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Saturday, May 29, 2010

Z-Axis Drive Mechanism

All four spindles are driven at the same time by one stepper motor via this long belt and four pulleys. The Makerbot operator can also yank the belt to raise or lower the z-axis manually. This is done:

1. At the beginning, when you are centering the build platform and putting the nozzle right a 0,0,0
2. During the raft printing, to squish down the plastic.
3. At the end, if you haven't programmed in a lift at the end of the build.

To make sure I never made a mistake, I drew an arrow on the cabinet showing which way I should yank to raise the printing head!
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