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Z-Axis Supports

by Eugene_B, published

Z-Axis Supports by Eugene_B Apr 11, 2013
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Z-Axis Supports by Eugene_B is licensed under the Creative Commons - Attribution license.

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Summary

The Z-axis supports and guide rod spacer are designed to provide a ridgid z-axis. The top supports help with alignment, by capturing the tops of the lead screws and holding the position relative to the guide rods. Users may find that the printer performs best with these disengaged.

Depending on your prints, a set screw may be helpful in capturing the bearings, as show in the image.

The mock bearings are for the top brackets and may be useful for alignment.

Eugene

-- A better lead screw Z-carriage mechanism/bracket is needed, something that allows for the screws to wobble a bit without causing torque inconsistencies or allowing lateral movement of the screws to affect Z-height.

Instructions

PLA printed at 0.3 mm layer height. I used support, but others may be more confident at printing horizontal holes than I currently am.

The procedure for aligning the Aluminatus T1 is a bit daunting. Essential, uses will want to loosen everything, including the Z stepper motor screws, base gantry mounts, Z-axis supports, lead screw nuts, and X-gantry/guide rode brackets.

Briefly, while operating the z-steppers as needed to help "float" everthing into position, the order of tightening would be.

Gantry-to-based brackets
Z-axis supports, including the top supports.
Initial vertical elevation alignment of X-gantry
Lead screw nuts
One screw on each guide rod-to-X-gantry bracket

  • Precisely check X-gantry vertical elevation from the base plate (not build bed).
    Final tighten of all guide rod bracket screws.
    Remove top Z-axis supports (constraining any screw wobble will likley increase z-ribbing.)

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