Felix printers Felix 2.0 Instruction Manual page 24

Mount a pulley onto the motor-shaft upside down. The distance
between the bottom of the pulley and the face of the motor should be
approx 0.5mm, this can be adjusted later on if required.
Turn the frame in its upright position and mount the motor onto the
bracket. Notice the orientation of the motor.
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Assembly instruction manual FELIX 2.0 3d printer
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Guide the belt over the motor pulley back to the extruder carriage and
insert it in the toothed slot
Pull on the belt as indicated above and place the small tensioning
bracket in place when there is some tension on the belt. Place it just like
the picture above, that there is still some room to put more tension on
the bolt.
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