1. After cleaning the linear guides, apply liquid‑type bearing lubricating oil to the linear guides, then run the axes back and forth for lubrication. There is no need to remove the bearings.
2. You may purchase replacement spare parts from us when the bearings are damaged.
3. Blow off cutting dust from the machine with compressed air after every use. Depending on operating frequency, apply lubricating oil (ordinary clear, low‑viscosity liquid lubricant) to the linear guides and screw rod every two weeks or every month.
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About Grounding:

Prepare a thick copper wire , one end attached to the foot of the machine working table or any screw of the working table, and the other end connected to the Metal water pipes at home, or nailed a large nail into the ground then connect it to the copper Wire.............

About cooling water:

1. The volume of the cooling water tank should be greater than 20L.
2. You can use a plastic container(barrels) with a lid. Prevent dust falling into the water.
3. The cooling water temperature should be controlled below 35 degrees Celsius. Use a large capacity water tank can effectively reduce the water temperature.
4. You can use purified water or tap water as cooling water.
5. You can add 1% ~ 3% liquid rust to the cooling water (liquid rust for automobile water tank can be used).
6. The water pump must be completely submerged in the water.
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see below picture, plug the two wires arbitrarily to A&B pins of switch .

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If the XYZ can’t  move:

Step 1. Check whether the red Emergency Stop button on the control box is pressed.

Step 2. Check whether the USB cable is connected to the computer normally, and If your computer is a laptop, you must use its power adapter to power the computer.  Plug the USB cable into other USB port of the computer and then try.

Step 3. Turn on the power switch and check whether the stepper motor is self-locking.  If the stepper motor can be turned by hand, it means that the motor is not self-locking.

Step 4. If the stepper motor is NOT self-locking, turn off the power switch and check the fuse (see attached picture)

Step 5. If there is no problem with the fuse, open the control box, turn on the power switch, and check whether the green light of the power module is on (see attached picture). If the light is not on, the power supply module burnt out.

In addition, if you are a Japanese user, please first test whether your input voltage is stable or greater than 100V. It is recommended that you............