I don't want to be an alarmist, but if you plan on applying large forces to the structure, I would make your z-axis rails a little wider to support the axis when extended. Also, you will probably have to beef up the gantry arms with gussets or some form of support as it will flex there too. the combination of just these two areas will prevent you from achieving good accuracy under loading.
... Just what I see from the drawings...
I'm keeping my X-axis rails high and close to the gantry cross members to eliminate the "arms"...only thing, you lose ability to access the table from the side easily, unless an "open" design is used allowing "reaching in". |