Raytools BT240 Series User manual

BT240 Series
Product Manual
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Version：
V1.0
Date：
2016/2/4
Historical Versions：
History
Edition
Date
Description of
change
Editor
Reviewer
Date of
Review
V1.0
2016/01/27
Version Change
Mandy
Alex
2016/2/4

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Thank you for your choosing our product!
This manual introduces the use of BT230 in detail, going through the specification of installation, setup,
operation and service. If you have any other questions, you may contact us for further consultation.
Before using this series of cutting heads and other related devices, please read this manual carefully,
which will help you use them better.
Because the product keeps renewing, please note the product you receive may differ slightly from the
illustrations in this manual in some aspects. We apologize for your inconvenience here.
Index
1Introduction..........................................................................................................................................................3
1.1 Product Features.......................................................................................................................................3
1.2 The functions of the modules................................................................................................................3
2Installation-Mechanicals....................................................................................................................................5
2.1 Installation Of The Hole Site ..................................................................................................................5
2.2 Plumbing....................................................................................................................................................5
2.2.1 Water cooling...............................................................................................................................5
2.2.2 Assist Gas......................................................................................................................................6
2.3 Fiber Connectors ......................................................................................................................................6
2.4 Fiber Orientation Adjustment................................................................................................................6
3Operation-Mechanicals......................................................................................................................................8
3.1 Beam Centering ........................................................................................................................................8
3.1.1 QCS Beam Centering..................................................................................................................8
3.1.2 QBH Beam Centering .................................................................................................................8
3.2 Setting Focus Position.............................................................................................................................8
4Service .................................................................................................................................................................10
4.1 Cleaning Opitics......................................................................................................................................10
4.2 Changing Lens ........................................................................................................................................10
4.2.1 Changing 2D Laser Head Cover Slide...................................................................................10
4.2.2 Changing 3D Laser Head Cover Slide...................................................................................11
4.2.3 Changing Collimating Lens Assembly ..................................................................................11
4.2.4 Changing Focusing Lens..........................................................................................................12
4.3 Removing Tip Assembly........................................................................................................................13
4.3.1 Replacing the ceramic head....................................................................................................13
4.3.2 Replacing 3D Module Tm ........................................................................................................13
4.3.3 Replacing Gas Jet Tip ...............................................................................................................14

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1Introduction
The manual goes through the brief introduction of installation, setup, factory settings, operation and
maintenance service of the BT230 series. While BT230 is available in many optical mechanics and
customized configurations, this manual is genetic to the core products.
BT230 is a cutting head applied to low-power industrial laser production of RAYTOOLSAG company.
The wholly optimized optical focus quality, the design of gas channel inner chamber, breathing gas flow
and cooling nozzle, the built-in water-cooling unit as well as the delicate focus sets can completely meet
different thin, mediate and thick steel-cutting applications and other customized industrial laser processing
environment. A variety of flexible optical fiber connectors and optical collimating and re-focusing
equipments adapt it to most optical fiber laser devices in mainstream industry.
1.1 Product Features
Compact modular design



-efficiency water-cooling system
-in annular and lateral gas flow, easy to cut high-reflective materials and preventing thick plate
from blasting and sputtering



1.2 The functions of the modules
See Figure 1, a laser head contains 1) a collimation module CM, 2)a centering module ATP, 3)a focusing
module FM, 4) a protection window module WM and 5) a nozzle module TM.
1）Module CM: collimate the optical fiber, collimate the input laser beam to paralleled laser beam and
ATP
TM
WM
CM
FM
TM & WM
CM
TM
FM
WM
QCS
QBH
QBH
Figure 1 the structure of laser heads
FM

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center the beam.
2）Module ATP：aiming at laserheads with paralleled beam(not need tobe collimated),adjust the angles
of the beam (beam centering).
3）Module FM: focus the collimated light beam to high-power-density focused light beam, and move ups
and downs to set the focal point.
4）Module WM: protect the optics, protect the focusing lens from being damaged by residues and
lengthen the life span of the optics.
5）Module TM: guide the focused light beam to the processing workpiece and spray high-speed gas flow
to achieve high-quality cutting.

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2Installation-Mechanicals
2.1 Installation Of The Hole Site
BT240 laser heads are fixed on the machine tool by a
mount plate attached to FM module. See Figure 2 for hole
sizes and locations. Clients are recommend to install the
laser heads vertically to the processing plate according to
the drawings andmake sure thelaser heads are fixed tightly,
without waggling in process. It is one of the preconditions of
steady subsequent cuttings.
Attention：Z-axis motor plate using to fix the
laser head plate should be conducted to the machine tool and the ground.
2.2 Plumbing
2.2.1 Water cooling
BT240 processing heads are equipped with
a water-cooling circuit, the direction of water
moving in and out can be changed at will. It is
recommended that power levels greater than 500
watts use water cooling. See Figure 3 for hose
locations and numbers and the table on the right
for recommended flow rates.
The cooling circuit is designed to be
operated on either a closed-looped cooling
system or facility tap water--as long as the requirements in the table above are met.
Minimum Flow Rate
1.8 liters/minute（0.48gpm）
Inlet Pressure
170-520kPa(30-60 psi)
Inlet Temperature
≥room temperature /＞dew
point
Hardness （Equivalent to
CaCO3）
＜250mg/liter
PH
6 to 8
Particulate Size
<200 microns in diameter
Figure 3-2 Hose Location Of The 2D
laser heads
Figure 3-1 Hose Location Of The 2D
laser head
Figure 2 Hole Locaitions

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2.2.2 Assist Gas
Impurities in the assist gas such as hydrocarbons (THC) and moisture (H2O) can damage optics, cause
power fluctuations and result in inconsistent cuts. See the table below for recommended assist gas
specifications. The purer the gas is , the higher quality the cutting will gain.
Impurities can also be picked up in the
supply lines. Non-metallic materials can
allow oxygen and moisture to permeate the
system and can be a source of dust and
hydrocarbons. Stainless steel lines and
fittings are recommended. Filters and
purifiers that remove particles down to 0.01
microns should be used to purify the optical system.
Regulators with a stainless steel diaphragm are recommended. Industrial regulators can aspire air and the
neoprene diaphragm can be a source of hydrocarbons.
Attention：The air tube should not be changed at will. Especially, raw materials should be
avoided to seal the tube. Otherwise, the gas circuit will be jammed, the machine may not
work normally and the optic items will be damaged.
2.3 Fiber Connectors
BT240 will adapt to most industrial fibers. It is equipped with collimators.
The interface between the laser andthe cutting head is called the fiber conductor. Common fiber connectors
include QBH, QD, LLK-D and LLK-B. Aiming at conductor QD, BT has 14, 24, 25, 30 grip rings. Other
connections are available too. Each fiber connectors has its own unique method of securely attaching the fiber.
Refer to the fiber type for specific instructions. QBH connector is illustrated in Figure 1.
Caution：Great care must be taken to ensure the optics remain clean. Wipe any excess debris
from the head before servicing. If the head is oriented with vertical beam input, the head
should be rotated to prevent debris from falling onto the optics. Fix the head after the fiber
is inserted.
2.4 Fiber Orientation Adjustment
We introduce the fiber input method according to QBH connector
here.
1）The red dot on QBH connector should be in alignment with that on
the hand wheel. Connect the fiber with the QBH connector. Make sure
the red dot on the connector is in alignment with these two spots.
2）Rotate the hand wheel clockwise. When you hear ‘da’, pull the wheel
and rotate towards the right again to the correct orientation.
When the fiber is connected to the head, the red dot on the fiber may
be far away from the red dot on the head, which prevent the fiber being
input straight. To reoriented the connector, you may do as follows. See
GAS
PURITY
MAX H2O
（ppm）
MAX THC
（ppm）
Oxygen
99.95%
<5 ppm
<1 ppm
Nitrogen
99.99%
<5 ppm
<1 ppm
Argon
99.998%
<5 ppm
<1 ppm
Helium
99.998%
<5 ppm
<1 ppm
Figure 4-1 Fiber Orientation

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Figure 4-1. Loosen the 4 clamping bolts in Figure 4-1 with a
wrench. Rotate the QBH connector. Once the fiber connector is
oriented correctly tighten the clamping bolts and the set screw.
BT240 QCS connector input manual
(1)loosen locking ring 1 and 2.
(2)Input the fiber connector horizontally
(3)Tighten locking ring 1 and 2. Use a wrench if necessary.
Figure 4-2 Fiber Orientation

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3Operation-Mechanicals
3.1 Beam Centering
3.1.1 QCS Beam Centering
There are four set screws in the four corners. Divide them into two
groups and each group has two screws. Set the screws in pair: tighten
one and loosen the other.
Centering method：
1. Loosen the adjuster screw in the opposite direction you want
the beam to move. Then tighten the adjuster screw that is
opposite of the screw that is opposite of the screw that was just
loosened.
2. Use two groups of screws until the beam is centered in the tip.
3. Once the beam is centered, double-check to ensure that the all adjuster screws are snug finger tight.
3.1.2 QBH Beam Centering
The best cutting quality to a great extent relies on the centering lens. If the lens is not in the middle, the
beam may touch the tip or the inner wall and lead to deformation because of high temperature.
When the gas jet tip is changed or the cutting quality is not good, the lenses should be centered.
Tip centering of BT240 is accomplished by adjusting the X-Y position of the collimating lenses.See Figure 5
for locations of adjuster screws on cutting heads. Loosen or tighten the screws with a 2.5mm hex wrench until
the beam is centered in the tip.
One common method to make sure the beam is centered in the tip is to use a piece of translucent tape
(1)Put a piece of translucent tape on the end of the Gas Jet Tip.
(2)Turn on the laser’s internal red aiming beam and observe the
position of the beam on the tape relative to the nozzle orifice. Use
the adjuster screws to center the red dot on the nozzle orifice.
(3)Next power up the laser at a power setting of 80W-100W and
take a shot.
(4)Tear down the tape and check whether the hole is centered
in the nozzle orifice.
(5)A series of adjustments and shots may be needed until the
beam is centered in the Gas Jet Tip.
This method needs a series of adjustments and is the basic
operation of any laser centering.
3.2 Setting Focus Position
BT240 is equipped with a adjustable lens holder that allows you to move the laser focal point to optimize
the laser processing. The lens has a total of 20mm of movement. You should find the focal point before cutting.
There are a lot of ways to find the focal point. One of them is to paste crepe paper at the end of the tip:
1. Adjust the Focus Dial Knob to the largest scale and power up the laser at a power setting of 80-100W
2. Take a laser shot on the crepe paper each movement of less than 0.55mm (the nearer the movement
is, the better)
Figure 5-2 Centering
Figure 5-1 Centering

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3. Take shots several times. Find the smallest shot and its relevant scale is the best focus. (Thefocal point
is just on the nozzle orifice.)
The relationship between the Focal Dial Knob and the focal point:
The adjusting range of the focal point is ‘8~12’.
For example: when the Focal Dial Knob is at 0, the position of the focal point will be at the end of the tip.
When the Focal Dial Knob is at +8, the position of
the focal point will be 8mm in the tip.
To adjust the focus position, follow this procedure:
Loosen the lock nut by rotating it
counterclockwise
Turn the Focus Dial Knob and adjust the focal
distance according to the scale
Once the focus position is properly set,
tighten the Lock Nut by rotating it clockwise
Figure 6 Setting Focus Position