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Step 4: Place a masking tape on the opening before Mirror 4. Move the pen carriage to the
upper left corner of the working area. Fire the laser and adjust Mirror 3 so the laser beam
passes through the center of the opening. Move the pen carriage to the upper right end of the
working table. Fire the laser and adjust Mirror 3 so the laser beam passes through the center of
the opening. The laser should pass through the same spot when the pen carriage is positioned at
upper left and upper right. Do the same for the bottom left corner and bottom right corner.
Place a masking tape over the nozzle opening. Position the pen carriage at one of the 4 corners
of the working area. Fire the laser and adjust Mirror 1 so the laser passes through the center of
the nozzle opening. Repeat for all 4 corners of the working area. After adjusting Mirror 1, you
may have to re-adjust Mirror 2 and Mirror 3 as well. (Repeating Steps 2 & 3.)
If the laser beam passes through the center of the nozzle opening at all 4 corners, then the laser
beam should have been aligned properly. Cut four 20x20 mm squares at the four corners of the
working area to double check that the edges of the square are not slanted
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