When building a 3D printer, there are lots of options you can go with for a build platform, and whether to have it heated or not. I will not go into all of them, but simply state what I am going to use compared to Toolson’s designs.
To support the print bed from the y-axis and the bed frame Prusa 3D printers use bolts, washers and nuts on each corner with a spring for tension. Toolson’s edition of the P3Steel does away with these springs and opts for a novel (genius) solution of using silicone dampeners.
Now that all the axis are complete, we can install the endstop/limit switches. These are simply a switch which is triggered mechanically by one of the printers moving parts hitting it, be it the hotend, print bed etc.
Either by fault of my own or tolerances in the steel rod or frame after successfully wiggling and inserting the rod, they did not fit snug and were not tight enough, This caused the rods to move as the print bed went back and forth. I did not want any possible movement in the rods, so investigated Thingiverse for a simple clip bracket to hold the rods in place at each end. A couple of minutes later and there was a simple little bracket design by user Hobsie which looked perfect and resolved the issue.
Y-Axis Carriage Now that the clamps are sorted it’s time to fit them to the blank y-carriage, as seen below. The 2.5 DXL frame uses four points to fasten bearings, some holes in the middle for the y-axis belt tension block and the bed screws holes at each corner. The middle “sticky-outy” part seen below … Read more
Bronze Bushings or LM8UU Bearings The standard Prusa builds (and most other 3D Printers, CNCs, engravers etc) use LMU88 linear bearings for all linear rod movements. They are the go to part when you use 8mm smooth rod as your axis guides and are cheap, easy to use and readily available. The quality of these … Read more