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Editing Step 26 —

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We will now build up the upper assembly. You will need the motor mount assemblies you previously built and the upper assembly base plate.

Install the timing pulleys on the motor shafts with the set screw up against the flat, as shown in the photo.

The upper assembly base plate has laser cut engraving on it that indicate the X, Y, and Z tower locations. Be sure to put that faced up towards you and away from your work surface.

As you did with the base assembly, orient and install the motor mount assemblies. Secure with 6-32 x 1" screws.

Repeat the process to install the injection molded side panels.

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