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Laser Cutter/Full Spectrum Laser 40W/Unofficial Manual
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= Tightening Your Laser = ==Laser Head== The laserhead has 4 plastic wheels. These attach to an eccentric pin through a small Phillips (crosshead) screw. If you rotate these eccentric pins then it will tighten or loosen against the aluminum X axis rail. These eccentric pins are held in position by a set screw with a hex head 90degrees from the top Philips screw. Remove the setscrew before attempting to adjust the eccentric pins. The eccentric pins need to be adjusted by inserting an extremely short FLAT head screwdriver through the BOTTOM. If you adjust the crosshead screw from on top it will have extremely limited motion for adjustment. Tighten the top crosshead screw then do all further adjustments from the bottom. To remove the pins, turn from the bottom to loosen then push from the bottom to remove. # Loosen the 4 eccentric pins by using the short screwdriver from the bottom. The laserhead will not be clamped to the X axis gantry anymore. # Adjust the top 2 eccentric screws so they that the laserhead is straight with the X axis. Since they are eccentric you want the laserhead platform straight otherwise the belt will be pulled at a angle. # Adjust the bottom 2 eccentric screws so that the laserhead is as loose as possible but all 4 wheels are just barely still rolling. # Insert the 4x set screws with the hex heads back and tighten. Note that by putting the set screws back in it will tighten the eccentric pins slightly so that is why we say adjust as loose as possible but still rolling in step 3. # Test it out and ensure the X axis is not binding during rastering. If you would like you can insert some WEAK thread locking glue on the screws. ==X-Axis== In some cases, the belt tension might need adjustment on initial receipt. Movement should be smooth and not grainy or overly difficult. If the laser engraves at lower speed but at 100% speed the laser seems to jerk or stall, the belt tension should be loosened. If engraving lines do not appear straight, the belt tension should probably be increased. Adjust the bolts shown in the picture with a 3mm hex key. Purchase a long hex key and there is an access hole on the right hand side of the machine. Turning clockwise increases the belt tension. ==Y-Axis== To tighten the Y-Axis you may need a special long handled allen wrench unless you have exceptionally long allen keys. to the rear of the laser there are two round holes on either side located roughly where the belt tensioning mechanicanism is located; you must adjust the belts on both sides to the same tension as any difference in tension will cause the engraver to "parallelogram" jobs. == Lens == While its not mentioned anywhere.. the lens in the hobby laser is essentially free floating, cushioned only by a rubber washer in the head, this can cause problems in the print quality later if the lens doesn't settle flat; or if the lens wiggles due to vibration during cutting. The method i used to solve this was to make an ABS glue using acetone and small chunks of natural colored ABS feedstock from my makerbot which resulted in a thin white glue. Using three very small dabs around the perimeter of the lens was more then enough to hold the lens in place.. and daily breaks away from both the metal and the glass lens when its time to replace them.
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