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.
JackJ106 - you probably have your motor connected wrong. With the Jr this is a huge problem -- there are a lot of people that have solved this here:
RetireeJay is especially helpful at that site -- just make sure and search the forum for your problem before you post your issue. You may find the answer in these links, and you will likely find it b/c someone else had it.