions are pertinent for protection from 9.3 - 11.5
micron (µm) wavelength CO2 laser energy only.
1. Do not place hands or any other object in the pathway of the CO2
laser beam.
3. Metallic objects will reflect the CO2 laser beam. Blackened metallic
objects may also be reflective to the laser beam. Objects that are
brushed or dimpled will diffuse the laser beam. Items that absorb
the laser beam will become hot.
Combustible objects which are placed in the laser beam path can be
set on fire.
4. Ensure the laser system is installed with the correct level of safety
interlocking.
The laser beam provides the user with a ‘hot’ beam that can be used as a
controlled method of heating or burning the surface of certain materials –
like a very fine flame torch.
Some materials break down chemically when they are heated and these
materials can emit hazardous fumes in the form of gases or particulate
matter eg. polyvinyl chloride (PVC) and polycarbonate.
2. The area around the laser and its power supplies should be kept
dry.
i) Safety Interlocks
In addition, the end user will also be required to add the following functions
within a full system installation to meet the CDRH, EN60825, Machinery
Directive EN89/392/EEC (EN60204 and EN292) and NFPA 79 safety
standards:
It is also recommended that the end user adds the facility for a power
on/off key switch, such that the system can be switched off and the
key removed when the laser in not in operation.
Except for the laser warning symbol, which has no written words, all
labels are written in the language specified by the user. Reproductions
of these labels and their positions are given in Appendix 1.
General Description
Figure 2.0-1 shows the principle of operation of the Slab laser. A laser gas
discharge (active zone) (8) is established between the waveguiding
electrodes (9) by a radio frequency voltage (5, 10). The rear mirror (7) and
output mirror (3) form the optical resonator. The laser beam (1) is produced
within the resonator and is emitted through a window (2). Water (4, 6) is
used to cool the electrodes.
Due to the nature of the electrodes in a slab laser, the emitted laser beam
diverges at different rates in the x (free space) and the y (waveguide)
directions. In order to make the beam round it is necessary to reshape the
output beam using reflective correction optics. This can be achieved by
using single optical elements or the combination of cylindrical and
spherical optics.
After beam correction and spatial filtering the beam quality from a slab
laser is ideal for any material processing operation that requires excellent
mode quality and stability.
Figure 2.1-1 shows the layout of the inside of the laser head housing. After
exiting the Laser Tube (1), the laser beam is turned through 45 degrees by
a plane turning mirror and is directed into the Beam Correction Module (2).
Inside the Beam Correction Module, a second plane turning mirror directs
the laser beam towards an angled spherical reflective element, which
corrects the shape of the beam to make it round and also focuses the
beam into the spatial filter. The spherical mirror then deflects the beam
towards a plane mirror, which directs the beam into the Spatial Filter
Module (3).
The Spatial Filter scrapes off any unwanted secondary lobes on the laser
beam. After exiting the Spatial Filter the beam enters the Safety Shutter
Module (4). The Safety Shutter is used to block off any unwanted laser
output using a rotary solenoid and a reflective blade. When in place, the
Safety Shutter deflects the beam into a thermal dump.
When the laser beam exits the Safety Shutter Module it is directed towards
the Final Output Window (5). Depending on the specific requirements of
the customer, this transmissive element can be either a plane window or a
lens.
The Laser Tube, Spatial Filter and Shutter Module are all water cooled and
the water flow is monitored by a Flow Switch (6).
Power Stability: ± 7%
Weight: 43.5kg
Polarisation: Linear
(perpendicular to base of laser head)
c) RF Power Supply
Weight: 14.5kg
e) DC Power Supply
Weight: 25kg
(26.5kg with mounting bracket 005-0048-00)
(27.5kg with mounting bracket 005-0047-00)
Note: total weight with RF PSU is 41kg
MODEL REV
SERIALNo.
MANUFACTURED
V Hz
A ac/dc
ROFN
I -SN
I AR UK Ld
t Kn
i gston upon Hu.l U.K.
f) Coolant Requirements
g) Environmental Specification
The inlet and outlet of the cooling water supply are clearly marked
and must not be confused.
b) Suspended Particles
c) Corrosion Inhibitor
The addition of VARICID T removes germs (algae and slime) from the
cooling water and the cooling water circulation. The concentration of
VARICID T to be used is: 0.02 % - 0.05 % (0.2 - 0.5 kg/m3).
Please note:
• Make sure that the two additives (VARIDOS and VARICID) are
mixed well with the cooling water and avoid over dosing!
• The cooling water must be changed after about 2 to 8 days.
• Do not operate the laser continually with VARICID T in the cooling
water.
If you wish to add anti-freeze to the cooling water, please note that the
addition of additives will affect the cooling characteristics of the water
and can reduce the effectiveness and efficiency of any chiller that is
used. (Pay particular attention to the instructions of the anti-freeze
manufacturer). In this case, please consult ROFIN. A combination of
anti-freeze and corrosion inhibitors may result in undesirable chemical
reactions. ROFIN recommends VARIDOS LASERCOOL GLS mixed
with pure ethylene glycol or the use of an inhibited anti-freeze based
on glycol. Please consult ROFIN for further information and advice on
frost protection.
The ROFIN SC x20 Laser Head is sealed with a rubber gasket material
between the main structure and the external and internal system covers. In
relatively clean environments, these seals will normally prevent dust, fume
and debris contamination of the optics and other parts inside the Laser
Head.
The purge gas can also be used to prevent condensation on the water
cooled optics and other parts inside the Laser Head.
Note that when using a chiller for cooling the system, the water
temperature should be set to avoid condensation on pipe work, etc. ie. set
above dew point. Where this is not possible, then the purge gas can be
used to prevent condensation inside the Laser Head.
The purge gas should be clean, dry and non-flammable eg. nitrogen, air,
etc.
Note that the ‘red’ blanking plug should not be removed from the
‘push-in’ fitting where purge gas is not used. Removal of the plug will
expose a contamination path into the Laser Head.
The inlet to any air compressor system should be kept away from any fume
or debris contamination sources such as the laser processing zone or the
exhaust port of any process gas/debris extraction unit.
Purity: ≥ 4.6
Particles: ≤ 0.05 µm
2.5 Fuses
There is only one user accessible fuse on the system which is on the DC
Power Supply Module. This fuse is used to protect the small control board
in the laser head and the power supply for the laser’s pre-ioniser.
2.6 Enquiries
Every effort has been made to ensure that the information in this manual is
correct, however components may be subject to design changes and
upgrading, from time to time.
Always identify the instrument, by both the model number and the serial
number, in all correspondence. This information is contained on the serial
number panel, which is located on the rear flange of the Laser Head
Housing.
ROFIN warrants that the product will be free from defects in material and
workmanship for twelve (12) months from delivery, if a warranty for the
individual product is not specified. All special warranty terms, eg. Laser
tubes, etc., are contained in the ROFIN SC System warranty terms that are
current, when the system is purchased. Copies of the ROFIN SC System
Warranty Terms can be obtained from ROFIN. ROFIN only warrants to the
original purchaser and only at the original location.
ROFIN cannot accept liability for any other costs associated with down time
due to misadjustment, failure or servicing of the system.
Service Department
Rofin-Sinar UK Ltd.
York Way
Willerby
Kingston upon Hull
HU10 6HD
U.K.
Note: Drop the 0 for international calls (UK country code is 44)
Check the outside of the packing box for obvious signs of damage or
change of the shock or tilt labels.
If any damage to the packaging or change to the tilt or shock labels has
occurred in transit, inform both Rofin and the relevant shipping company,
before taking any other action.
3.1 Unpacking
a) Cut the bands on the outside of the packing box. Open the box lid and
remove the cables, spares kit and documents in the top section. Remove
top section of the support packaging to reveal the Laser Head, the RF
Power Supply and the DC Power Supply.
b) Check all the components for signs of damage. If any damage has
occurred in transit, inform both Rofin and the relevant shipping company,
before taking any other action.
c) Carefully lift each component out of the packaging. Note that this may
require two people due to the weights involved.
3.2 Installation
It is strongly recommended that any personnel who are involved with the
installation, operation or maintenance of this laser equipment should first
read and fully understand the contents of this manual and in particular
Section 1 on Safety Instructions and Precautions.
The Laser Head should be secured using three of the five feet on the
base of the module, with the M8 bolts, large flat washers and spring
washers. Assume an available thread depth of 15mm. See Figure 3.2-1 for
the recommended holes to use for fixing the Laser Head.
When the frame has been bolted into the machine, the keyholes in
the base of the Power Supply can be located over the screws in the
frame, with the Power Supply approximately 12mm forward of the
front edge of the mounting frame. The Power Supply can then be
pushed back and the locking bar screwed into position (see drawing
no. 900-0040-00 for reference). There should be a clearance of
100mm at the front of the DC Power Supply for hose and cable
connections. The RF Power Supply should be mounted next to the
DC Power Supply.
Referring to the drawing, the ‘C’ through holes are designed to take
6mm (or ¼”) threaded screws to attach the mounting frame. Note
that the locating bar holes on the mounting frame should be visible
from the front of Power Supply.
When the frame has been bolted into the machine, the RF Power
supply can be slid into the lower compartment and bolted into
position using four M6 bolts. The DC power supply can be fitted into
position as described in a) above. The attached drawing (900-0037-
00) shows the fully assembled unit – note that there should be a
clearance of 150mm at the front of the Power Supply for hose,
cable and RF cable connections.
c) The third option for mounting the DC power supply is to use the ‘A’
hole pattern as shown on drawing 105-0086-00 or 105-0087-00.
The DC Power Supply can now be slid into position as with the
mounting frame described in a) above. A simple ‘L’ bracket can be
fitted at the front of the DC Power Supply to hold it in position.
The Laser Head, RF Power Supply and DC Power Supply all require
water cooling. The cooling specification is given in section 2.2f and
section 2.3. Use 8mm O.D. tubing – spare fittings are supplied in the
spares kit. The recommended route for the water cooling is given in
Figure 3.2.2-1.
The Laser Head, RF Power Supply and DC Power Supply have ‘Water
In’ and ‘Water Out’ labels to indicate which connections to use – the
water flow is monitored by a direction sensitive flow switch located
inside the Laser Head.
Note that where a closed cycle water cooler or chiller is used, corrosion
inhibitors must be added to the coolant – more details are given in
section 2.3.
Note that the ‘red’ blanking plug should not be removed from the
‘push-in’ fitting where purge air is not used. Removal of the plug
will expose a contamination path into the Laser Head.
The Laser Head, RF Power Supply and the DC Power Supply are
connected together by various cabling and connectors. The customer will
need to supply control signals to operate the laser. Details of the wiring and
the required signals are given in Figure 3.3-1.
15 way
Mains Power
D type cable
Input
LASER HEAD
R.F. Cable
USER CONTROL
Drawing no. SK-00114 gives details of the mains wiring for single and bi-
phase supplies. The DC Power Supply must be disconnected from the
mains supply before any attempt is made to remove the wiring access
cover or re-wire the unit for single or bi-phase operation. The drawing gives
details of the position of the wiring access cover.
The tables below give the connection details for the 9 way and 15 way
User Interface Cables (Remote Connectors).
15 Way D-Type
Pin 6 RF Power Supply Enable
Pins 4 & 5 Modulation Input – for laser output
for pulse width & duty cycle limits
see section 3.4 below
9 Way D-Type
Pin 1 Shutter Solenoid Drive
to open the shutter
9 Way D-Type
Pins 2 & 3 Shutter Closed and Open Sensors
to continuously monitor the status of the
Shutter
Pin 9 Emission Lamp OK signal
It is also recommended that the end user adds the facility for a
power on/off key switch, such that the system can be switched
off and the key removed when the laser in not in operation.
The circuit diagram for the ‘open collector’ outputs on the 9 way D-type
connector is shown in figure 3.3-2. Item 1 is the source impedance and the
‘active low’ state is achieved when the transistor (2) is turned on. Item 3 is the
output pin.
The maximum duty cycle for the power supply is limited to 50% with a
maximum pulsed on time of 1ms. If the modulation input for either of these
values is exceeded, then the RF output power will be limited to a safe
operating level. The state of the over modulation trip is output on pin 3 of
the 15 way D type connector. See section 3.4 below for more information.
The signals that drive the internal VSWR protection circuit are available on
pins 7 and 8. Diode peak detectors used to demodulate the RF envelope
pulses, together with the base emitter junction (of emitter follower buffers,
driving pins 7 & 8) cause a drop of approximately 1.6V, from the RF
envelope.
RF Enable – Pin 6
The differential signals used for driving RF Power Supply can be achieved
in a number of ways. The following is a suggested circuit for producing the
signals from a single square wave modulation input signal. Note that the
circuit also supplies the 5V dc RF Enable signal.
b) Mains out of limits Indicates that the mains supply is outside the
180Vac – 260Vac allowed range.
d) 48V out of limits Indicates that the output voltage is outside the
44v – 52V range. This may be due to an over-
current condition.
Mains out of limits, Fan failure, 48V out of limits, and Over Temperature
are latching trips, and will remain latched until the mains is removed for
>2 seconds.
The modulation input signals should be adjusted for the desired output
power as shown in the Output Power vs Duty Cycle graph included with the
warranty documentation for the system.
Frequency: up to 100kHz
The maximum duty cycle for the power supply is limited to a predetermined
value (eg. 50%) with a maximum pulse on time (eg. 400µs). If the
modulation input for either of these values is exceeded, then the RF output
power will be limited to a safe operating level.
a. any pulses > maximum allowed pulse width are truncated to 400µs
b. any pulses < the minimum pulse width are blocked ie. there will be
no laser output for pulse widths that are less than the allowed
minimum pulse width
c. any modulation frequency > maximum allowed frequency is blocked
ie. there will be no laser output for frequencies greater than the
maximum allowed frequency.
d. Any pulse that is > (1/f) x maximum duty cycle is truncated to (1/f) x
maximum duty cycle
Eg. working frequency = 25kHz, required pulse width = 25µs and
maximum duty cycle = 0.5 (ie. 50% duty). In this case the maximum
pulse width allowed would be 20µs.
The Safety Shutter incorporated into the Laser Head Module can be
operated to block off the laser beam so that it is not transmitted through the
final output window/lens of the system. The Shutter is intended to be used
as a safety device and has not been designed to operate as a process
control shutter.
When the Safety Shutter is operated a copper blade deflects the beam into
a water cooled beam dump inside the Laser Head Module. As the copper
blade does absorb some of the energy from the laser beam, it can get hot if
the laser is run continuously with the shutter in the closed position.
Laser light can be reflected back from a work piece or its supporting fixture
on material processing equipment. For example, if plastic sheet is cut on
an aluminium backing plate, a large fraction of the laser beam power could
be reflected from the supporting aluminium back into the beam delivery
and the laser head once the laser has cut through the plastic sheet. These
back reflections can damage beam delivery optics and, even worse,
destroy the cavity optics of the laser itself thereby rendering the laser
inoperative.
Systems that are used to cut metals or other reflective materials or which
have a metal supporting fixture for the work piece should be fitted with a
back reflection optical isolator that prevents reflected beams from entering
the laser head. Back reflection optical isolators are commercially available
from beam delivery component suppliers. Please contact the local Rofin
office or its Distributor for more details on optical isolators.
Please note that back reflection damage is not covered by the warranty for
the laser system and as such, it is the responsibility of the system
integrator to protect the laser from back reflection.
Maintenance
The system's sealed construction and limited moving parts ensures trouble
free and reliable operation.
One external item that will require periodic inspection and cleaning is the
final optical element which is located on the output flange of the Laser
Head Module. The frequency of inspection and cleaning will depend on
how the system is integrated into the customer’s machine and more
importantly, how well the final optic is protected from dust and
contamination.
Always ensure that the system is switched off and isolated from the mains
supply before attempting any cleaning procedures.
This section is designed to introduce correct and safe methods for the
cleaning of optical components.
Switch off the laser system and isolate from the mains supply.
Remove any beam delivery or beam shroud which is attached to the front
flange of the Laser Head and inspect the output optic. Clean if necessary,
observing the methods described in the following sections 4.3 and 4.4.
If there is visible dust, lint or other solid matter on the optics surface, gently
blow it off with a photographic blower brush.
Coated optics require careful handling, even the type labelled 'hard-
coated'.
If the surfaces are not badly contaminated, cleaning can be done fairly
easily, a fresh sheet of lens tissues folded to form a pad several layers
thick. Its size will be a compromise between fully covering the diameter or
width of the surface and being too large to clean evenly.
Enough optical grade solution to just dampen the pad should be applied
with a medicine type dropper.
Repeat as necessary, using a clean pad for each stroke. Using new pads
each time will minimise the possibility of scratching the optical coating.
When the optic is clean, replace the optic and lens shroud and reconnect
the compressed air.
Always ensure that the system is switched off and isolated from the mains
supply before attempting any cleaning procedures.
The external surfaces of the system can be cleaned with a mild detergent.
It is advisable to use a damp cloth to facilitate the cleaning of the external
cabinets, etc.
Take care not to allow entry of water into any of the electrical cabinets.
Safety Labels
The Laser Hazard symbol is intended to warn the operator of the possibility
of hazardous laser radiation.
(the other labels are positioned either inside the Laser Head or on the Power
Supplies)
Additional Information
V Hz
48V out of Limits
A ac/dc
Output
48V dc
ROFIN - SINAR UK
CONTROL
LASER
F. aux.
+
48 V DC
230 V AC
CONTROL
LASER
F. aux.
48 V DC
230 V AC
ROFIN - SINAR UK
1 2 3 4 5 6 7 8
RF PSU
003-0138-00
1
/VSWR STATUS
RF CABLE
9
0V LASER TUBE
2
VSWR STATUS
10
0V
3
OVER MODULATION
11
0V
D 4 D
/MODULATION
12 PREIONISER
0V
5
MODULATION
13 SHUTTER NORMALLY CLOSED
0V
6 IN THE DE-ENERGISED STATE
RF ENABLE
14
0V
7
RF FORWARD
15
0V
8
RF REFLECTED
500mA
+
22000uF
+
LASER HEAD MODULE 004-0047-00
22000uF
2 1
37
C DC POWER C
38
SUPPLY
559-0010-00
21
22
8
34
TRF5600H54
CON2 LASER EMISSION
1 1 SHUTTER ENABLE 1 1 1 1 1 0V LAMP
6 6 EMISSION INDICATOR 14 14 14 14 2 48V
2 2 SHUTTER OPEN SNS 2 2 2 2 3 LAMP DRIVE
7 7 0V 15 15 15 15 4 48V WATER FLOW SWITCH
3 3 SHUTTER CLOSED SNS 3 3 3 3 5 WATER FLOW SWITCH 1
8 8 0V 16 16 16 16 6 WATER FLOW SWITCH 2 LASER TEMPERATURE SWITCH
4 4 PSU HEALTHY COMMON (RELAY CONTACT) 4 4 4 4 7 LASER TEMPERATURE 1
9 9 LAMP HEALTHY 17 17 17 17 ENVIRONMENT 8 LASER TEMPERATURE 2
B 5 5 PSU HEALTHY N/O (RELAY CONTACT) 5 5 5 5 9 12V B
18 18 18 18 CONTROLLER 10 SHUTTER DRIVE
6 6 6 6 007-0002-00
19 19 19 19
7 7 7 7
20 20 20 20 CON1 SHUTTER DUMP TEMPERATURE SWITCH
8 8 8 8 1 SHUTTER DUMP TEMPERATURE 1
21 21 21 21 2 SHUTTER DUMP TEMPERATURE 2
9 9 9 9
22 22 22 22
10 10 10 10 CON3
23 23 23 23 48V 1
11 11 11 11 48V 2
24 24 24 24 SHUTTER OPEN SNS 3
12 12 12 12 SHUTTER CLOSED SNS 4
25 25 25 25 0V 5
13 13 13 13 0V 6
DC ASSEMBLY 005-0201-00 DC ENABLE 1 7
DC ENABLE 2 8
SHUTTER ENABLE 9
LAMP HEALTHY 10
11
EMISSION INDICATOR 12
A A
Drawn By N.PRIESTLEY York Way, Willerby SHEET
Date 10-Jun-2002 Kingston Upon Hull
Scale HU10 6HD England OF
1 1
Tel: 01482 650088
Fax: 01482 650022
CHECKED
TITLE
Mech Eng
SC x20 WIRING DIAGRAM (AIR COOLED)
Proj Eng PART No. REVISION
REV MODIFICATION DATE Elec Eng 150-0078-03 A3 3
\\Neilp\work\SC x20 wiring\Single phase\0078rev3.Sch 09:58:52
1 2 3 4 5 6 7 8
1 2 3 4 5 6 7 8
VCC VCC
48V
J1/10
R36
48V 2K2
J1/11
R30
D 50 10K Q4 D
BC337
Q11
BC327 R16 SHUTTER ENABLE
J1/1
0V 4K7
R15
DC ENABLE 2 0V 1K C4
J1/12 1nF
INTERLOCKS
0V 0V
6
Q13
BC337
R38C
L06-3S-10K C13
1nF
5
0V 0V 0V
R27 SHUTTER CLOSED
C J1/3 C
220R
6
Q8
BC337
R29C 1 13
L06-3S-10K C10
1nF
5
14 25
25 WAY D TYPE MALE/PLUG
0V 0V 0V
Front View
J1/4
J1/5
R5 EMISSION INDICATOR
J1/6
1K
Q3
BC337
J1/14
B J1/15 B
0V
J1/7
J1/16
J1/17 J1/8
0V
J1/18
J1/19
J1/20
R3 LAMP HEALTHY
J1/21 J1/9
220R
J1/22
Q1
BC337
J1/23
J1/24
J1/25
0V
A A
Drawn By N.PRIESTLEY York Way, Willerby SHEET
Date 25-Jul-2000 Kingston Upon Hull
Scale HU10 6HD England OF
1 1
Tel: 01482 650088
Fax: 01482 650022
CHECKED
TITLE
Mech Eng
SCX20 LASER INTERFACE DETAILS
Proj Eng PART No. REVISION
REV MODIFICATION DATE Elec Eng 150-0080-03 A3 1
D:\training\Scx Tarining 4-4-00\documents\folder\SC x20 wiring\0080rev1.sch
15:07:41
1 2 3 4 5 6 7 8
4 5 6 7 8
VCC VCC
R36
2K2
R30
PSU HEALHY 10K Q4 D
CONTROL/4
BC337
Q11
RELAY BC327 R16 SHUTTER ENABLE
CONTROL/1
CONTACTS 4K7
0V 0V
R39 SHUTTER OPEN
CONTROL/2
220R
6
Q13
BC337 1 5
R38C
L06-3S-10K C13
1nF
6 9
5
9 WAY D TYPE MALE/PLUG
0V 0V 0V
Front View
R27 SHUTTER CLOSED
CONTROL/3 C
220R
6
Q8
BC337
R29C
L06-3S-10K C10
1nF
5
0V 0V 0V
R5 EMISSION INDICATOR
CONTROL/6
1K
Q3
BC337
B
0V
R3 LAMP HEALTHY
CONTROL/9
220R
Q1
BC337
CONTROL/7
CONTROL/8
0V
0V
A
Drawn By N.PRIESTLEY York Way, Willerby SHEET
Date 25-Jul-2000 Kingston Upon Hull
Scale HU10 6HD England OF
1 1
Tel: 01482 650088
Fax: 01482 650022
CHECKED
TITLE
Mech Eng
SCX20 DC INTERFACE - CONTROL CONNECTOR
Proj Eng PART No. REVISION
REV MODIFICATION DATE Elec Eng 150-0082-03 A3 1
D:\training\Scx Tarining 4-4-00\documents\folder\SC x20 wiring\0082rev1.sch
15:03:40
1 2 3 4 5 6 7 8
ROFIN SC System
The RF Power Supply used to drive the Laser Head is fitted with a
specialised interface. This is a 15 pin male “D” type connector and carries
all the signals required to drive the laser and monitor the status of the RF
Power Supply. In order to provide maximum immunity from ambient noise
some of these signals are in what is known as a differential two wire
format. The purpose of the converter is to allow the user to be able to
control the drive to the laser by means of simple TTL level 5V signals.
Part No. 091-0103-00 has a 15 pin Female “D” type connector which
attaches to the RF Power Supply. At the other end of the cable the 15 pin
Male end mates with the female connector on the converter.
Part No.091-0104-00 has a 15 pin Female “D” type connector fitted to one
end but is not terminated at the other. This is a screened 12-core cable and
is intended to be connected to the user’s pulse generation and monitoring
circuitry.
TTL – 422
RF POWER
CONVERTER
SUPPLY
091-0103-00 091-0104-00
In order to drive the Laser, the following signals MUST be supplied by the
user as a minimum requirement :-
____________________________________________________________________________________________________________
906-0012-00 Rev 1 1999 Rofin-Sinar UK Ltd Rofin SC System
Signal ground
There are four connections provided. As they are all internally connected
within the converter, the user is free to select whichever they wish when
driving the Laser.
Chassis ground
This connects to the chassis of the converter and to the chassis of the RF
Power Supply.
IMPORTANT
It must be understood that if the system is powered up and the minimum signals
as detailed previously are supplied, Laser Radiation will be produced. All
safety procedures as detailed in the relevant Operator's Manual must be
implemented and followed.
This is a Class 4 (Class IV) laser product. All precautions relevant to this
class of laser product should be strictly observed. Use of controls or
adjustments or performance of procedures other than those specified
herein may result in hazardous radiation exposure. Strict compliance with
the safety precautions set out and referred to in this manual and extreme
care in use are essential to minimise the chance of accidental damage to
the equipment or personal injury. Rofin-Sinar does not accept liability for
any damage or injury howsoever caused or arising
____________________________________________________________________________________________________________
906-0012-00 Rev 1 1999 Rofin-Sinar UK Ltd Rofin SC System
3. Additional Signals
Inside the converter unit is a two-position jumper. The Factory setting is in the
ON position. If switched to the OFF position, an RF ENABLE signal must also
be provided by the user. This Signal (PIN 6 on 15 Way D-Type) is also TTL
level and is Active high. Without this signal there can be no Laser emission. The
user may wish to take advantage of this as a further safety feature.
____________________________________________________________________________________________________________
906-0012-00 Rev 1 1999 Rofin-Sinar UK Ltd Rofin SC System
1 2 3 4 5 6 7 8
D D
R6
C5 10K J2
J1 10nF
16
CON2 RF_REFLECTED
15
1
2
14
RF_FORWARD
13
0V
C R3 12 C
RF_ENABLE_SIGNAL
11
1K VCC
10
9
CON1 8
PULSE_INPUT
R7 R2 R5 7
8 RF_REFLECTED
C4 10K C1 D1 6
15 1K 2K2 OVER_MODULATION
R8 10nF C2 22uF 35V SA5.0 5
7 RF_FORWARD
10nF 4
14 1K U1 VSWR_STATUS
3
6 RF_ENABLE 1
VCC 2
13 8 VSWR_STATUS_N
RI+ 1
5 MODULATION_IN 7 2 0V
RI- RO CON16
12 0V 0V
4 MODULATION_IN_N 6
DO+ R1
11 3
R9 DI
3 OVER_MODULATION 5 4 1K
DO- GND
10 1K 0V
2 R10 VSWR_STATUS DS8921 R4
9 1K C3 10K
1 R11 VSWR_STATUS_N 1500pF TP1
1K TESTPOINT
DB15F
0V 0V 0V 0V
1
0V
B B
MOUNTING HOLES
MNT1 MNT2 MNT3 MNT4 MNT5 MNT6 MNT7 MNT8
CON1 CON1 CON1 CON1 CON1 CON1 CON1 CON1
1
1
1
1
1
1
1
1
A A
Drawn By York Way, Willerby SHEET
Date Kingston Upon Hull
Scale HU10 6HD England OF
1 1
Tel: 01482 650088
0V Fax: 01482 650022
CHECKED
TITLE
TTL TO RS422 CONVERTER
Mech Eng
Proj Eng PART No. REVISION
REV MODIFICATION DATE Elec Eng 150-0011-01 A3 3
\\Necatia\sharing neca\0011rev3.sch 28-Jun-1999 11:56:32
1 2 3 4 5 6 7 8