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MakerBot Print is our newest print-prepration software, which supports native CAD files and STL assemblies,
allows you to interact with all your printers via the Cloud, and many other exciting new features.

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Not only do you have to re-sync them occasionally during normal operation; the belt-driven z-axis fails gracefully, whereas two z-axis motors fail miserably. The belt-driven z-axis has proven to be much more reliable than two motors on the z-axis on every machine we've employed it. It's more efficient, the leadscrews are synced, and it runs faster. The key is...machine alignment. Without that - you should just run two motors...