This is the 5th version of my printable linear rail, I've gotten everything to finally work correctly. This can be used as a drop in replacement for a 3d printer's X or Y axis. It's rail system is designed to connect together to form any needed length.
This machine hopefully will be my entry for the Gada prize.
I worked out a few modifications to the shuttle. Now the lower half of the shuttle can be printed as well, this removes:
4x 5/16(8mm) nuts
2x 5/16(8mm) bolts
2x 5/16 washers
-The next to go is going to be replacing the front 5/16(8mm) hardware with all printed parts. I'm trying to pare this down just the motor and the printed parts.
-I also redesigned the Large helical gear to incorporate the 608 bearing embedded inside of it. think this is an advantage of trying to use 2 bearings in the pillow block. The large helical gear is also now held in place by a printed 8mm bolt 40mm long. This removes one additional piece of hardware.
-The shuttle top now has 4 mounting holes, although I'm just securing the motor with 2 at this point.
-I printed 2 new 3-segment rails, redesigned lower half of shuttle to be printed.
-I also added 2 new pics of the x/y gantry system and uploaded all new parts - I should have another video.
It's been brought to my attention that the rack file was missing from this. I have uploaded both the rack stl and scad file. Enjoy!
Here is a youtube video of it in action:
Comments and feedback are welcome.
You'll need to print at least 2 rails, preferably more. Tolerances are tight, you may need to file a few things to fit.
I'm working on a complete PDF with pix and assembly instructions, but for now:
Connect rails segments together by hammering in the connector block halfway, and then applying a little super glue afterwords. Coat the matching rail face with superglue or epoxy and hammer in the other side of the rail.
-After connecting rail segments together, use a < 8mm block with medium grit sand paper to sand inside the rails where the shuttle rides so there are no seams. You can "feel" the seams by running the completed shuttle up and down the rail
Additional hardware needed for the shuttle:
1x 30mm 5/16 bolts (or 8mm)
2x matching nuts
1x flat 5/16 washers
4x 608 bearings
1x NEMA 17 stepper motor
3x M3 bolts
1x M3 nut