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Changes to Step #14

Edit by Michael Hackney

Edit approved by Michael Hackney

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[title] Aligning the base
[* icon_caution] Once you have all of the cross member extrusions in place ''be very careful '' when moving the base unit around.
[* red] New you are going to align everything and tighten all (twenty-four) of the screws holding it together. Although not difficult, this is a critical step. If you tighten the base with a twist or obvious gaps at the end of the cross members, the printer will be difficult to calibrate. Follow these steps and you will not have a problem.
[* red] Find a piece of ~6mm (~1/4") rope or cord about 2.5m (8') long. Tie a loose loop in one end (see photo for example). You are going to use this cord as a belt to pull the base unit together while you tighten the screws.
[* red] Wrap the cord around the base as shown and pass the end through the loop. Then pull tight to bring everything into alignment. You do not have to make it ''Superman'' tight, just make sure everything is snug. Then tie-off the loose end to one of the ++upper cross members++ as shown.
[* red] Move the base assembly to the flattest smooth surface you can – a granite kitchen counter, smooth Formica™ counter or even a smooth table top work well. Just make sure it is clean (no crumbs!) and flat.
[* red] The process is to push all three bottom cross members flat against the table then tighten the six screws you can reach near the stepper motors. Once those are tight, remove the cord and carefully flip the base unit over.
[* red] Tighten the six ++top screws++ located inside the corner brackets. Make sure all twelve top screws are tight. Now push the lower three cross members flat against the table and repeat the previous step: tighten the six screws next to the steppers, flip over, and tighten the remaining six screws inside the corner brackets.
[* icon_caution] Make sure all twenty-four screws are tight. Lay the base on a flat surface with the '''XYZ''' labels facing up and test to see if it rocks or tips. If so, you need to loosen ''all of the screws'' and ''repeat this step'' again! So best to work carefully and get it right the first time.

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