Orballo Anet A8 steel frame version of Tatara is not made to Tatara tolerances for smooth rods holes so there is some play. Rod can be fixed (up) using a screw and a nut but I wanted to incorporate lead-screw holder into solution. Had some 608ZZ bearings laying around so decided to use that.
Please note! I'm not sure fixing lead-screw is a good idea on this printer! In fact, I'm pretty sure it can make things worse (quality of prints, durability of leads-screw, etc) if lead-screw is not perfectly straight and properly aligned (which is very hard to do). But since this steel frame is very sturdy, my lead-screws very straight and I spent a lot of time aligning them perfectly... I decided to test it.
Smooth rods wobble at the bottom too. I'm currently designing those too. Since screws from Orballo i3 Prusa package are also too long for my steppers, I'll try to resolve that issue together and implement some stepper screws raiser plate too.
I'll be testing and reporting effects of each upgrade in my review of this frame at http://mirko.vukusic.net/3d%20printing/anet-a8-tatara-steel-frame-by-orballo-printing-review/
Devil Design PLA
- Holes need to be precise diameter. Play with "horizontal expansion" setting in Cura to get it right or use drill to widen them if too small.
- Mirror part on X axis to get version for the right side of the printer.
What else you need
for each side
- 3 x M3x12mm screws (same ones from Orballo package of screws and nuts for i3 Prusa )
- 1 x 608ZZ bearing
Putting it all together
- press fit bearings
- press fit screw nuts
(I used hammer)