AO-100 Dual Material Setup

For the past 3 weeks we have been working on improving and expanding the capabilities of the AO-100 from Aleph Objects.
We noticed a few areas that could be improved. After loosing the Z axis alignment a few times, we started experiencing really bad wobble. Like really really bad. I think this is from flexing the x ends too far, but even after loosening and realigning we still experienced it. We found brass bushings and designed a mount so that the end of the bushing is at the same height as the nozzle. I remembered from a comment on http://www.thingiverse.com/thing:4740 how keeping the bushings at the same level as the nozzle would ensure the nozzle can rotate, but not translate, therefore reducing wobble. We also used nophead's coupler from http://www.thingiverse.com/thing:9622. In hind sight I would have printed the one from the Mendel90.

Next task was to add support for dual materials. Our original plan was to use two eMinebea motors (http://store.trinitylabs.com/trinitylabs-m