Under normal conditions, when the machine is powered on, the laser head should return to the upper left corner as its initial/starting position. However, if you have noticed that the laser head moves/ drifts to the right upon startup, this is most likely due to dust accumulation around the optocoupler inside the laser head.
Please follow the steps below to do the cleaning.
Step 1: Power off the machine.
Step 2: Use a screwdriver to remove the 4 screws on the top of the laser head.
Step 3: Remove the fan's cover, the fan and disconnect the air tube.
Step 4: Spray alcohol on a cotton swab and thoroughly clean the dust around the OptoCoupler.
Step 5: Reconnect the air tube and install the fan.
- pay attention to the position of the fan, ensure the side with the red wire is put on the lower left corner of the laser head.
Step 6: Put the fan cover back on the laser head and secure it with the 4 screws that are removed in step 2.
For more video tutorials, please click on this link (watch from the beginning to 2min 15secs or so): how to clean and grease your machine? Maintenance Instructions