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BT210 SERIES 800W Laser Cutting Heads User Manual
2.2.2 Assist Gas
Impurities in the assist gas such as hydrocarbons (THC) and moisture (H
2
O) can damage optics, cause power
fluctuations and result in inconsistent cuts. See the table below for recommended assist gas specifications.
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.
Notice： 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 Input
The fiber input is the interface between the laser and the cutting head. BT210 will adapt to most industrial fibers. It
is equipped with collimators.
Common fiber connectors include QBH, QD. Other connections are available too, such as 14, 24, 25, 30 mm grip
rings (See figure 5). 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
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:
(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.
(3) 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
Figure 4. Loosen the 4 clamping bolts in Figure 4 with a wrench. Rotate the QBH connector. Once the fiber
connector is oriented correctly tighten the clamping bolts and the set screw.
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
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