Flsun i3 x/z axis 70 mm redesign

thingiverse

These replacement z-axis brackets are designed for the Flsun Prusa i3 printer, modified from the stock version and not yet thoroughly tested. Here's a list of improvements: z-axis rods run vertically in line with the belt, eliminating any twist when tensioning the x-axis belt x-axis rod holes include end stops to prevent twisting when applying tension to the x-axis belt integrated x-axis belt tensioner utilizes the same design as the y-axis bed belt Updated February 20, 2017: z-axis rods run vertically in line with the belt, eliminating any twist when tensioning the x-axis belt x-axis rod holes include end stops to prevent twisting when applying tension to the x-axis belt x-axis rod holes are now spaced at 70mm to match Prusa's standard, making it possible to install a standard Prusa gantry on these rails Updated February 23, 2017: extruder gantry bracket with integrated belt tensioner is uploaded x-axis belt tensioner is uploaded extruder gantry bracket includes adjustability in the z-axis for three positions, accommodating alternate extruders of different heights extruder bracket features reinforcement to maintain rigidity after installation and a ridge for the bracket to rest on Updated February 25, 2017: x-axis carriage updated with four increments to adjust the height of the extruder bracket for those who have upgraded their extruders; the increments are sized at 5mm the x-axis carriage now has a location for adding the limit switch also used I must print these parts to test fit everything, so please note that they have not been printed yet. I'd like to thank Mak-a-face for suggesting the belt tensioner design, which was the best pre-designed option I found: http://www.thingiverse.com/thing:745934/#files I also suggest upgrading z-axis motors during this upgrade: http://www.thingiverse.com/thing:2090980 Updated March 4, 2017: z-axis left and right and extruder carriage bracket holes for bearings are now corrected to 14.9mm for 15mm bearings files labeled v1.2 have been updated Updated March 24, 2017: minor alignment changes on all parts added a temporary mounting hole for a blower fan files labeled v1.3 have been updated Updated March 26-31, 2017: extruder carriage bracket STL alignment issues are corrected along with orientation extruder v1.6 added to the kit as an optional component if bearing fitment is an issue; this version allows for more compliance in the design similar to that of the z-axis left and right brackets minor adjustment on extruder bracket for better fit, file updated to v1.4 holes are added to visually confirm x-axis rods are inserted into the left and right brackets all the way in lead screw nuts mounting holes on left and right brackets are reduced in size to accept an M3 hole without a nut Gantry bracket holes for extruder bracket are reduced in size for a tight fit using m3 screws Note update April 21, 2017: I've modeled a version of the z-axis brackets with 45mm spacing for those who want to print the original Prusa carriage models found online. The files can be found here: http://www.thingiverse.com/thing:2265383 Print Settings Printer: Flsun Prusa i3 Rafts: No Supports: No Resolution: 0.2mm Infill: 15% Notes: PLA should work fine, but PETG or ABS might be better for this