Wasbot
thingiverse
I decided to upgrade my wombot to a complete linear rail for the Z axis as I was pretty sick of the wheels not performing well. This is my own design based off of using MGN12 linear rails for the Z axis. The linear rails need to be as long as your Z axis travel. Take into account the 30mm for extrusion each end of the travel when working out your linear rail length. Instead of purchasing v-slot nuts I decided to simply print my own. I have been using my printer every day for over a year with printed nuts, so I know they work well. I printed everything in PLA. For the printed nuts I simply tapped them out as either M3/M4/M5 to suit.
With this file you will be able to print Wasbot with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Wasbot.