Finally got some time this weekend to work on the G-Rap Jr. (aka Frankenbot jr). With the LM8UU bearings, I wanted to go a different approach with clamping them in. When building the smartrap I took note that it was designed to be easy to assemble, but it resulted in the loss of rigidity and therefore reliability. I want to pull the ease of use but ensuring that the printer stays rigid. In this case, I chose to use a push in design for the bearings, but instead of having the ability to shift around, the screws that also hold the bearing set to the extruder head are running flush up against them. That way they are completely secure. Unless the extruder falls apart, those bearings aren’t going anywhere.
Also added a .3mm cut to the bottom do indicate that this is a X-axis bearing holder. It will make for a less confusing time when the builder goes to assemble their printer.
I am watching your progress intently on this latest project.
Are they known for shifting or moving inside the holder? There are so many Prusas with that sort of snap-fit bearing housing I would be surprised if those move around so that they need screws. On the other hand the weight penalty is insignificant.
@Samer_Najia awesome!! Glad you’re interested!
@Florian_Ford they are known to slide around overtime. I have to mount the piece to the faceplate of the extruder anyways so I figured this would allow me to both ensure that they don’t move and mount it up.
Hey, just an out-of-channel question for @Brook_Drumm : Any danger you’ll run out of the 8mm kits soon? I have a buddy who’s watching this build and is trying to decide when to jump in.
I can’t speak for Brook but to the best of my knowledge I think he intends to keep this kit how it is and in stock. But he can say for sure. @Brook_Drumm
