If the optical path is misaligned, the optical path should be realigned.
Signs of the misaligned optical path：
1. engraved patterns will be deeper to lighter in a certain direction
2. the cut section is not vertical after cutting.
Preparation Items：
Included in the accessory box：
1｜2.5mm hexagonal wrench
2｜Torx screwdriver
3｜Double head wrench
4｜Double-sided tape
Alignment Instructions：
1. The Y-axis direction is related to the first reflective mirror. Therefore, after the first reflective mirror is correctly adjusted, the laser spot at the bottom left position should coincide with that obtained at the top left position. When adjusting the first reflective mirror, put the double-sided tape on the second reflective mirror.
2. The X-axis direction is related to the second reflective mirror. Therefore, after the second reflective mirror is adjusted, the laser spot at the middle-right position should coincide with that at the middle-left position. When adjusting the second reflective mirror, put the double-sided tape on the third reflective mirror.
3. The Z-axis direction is related to the third reflective mirror. Therefore, after the third reflective mirror is adjusted, the laser spot should be in the center of the laser outlet. When adjusting the third reflective mirror, put the double-sided tape on the laser outlet.
Alignment Steps：
Laser tube
Target： To confirm the laser spot is on the first reflective mirror.
Method :
1. Lift the back cover： Please use the Torx screwdriver to remove the 2 screws on both sides of the back cover and then lift the cover.
2. Paste the tape： Take a piece of double-sided tape and paste it on the round metal frame of the first reflective mirror.
3. Obtain a laser spot on the first reflective mirror： Close the door cover > Click the “MAINTENANCE” on the screen > Click “Laser Pulse” > Open the door cover > Make sure the laser spot is within the mirror, avoiding the frame of the mirror.
Target： To make the bottom left spot coincide with the top left spot.
Method：
1. Release the motors and paste the tape： Click the "MAINTENANCE" of the machine to finish the X-axis and Y-axis homing > Click "Motors"> Take a piece of double-sided tape and paste it on the metal frame of the second reflective mirror.
2. Obtain the top left laser spot： Move the laser head to the top left manually > Close the
door cover > Click “Laser Pulse” > Open the door cover > Confirm the laser spot position.
Observing how the next (bottom left) laser spot moves are necessary.
3. Obtain the bottom left laser spot： Move the laser head to the bottom left manually > Close the door cover > Click "Laser Pulse"> Open the door cover > Confirm whether the bottom and top left are overlapped at the same position and avoid the reflective mirror frame as shown in the picture above. If the laser spots are not overlapped, adjust the mirror adjustment screw behind the first reflective mirror according to the direction of laser spot movement so that the bottom left laser spot position moves to the top left.
4. Adjust the first reflective mirror： Drop a small amount of alcohol on the nut to soften the thread locker > Use a double head wrench to loosen the nut without turning the mirror adjustment screw > Tighten or loosen the mirror adjustment screw according to the direction of laser spot movement (control direction explained later) > Repeat steps 2, 3, 4 until the bottom left laser spot overlap with the top left laser spot (if you can no longer determine the direction of laser spot movement, you need to reapply the double-sided tape) > After finishing the adjustment, tighten the nut without turning the mirror adjustment screw.
After confirming that the bottom and top left spots coincide and avoiding the reflective mirror frame, adjust the second reflective mirror.
Tightening or loosening the screw is equivalent to adjusting the angle of the reflective mirror.
－ When turning the yellow screw, the red and green screw link can be considered as the axis of rotation.
By tightening the yellow screw (clockwise), you can think of pushing the mirror from the upper left with red and green as the axis, and the laser spot will move down to the lower right. Loosening the yellow screw (counterclockwise), you can think of the red and green as the axis to move the mirror backward in the upper left, and the laser spot will move up to the upper left.
－ When you turn the green screw, you can think of the yellow and red screw link as the axis of rotation.
By tightening the green screw (clockwise), you can think of the yellow and red as the axis to push the mirror from the upper right, and the laser spot will move to the left. Loosening the green screw (counterclockwise), you can think of the yellow and red as the axis to move the mirror backward in the upper right, and the laser spot will move to the right.
－ When turning the red screw, think of the yellow and green screw link as the axis of rotation.
By tightening the red screw clockwise, you can think of the yellow and green as the axis to push the mirror from the lower left, and the laser spot will move up. Conversely, suppose you loosen the red screw (counterclockwise). In that case, you can think of the yellow and green as the axis to move the mirror backward in the lower left, and the laser spot will move downward.
Second reflective mirror
Target： Make the middle right spot coincide with the middle left spot.
Method:
1. Paste the tape： Take a piece of double-sided tape and paste it on the round metal frame of the third reflective mirror.
2. Obtain the middle left laser spot： Move the laser head to the middle left manually > Close the door cover > Click “Laser Pulse” > Open the door cover > Confirm the laser spot position. Observe how the next (center) laser spot moves are necessary.
3. Obtain the center laser spot： Move the laser head to the center manually > Close the door cover > Click “Laser Pulse” > Open the door cover > Confirm whether the center and middle left overlap in the same position. Next, you need to observe how the next (middle right) laser spot moves.
4. Obtain the middle right laser spot： Move the laser head to the middle right manually > Close the door cover > Click “Laser Pulse” > Open the door cover > Confirm whether the spots overlap in the same position. If they are not completely overlapped, adjust the mirror adjustment screw behind the second reflective mirror according to the direction of laser spot movement so that the middle right laser spot position moves to the middle left laser spot position.
5. Adjust the second reflective mirror： Drop a small amount of alcohol on the nut to soften the thread locker > Use a double head wrench to loosen the nut without turning the mirror adjustment screw > Tighten or loosen the mirror adjustment screw according to the direction of laser spot movement (control direction is explained later) > Repeat steps 2, 4 and 5 until the middle right laser spot overlap with the middle left laser spot (if you can no longer judge the direction of laser spot movement, you need to reapply the double-sided tape) > After finishing the adjustment, tighten the nut without turning the mirror adjustment screw.
6. Confirm the spots of the middle right and the middle left overlap： Take a piece of double-sided tape and put it on the frame of the third reflective mirror > Repeat steps 2 and 4 to confirm the overlap of the middle right and middle left spots and avoid the reflective mirror frame, then fine-tune the laser head assembly position so that the over- lapping spot is located on the perpendicular line of the round metal frame (black solid line area in the figure).
7. Fine-tune the laser head assembly position： Use a 2.5mm hexagonal wrench to loosen the four hexagonal screws on the X-axis linear rail that hold the laser head assembly in place > Move the laser head forward or backward depending on the position of the spot > Roughly tighten the four screws > Move the laser head to the center manually > Close the door cover > Click “Laser Pulse” > Open the door cover > Confirm that the spot is on the perpendicular line > Move the laser head to the chassis front > Click “Camera” and make sure the upper and lower edges of the camera are parallel to the machine chassis > Fix the four hexagonal screws of the laser head assembly. After confirming that the middle right and middle left spots are on the perpendicular line of the round metal frame, you can adjust the third reflective mirror.
Third reflective mirror
Target： To make the laser spot hit the center of the laser outlet.
Method：
1. Paste the tape： Take a piece of double-sided tape and put it on the laser head outlet > Gently press the double-sided tape to make a circle of laser head outlet indentation on the tape's adhesive surface.
2. Obtain the center laser spot： Move the laser head to the center manually > Close the door cover > Click "Laser Pulse"> Open the door cover > Make sure the laser spot is in the center of the laser outlet. Suppose it is not in the center of the circle. In that case, you need to adjust the mirror adjustment screw behind the third reflective mirror according to the position of the spot.
3. Adjust the third reflective mirror： Use a double head wrench to loosen the nut without turning the mirror adjustment screw > Tighten or loosen the mirror adjustment screw ac- cording to the direction of the laser spot movement (the control direction is explained later) > Repeat steps 3 and 4 until the laser spot falls in the center of the beam outlet (if you can no longer judge the laser spot movement direction, you need to reapply the double-sided tape) > After finishing the adjustment, tighten the nut without turning the mirror adjustment screw.
The adjustment method is different from the first and second reflective mirrors because the position of the mount under the third reflective mirror is fixed, so when the screw is tightened, the mount will not move, but the reflective mirror will be ejected.
- When turning the yellow screw, the red and green screw link can be regarded as the axis of rotation.
Tightening the yellow screw (clockwise), you can think of moving the mirror backward in the upper right with red and green as the axis, and the laser spot will move to the upper right. Loosening the yellow screw (counterclockwise), you can think of the red and green as the axis to push the mirror from the upper right, and the laser spot will move to the lower left.
- When turning the green screw, the yellow and red screw link can be regarded as the axis of rotation.
Tightening the green screw (clockwise), you can think of moving the mirror backward in the upper left with the yellow and red as the axis, and the laser spot will move to the left. Loosening the green screw (counterclockwise), you can think of the yellow and red as the axis to push the reflective mirror from the upper left, and the laser spot will move to the right.
- When turning the red screw, the yellow and green screw link can be regarded as the rotating axis.
Tightening the red screw (clockwise), you can think of moving the mirror backward in the lower right with the yellow and green as the axis, and the laser spot will move downward. Loosening the red screw (counterclockwise), you can think of the yellow and green as the axis to push the reflective mirror from the lower left, and the laser spot will move upward. After completing the above adjustments, you can ensure that the laser beam output is uniform at any location in the working area to achieve normal working requirements. Please perform "Calibrate Camera" again before use. 【Beam Studio Tutorial】 Camera Calibration.
If the laser beam output verticality is strictly required, you can further adjust the verticality of the optical path.
Advanced adjustment： Verticality of the optical path (selective adjustment)
Target： To adjust the laser spots obtained from the laser head socket and from the laser head outlet to the center of the circles.
Method：
1. Paste the tape： Take a piece of double-sided tape and paste it flat on the frame of the third reflective mirror.
2. Get the center laser spot： Move the laser head to the center manually > Close the door cover > Click “Laser Pulse” > Open the door cover.
3. Measure the center offset value： Measure the distance between the center of the spot and the center of the frame, x (mm). The laser spot should be located at the top of the perpendicular line of the metal frame (as shown in the picture above). If the position is incorrect, please contact your reseller.
4. Move the third reflective mirror： Loosen the nut, and use a double head wrench to loosen the nut holding the mirror adjustment screw > Adjust the three mirror adjustment screws so that the third reflective mirror and the triangular mirror holder are parallel and have x (mm) spacing (as shown below).
5. Take the honeycomb table out： Move the laser head to the upper right of the working range > Press on the "Autofocus" button for 2 seconds to do the Z-axis homing > Lift the honeycomb table handles, hold the two sides of the honeycomb table, and pull it out. Please avoid hitting the probe while taking the honeycomb table out.
6. Adjust the third reflective mirror： Refer to the "third reflective mirror" method and adjust the laser spot to the center of the laser outlet again.
7. Move the laser head cover aside： Loosen two screws on the laser head cover and then move the cover aside.
8. Paste the tape： Unscrew the nozzle fastening ring and remove the laser head (keep the focus lens aside carefully) > Take a piece of double-sided tape and paste it flat on the laser head socket, gently press the double-sided tape so that there is a socket indentation on the adhesive side of the double-sided tape.
9. Obtain the center laser spot： Move the laser head to the center manually > Close the door cover > Click "Laser Pulse"> Open the door cover > Observe the spot position and move the third reflective mirror as appropriate.
10. Move the third reflective mirror (as shown below)：
a. The laser spot is in the center of the laser head socket, which means the optical path is vertical and does not need to be adjusted.
b. If the spot is to the right, reduce the parallel gap of the reflective mirror and loosen the three mirror adjustment screws by half a turn, then repeat steps 6, 8-10 until the spot is in the center of the laser head socket.
c. If the spot is to the left, increase the parallel gap of the reflective mirror and tighten the three mirror adjustment screws by half a turn, then repeat steps 6, 8-10 until the spot is at the center of the laser head socket.
Note that the focus lens, laser head, and nozzle fastening ring are installed when obtaining the laser spot of the laser head outlet.
11. Check the center laser spot： After the adjustment, ensure the laser spots got from the laser head socket and from the laser head outlet to the center of the circles.
12. Install the laser head and its cover back： Put the laser head and its cover back > Tighten the two screws of the laser head cover.
13. "Calibrate Camera"： Before using the camera preview function, please first "Calibrate Camera" .【Beam Studio Tutorial】Camera Calibration.
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