Raytools BT240 Series - Assist Gas Specifications; Fiber Connector Types; Fiber Orientation Adjustment

BT240 Product Manual
V1.0 RayTools AG. Copy Right 6 | 15
www.raytools.net
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 and the 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 H
2
O
（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