The plastic parts that came with my i3 frame kit were unusable. And I wasn't able to print Prusa's original SCAD files from github very well. My other printer doesn't do long bridges well so I redesigned these parts to eliminate or at least minimize them.
I was a little concerned about using zip-ties but they seem to work well in holding the X rods and LM8UU bearings. The extruder isn't modified much from the original except for the placement of mounting holes. I ended up moving them around to get a good fit to the X carriage. That led to the J-Head slot mount plate's bolt hole placement being asymmetrical.
The laser cut holes for the Z rods were a bit oversized so I made a pair of supports. The Z rods are 12.5" versus the original 12" to accommodate them. Now that I think about it, I could have just printed the top header piece with a clamp built into it.
The top left X rod support needs to be carved out quite a bit If I intend to use the full volume in the Z axis. The extruder motor will hit it when it's at or near the zero position in the X axis. Maybe I should think about making a smaller extruder.
| endstops.stl | 304.1KB | |
| endstops_final.skp | 79.7KB | |
| extruder.stl | 1.0MB | |
| extruder_final.skp | 289.0KB | |
| extruder_gears.stl | 1.4MB | |
| extruder_gears_final.skp | 357.3KB | |
| hotend_fan_mount.stl | 305.6KB | |
| hotend_fan_mount_final.skp | 77.5KB | |
| x_carriage.stl | 772.9KB | |
| x_carriage_final.skp | 182.1KB | |
| x_ends.stl | 1.9MB | |
| x_ends_final.skp | 424.4KB | |
| z_support.stl | 1.1MB | |
| z_support_final.skp | 314.2KB |
