I have been so happy since I replaced the original gantry with this.
My TwoUwp got significantly reliable, and I have no fear for hours printing now. Also, the print quality improved, too.
This [v2] addresses the drawback on [v1], missing the range of motion about 1 inch from the original. The [v2] has about 12[mm] wider range of motion than [v1].
The [v2] still misses a few millimeter from the original design with the stock x-carriage (60[mm]). But once the x-carriage is upgraded to narrow versions, you actually gain wider !.
The followings are such examples. They are all 15[mm] narrower than the stock carriage.
Although I have tested this with only TwoUp, I'm also interested in the result or feedback from OneUp users, in which the range of motion is more important.
The "belt_clamp" is for the stock x-carriage users. No need to print if you already upgraded the x-carriage with built-in clamp such as http://www.thingiverse.com/thing:951718.
They are very flat design, which is subject to "warp" on printing. If you don't have a way to preheat the platform bed, start printing 0.1[mm] lower than your usual print, so that the 1st layer smeared with enough pressure to the printing bed. Or google "3d printing anti warping" to find a workaround which suits your setup.
Sandwich the LM8UU bearing, pulley belt, horizontal rods.
- M3 x 8[mm] for the steppe motor right-top, right-bottom
- M3 x 30[mm] for "z-axis_holder" (including the stepper motor hole at left-top)
- M3 x 25[mm] screw and M3 nuts for the rest.
There were feedback from an OneUp user, that the pulley belt got lose with this gantry.(thank you, "zabazoom" !) One of the followings is recommended for OneUp users.