Leapfrog Support Team Document - http://support.lpfrg.com
| Applies To Leapfrog Creatr Series Dual & XL:
| This solution instructs you on how to align both extrusion nozzles to the same height for optimum print quality.
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When there is a height difference between the two extruders; support material will not properly attach to the printed part or will melt into the printed part, the print sticker gets torn up, the object never succeeds in printing the base layer, or the object is repeatedly ran into by the lower of the two nozzles causing a failed print.
This guide will explain how to adjust both extruders to be at the same offset from the bed and in alignment with each other. It is important to point out that this process should precede the leveling and calibration of the print bed. It is not possible to properly calibrate the bed height until both nozzles are in perfect alignment with each other.
1. Loose the grub/set screws that secure the extruders in vertical position, you can locate them behind the fans as shown in the photo below. Make sure you turn the printer off before you attempt to loosen the grub/set screws behind the fans on the extruder. You just have to loosen the set screw you don't need to continue unscrewing it. You need a 2mm Allen key to loosen the grub/set screw.
2. You can use your hands or pliers to grip the block the hot end/nozzle passes through and gently pull straight down. Be very careful to pull straight down and not to bend or torque the block or hot end shaft in an awkward direction. If the heat was on recently you should use protective heat gloves for your hands to avoid burning yourself.
3. With the machine off manually move the print carriage to the center of the printing bed.
4. Turn the machine on and use your software to Home the Z-Axis - there will be a button in the section of your 3d printing software that gives you manual jog control over the printer. This button is usually symbolized with a picture of a home or is marked with the text "Z Home". Remember we just want to home the Z-Axis and not the X or Y-Axis. When the bed raises towards the nozzles you have lowered and left unsecured the bed will push the nozzles upwards to an equal aligned vertical position.
5. Turn the machine off and now tighten the grub/set screws located behind the fan blades on the nozzles to secure the extruders in perfect alignment with each other.
6. You must now calibrate your print bed height to ensure the proper gap between the nozzle tip and the glass bed covered with a print sticker. If you don't you could potentially have issues with print quality. Please consult the "Bed Height Calibration Solution Article".
Below are examples of acceptable and unacceptable nozzle to glass bed gap and their symptoms.
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Nozzle Height
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View
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Info
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Y/N
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Too High
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Too much distance will cause the filament to extrude into the air. This will not adhere to the bed.
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NO
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Perfect
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The tip of the nozzle is adding slight pressure to the top of the filament, greatly increasing how much filament is securely sticking to the bed and subsequent layers.
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YES
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Too Low
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The filament is not flowing properly, which can cause retrograde extrusion. Layers are predominantly choppy and short. Continued printing in this manner will likely cause a jam.
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NO
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